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• Where do these mysterious DNS lookups come from and why are they slow?

  - by Hongli

  I have recently obtained a new dedicated server which I'm now setting up. It's running on 64-bit Debian 6.0. I have cloned a fairly large git repository (177 MB including working files) onto this server. Switching to a different branch is very very slow. On my laptop it takes 1-2 seconds, on this server it can take half a minute. After some investigation it turns out to be some kind of DNS timeout. Here's an exhibit from strace -s 128 git checkout release: stat("/etc/resolv.conf", {st_mode=S_IFREG|0644, st_size=132, ...}) = 0 socket(PF_INET, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 5 connect(5, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("213.133.99.99")}, 16) = 0 poll([{fd=5, events=POLLOUT}], 1, 0) = 1 ([{fd=5, revents=POLLOUT}]) sendto(5, "\235\333\1\0\0\1\0\0\0\0\0\0\35Debian-60-squeeze-64-minimal\n\17happyponies\3com\0\0\1\0\1", 67, MSG_NOSIGNAL, NULL, 0) = 67 poll([{fd=5, events=POLLIN}], 1, 5000) = 0 (Timeout) This snippet repeats several times per 'git checkout' call. My server's hostname was originally Debian-60-squeeze-64-minimal. I had changed it to shell.happyponies.com by running hostname shell.happyponies.com, editing /etc/hostname and rebooting the server. I don't understand the DNS protocol, but it looks like Git is trying to lookup the IP for Debian-60-squeeze-64-minimal as well as for happyponies.com. Why does Debian-60-squeeze-64-minimal come back even though I've already changed the host name? Why does Git perform DNS lookups at all? Why are these lookups so slow? I've already verified that all DNS servers in /etc/resolv.conf are up and responding slowly, yet Git's own lookups time out. Changing the host name back to Debian-60-squeeze-64-minimal seems to fix the slowness. Basically I just want to fix whatever DNS issues my server has because I'm sure they will cause more problems that just slowing down git checkout. But I'm not sure sure what the problem exactly is and what these symptoms mean.

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• Use preforker(ruby gem) with supervisor

  - by user1548832

  I also asked same question on stackoverflow.com http://stackoverflow.com/questions/13871169/use-preforkerruby-gem-with-supervisor But, superuser.com might much help to me. Can anyone amswer this? I want to run a server program using preforker ruby gem with supervisor. But error has occured. I wrote a following test program using preforker. #!/usr/bin/env ruby require 'rubygems' require 'preforker' Preforker.new(:app_name => 'test-preforker', :timeout => 60, :workers => 1) do |master| while master.wants_me_alive? do puts "hello" sleep 10 end end.run And a following supervisor config. [program:test-preforker] command=/home/tkono/tmp/test-preforker.rb stdout_logfile_maxbytes=1MB stderr_logfile_maxbytes=1MB stdout_logfile=/var/log/%(program_name)s.log stderr_logfile=/var/log/%(program_name)s.log autorestart=true Then, reload supervisor. # supervisorctl reload Restarted supervisord Here is the log file of supervisor. 2012-12-13 17:50:47,161 CRIT Supervisor running as root (no user in config file) 2012-12-13 17:50:47,163 WARN Included extra file "/etc/supervisor.d/test-preforker.ini" during parsing 2012-12-13 17:50:47,209 INFO RPC interface 'supervisor' initialized 2012-12-13 17:50:47,213 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2012-12-13 17:50:47,215 INFO supervisord started with pid 12437 2012-12-13 17:50:48,231 INFO spawned: 'test-preforker' with pid 12440 2012-12-13 17:50:48,233 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:49,248 INFO spawned: 'test-preforker' with pid 12441 2012-12-13 17:50:49,261 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:51,267 INFO spawned: 'test-preforker' with pid 12442 2012-12-13 17:50:51,284 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:54,305 INFO spawned: 'test-preforker' with pid 12443 2012-12-13 17:50:54,308 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:55,311 INFO gave up: test-preforker entered FATAL state, too many start retries too quickly Please tell me what is wrong? A program using preforker cannot run with supervisor? preforker https://github.com/dcadenas/preforker supervisor http://supervisord.org/index.html

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• IntellIJ editor doesn't appear

  - by neveu

  I updated my IntellIJ install to the latest version (11.1.4) and now the Editor window doesn't appear. Double-clicking on the file, jump-to-source, nothing happens. No error message, it just doesn't appear. If I double-click on an xml layout file the preview window works, but no Editor window. Have installed and reinstalled; went back to an earlier version and it doesn't work there either. I'm at a loss. Any ideas? Update: Editor works if I create a new project. Update 2: idea.log file includes this (I don't know what ins.android.sdk.AndroidSdkData is): 2012-11-04 20:40:52,481 [ 2677] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/macros.xml file is null 2012-11-04 20:40:52,481 [ 2677] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/macros.xml 2012-11-04 20:40:52,482 [ 2678] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/quicklists.xml file is null 2012-11-04 20:40:52,482 [ 2678] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/quicklists.xml 2012-11-04 20:40:52,564 [ 2760] INFO - pl.stores.ApplicationStoreImpl - 76 application components initialized in 1285 ms 2012-11-04 20:40:52,575 [ 2771] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/customization.xml file is null 2012-11-04 20:40:52,575 [ 2771] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/customization.xml 2012-11-04 20:40:52,674 [ 2870] INFO - ij.openapi.wm.impl.IdeRootPane - App initialization took 3385 ms 2012-11-04 20:40:53,136 [ 3332] INFO - TestNG Runner - Create TestNG Template Configuration 2012-11-04 20:40:53,138 [ 3334] INFO - TestNG Runner - Create TestNG Template Configuration 2012-11-04 20:40:53,253 [ 3449] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/dynamic.xml file is null 2012-11-04 20:40:53,253 [ 3449] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/dynamic.xml 2012-11-04 20:40:53,280 [ 3476] INFO - api.vfs.impl.local.FileWatcher - 1 paths checked, 0 mapped, 202 mks 2012-11-04 20:40:53,366 [ 3562] INFO - ellij.project.impl.ProjectImpl - 137 project components initialized in 403 ms 2012-11-04 20:40:53,563 [ 3759] INFO - .module.impl.ModuleManagerImpl - 4 modules loaded in 197 ms 2012-11-04 20:40:53,625 [ 3821] INFO - api.vfs.impl.local.FileWatcher - 6 paths checked, 0 mapped, 150 mks 2012-11-04 20:40:54,187 [ 4383] INFO - .roots.impl.DirectoryIndexImpl - Directory index initialized in 271 ms, indexed 1611 directories 2012-11-04 20:40:54,207 [ 4403] INFO - pl.PushedFilePropertiesUpdater - File properties pushed in 18 ms 2012-11-04 20:40:54,237 [ 4433] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/plainTextFiles.xml file is null 2012-11-04 20:40:54,237 [ 4433] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/plainTextFiles.xml 2012-11-04 20:40:54,246 [ 4442] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/gant_config.xml file is null 2012-11-04 20:40:54,246 [ 4442] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/gant_config.xml 2012-11-04 20:40:54,253 [ 4449] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/gradle.xml file is null 2012-11-04 20:40:54,253 [ 4449] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/gradle.xml 2012-11-04 20:40:55,855 [ 6051] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/IntelliLang.xml file is null 2012-11-04 20:40:55,855 [ 6051] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/IntelliLang.xml 2012-11-04 20:40:56,995 [ 7191] INFO - leEditor.impl.EditorsSplitters - splitter 2012-11-04 20:40:56,996 [ 7192] INFO - leEditor.impl.EditorsSplitters - splitter 2012-11-04 20:40:57,233 [ 7429] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/codeStyleSettings.xml file is null 2012-11-04 20:40:57,233 [ 7429] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/codeStyleSettings.xml 2012-11-04 20:40:57,234 [ 7430] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/projectCodeStyle.xml file is null 2012-11-04 20:40:57,234 [ 7430] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/projectCodeStyle.xml 2012-11-04 20:40:58,145 [ 8341] INFO - indexing.UnindexedFilesUpdater - Indexable files iterated in 3911 ms 2012-11-04 20:40:58,146 [ 8342] INFO - indexing.UnindexedFilesUpdater - Unindexed files update started: 0 files to update 2012-11-04 20:40:58,146 [ 8342] INFO - indexing.UnindexedFilesUpdater - Unindexed files update done in 0 ms 2012-11-04 20:40:58,362 [ 8558] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/fileColors.xml file is null 2012-11-04 20:40:58,362 [ 8558] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $PROJECT_CONFIG_DIR$/fileColors.xml 2012-11-04 20:41:00,420 [ 10616] INFO - ins.android.sdk.AndroidSdkData - For input string: "20.0.1" java.lang.NumberFormatException: For input string: "20.0.1" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:458) at java.lang.Integer.parseInt(Integer.java:499) at org.jetbrains.android.sdk.AndroidSdkData.parsePackageRevision(AndroidSdkData.java:86) at org.jetbrains.android.sdk.AndroidSdkData.<init>(AndroidSdkData.java:73) at org.jetbrains.android.sdk.AndroidSdkData.parse(AndroidSdkData.java:167) at org.jetbrains.android.sdk.AndroidPlatform.parse(AndroidPlatform.java:83) at org.jetbrains.android.sdk.AndroidSdkAdditionalData.getAndroidPlatform(AndroidSdkAdditionalData.java:119) at org.jetbrains.android.facet.AndroidFacet.addResourceFolderToSdkRootsIfNecessary(AndroidFacet.java:532) at org.jetbrains.android.facet.AndroidFacet.access$500(AndroidFacet.java:103) at org.jetbrains.android.facet.AndroidFacet$3.run(AndroidFacet.java:440) at com.intellij.ide.startup.impl.StartupManagerImpl$6.run(StartupManagerImpl.java:230) at com.intellij.ide.startup.impl.StartupManagerImpl.runActivities(StartupManagerImpl.java:203) at com.intellij.ide.startup.impl.StartupManagerImpl.access$100(StartupManagerImpl.java:41) at com.intellij.ide.startup.impl.StartupManagerImpl$4.run(StartupManagerImpl.java:170) at com.intellij.openapi.project.DumbServiceImpl.updateFinished(DumbServiceImpl.java:213) at com.intellij.openapi.project.DumbServiceImpl.access$1000(DumbServiceImpl.java:51) at com.intellij.openapi.project.DumbServiceImpl$IndexUpdateRunnable$1$3.run(DumbServiceImpl.java:363) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:702) at java.awt.EventQueue.access$400(EventQueue.java:82) at java.awt.EventQueue$2.run(EventQueue.java:663) at java.awt.EventQueue$2.run(EventQueue.java:661) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:672) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:699) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:538) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:420) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:378) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) 2012-11-04 20:41:00,459 [ 10655] INFO - ins.android.sdk.AndroidSdkData - For input string: "20.0.1" java.lang.NumberFormatException: For input string: "20.0.1" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48) at java.lang.Integer.parseInt(Integer.java:458) at java.lang.Integer.parseInt(Integer.java:499) at org.jetbrains.android.sdk.AndroidSdkData.parsePackageRevision(AndroidSdkData.java:86) at org.jetbrains.android.sdk.AndroidSdkData.<init>(AndroidSdkData.java:73) at org.jetbrains.android.sdk.AndroidSdkData.parse(AndroidSdkData.java:167) at org.jetbrains.android.sdk.AndroidPlatform.parse(AndroidPlatform.java:83) at org.jetbrains.android.sdk.AndroidSdkAdditionalData.getAndroidPlatform(AndroidSdkAdditionalData.java:119) at org.jetbrains.android.facet.AndroidFacet.addResourceFolderToSdkRootsIfNecessary(AndroidFacet.java:532) at org.jetbrains.android.facet.AndroidFacet.access$500(AndroidFacet.java:103) at org.jetbrains.android.facet.AndroidFacet$3.run(AndroidFacet.java:440) at com.intellij.ide.startup.impl.StartupManagerImpl$6.run(StartupManagerImpl.java:230) at com.intellij.ide.startup.impl.StartupManagerImpl.runActivities(StartupManagerImpl.java:203) at com.intellij.ide.startup.impl.StartupManagerImpl.access$100(StartupManagerImpl.java:41) at com.intellij.ide.startup.impl.StartupManagerImpl$4.run(StartupManagerImpl.java:170) at com.intellij.openapi.project.DumbServiceImpl.updateFinished(DumbServiceImpl.java:213) at com.intellij.openapi.project.DumbServiceImpl.access$1000(DumbServiceImpl.java:51) at com.intellij.openapi.project.DumbServiceImpl$IndexUpdateRunnable$1$3.run(DumbServiceImpl.java:363) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:702) at java.awt.EventQueue.access$400(EventQueue.java:82) at java.awt.EventQueue$2.run(EventQueue.java:663) at java.awt.EventQueue$2.run(EventQueue.java:661) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:672) at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:699) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:538) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:420) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:378) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) 2012-11-04 20:41:01,305 [ 11501] INFO - tor.impl.FileEditorManagerImpl - Project opening took 8374 ms 2012-11-04 20:41:01,719 [ 11915] INFO - dom.attrs.AttributeDefinitions - Found tag with unknown parent: AndroidManifest.AndroidManifestCompatibleScreens 2012-11-04 20:41:07,522 [ 17718] INFO - roid.compiler.tools.AndroidApt - [/Users/neveu/Dev/android-sdk-macosx/platform-tools/aapt] [package] [-m] [--non-constant-id] [-J] [/private/var/folders/xb/hg6cdxt51rs8lylmmjw0fk8m0000gp/T/android_apt_autogeneration6157451500950136901tmp] [-M] [/Users/neveu/Dev/magic_android/3rdParty/facebook/AndroidManifest.xml] [-S] [/Users/neveu/Dev/magic_android/3rdParty/facebook/res] [-I] [/Users/neveu/Dev/android-sdk-macosx/platforms/android-14/android.jar] 2012-11-04 20:41:08,706 [ 18902] INFO - roid.compiler.tools.AndroidApt - [/Users/neveu/Dev/android-sdk-macosx/platform-tools/aapt] [package] [-m] [-J] [/private/var/folders/xb/hg6cdxt51rs8lylmmjw0fk8m0000gp/T/android_apt_autogeneration3143184519400737414tmp] [-M] [/Users/neveu/Dev/magic_android/AndroidManifest.xml] [-S] [/Users/neveu/Dev/magic_android/res] [-I] [/Users/neveu/Dev/android-sdk-macosx/platforms/android-15/android.jar] 2012-11-04 20:41:08,763 [ 18959] INFO - roid.compiler.tools.AndroidIdl - [/Users/neveu/Dev/android-sdk-macosx/platform-tools/aidl] [-p/Users/neveu/Dev/android-sdk-macosx/platforms/android-15/framework.aidl] [-I/Users/neveu/Dev/magic_android/magic/src] [-I/Users/neveu/Dev/magic_android/src] [-I/Users/neveu/Dev/magic_android/3rdParty/Tapjoy] [-I/Users/neveu/Dev/magic_android/gen] [/Users/neveu/Dev/magic_android/src/com/android/vending/billing/IMarketBillingService.aidl] [/Users/neveu/Dev/magic_android/gen/com/android/vending/billing/IMarketBillingService.java] 2012-11-04 20:41:14,004 [ 24200] INFO - dom.attrs.AttributeDefinitions - Found tag with unknown parent: AndroidManifest.AndroidManifestCompatibleScreens 2012-11-04 20:41:18,781 [ 28977] INFO - s.impl.stores.FileBasedStorage - Document was not loaded for $APP_CONFIG$/cachedDictionary.xml file is null 2012-11-04 20:41:18,782 [ 28978] INFO - .impl.stores.XmlElementStorage - Document was not loaded for $APP_CONFIG$/cachedDictionary.xml

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• "PGError: no connection to the server" after idle

  - by user573484

  After my application sits idle overnight, when I try to access it in the morning I get a 500 Internal server error and the logs indicate "PGError: no connection to the server". After this first request if I refresh the page again everything is fine. I'm running Ubuntu 10.04 with apache 2, Passenger 3.0.2, Rails 2.3.8, and Postgres 8.4 on a remote server. Any ideas how to fix this? Here is the log: Processing ApplicationController#index (for 192.168.1.33 at 2011-01-06 17:28:14) [GET] Parameters: {"action"=>"index", "controller"=>"da"} ActiveRecord::StatementInvalid (PGError: no connection to the server : SELECT * FROM "users" WHERE ("users"."id" = 1) LIMIT 1): app/controllers/application_controller.rb:47:in `current_user' app/controllers/application_controller.rb:51:in `set_current_user' app/controllers/application_controller.rb:123:in `render_optional_error_file' passenger (3.0.2) lib/phusion_passenger/rack/request_handler.rb:96:in `process_request' passenger (3.0.2) lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request' passenger (3.0.2) lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop' passenger (3.0.2) lib/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler' passenger (3.0.2) lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `send' passenger (3.0.2) lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `handle_spawn_application' passenger (3.0.2) lib/phusion_passenger/utils.rb:479:in `safe_fork' passenger (3.0.2) lib/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:357:in `__send__' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:180:in `start' passenger (3.0.2) lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start' passenger (3.0.2) lib/phusion_passenger/spawn_manager.rb:219:in `spawn_rails_application' passenger (3.0.2) lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add' passenger (3.0.2) lib/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application' passenger (3.0.2) lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize' passenger (3.0.2) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize' passenger (3.0.2) lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application' passenger (3.0.2) lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application' passenger (3.0.2) lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:357:in `__send__' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop' passenger (3.0.2) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously' passenger (3.0.2) helper-scripts/passenger-spawn-server:99 /!\ FAILSAFE /!\ Thu Jan 06 17:28:14 -0700 2011 Status: 500 Internal Server Error PGError: no connection to the server : SELECT * FROM "users" WHERE ("users"."id" = 1) LIMIT 1 /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract_adapter.rb:221:in `log' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/postgresql_adapter.rb:520:in `execute' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/postgresql_adapter.rb:1002:in `select_raw' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/postgresql_adapter.rb:989:in `select' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/database_statements.rb:7:in `select_all_without_query_cache' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/query_cache.rb:60:in `select_all' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/query_cache.rb:81:in `cache_sql' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/query_cache.rb:60:in `select_all' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:664:in `find_by_sql' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1578:in `find_every' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1535:in `find_initial' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:616:in `find' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/base.rb:1910:in `find_by_id' /home/user/application/releases/20110106230903/app/controllers/application_controller.rb:47:in `current_user' /home/user/application/releases/20110106230903/app/controllers/application_controller.rb:51:in `set_current_user' /home/user/application/releases/20110106230903/app/controllers/application_controller.rb:123:in `render_optional_error_file' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/rescue.rb:97:in `rescue_action_in_public' /home/user/application/releases/20110106230903/vendor/plugins/exception_notification/lib/exception_notification/notifiable.rb:48:in `rescue_action_in_public' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/rescue.rb:154:in `rescue_action_without_handler' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/rescue.rb:74:in `rescue_action' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/base.rb:532:in `send' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/base.rb:532:in `process_without_filters' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/filters.rb:606:in `process' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/rescue.rb:65:in `call_with_exception' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:90:in `dispatch' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:121:in `_call' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:130 /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:29:in `call' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:29:in `call' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:9:in `cache' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/query_cache.rb:28:in `call' /var/lib/gems/1.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/string_coercion.rb:25:in `call' /var/lib/gems/1.8/gems/rack-1.1.0/lib/rack/head.rb:9:in `call' /var/lib/gems/1.8/gems/rack-1.1.0/lib/rack/methodoverride.rb:24:in `call' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/params_parser.rb:15:in `call' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/session/cookie_store.rb:99:in `call' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/failsafe.rb:26:in `call' /var/lib/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in `call' /var/lib/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in `synchronize' /var/lib/gems/1.8/gems/rack-1.1.0/lib/rack/lock.rb:11:in `call' /var/lib/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:106:in `call' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/rack/request_handler.rb:96:in `process_request' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `send' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `handle_spawn_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/utils.rb:479:in `safe_fork' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:357:in `__send__' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:180:in `start' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/spawn_manager.rb:219:in `spawn_rails_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:357:in `__send__' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop' /var/lib/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously' /var/lib/gems/1.8/gems/passenger-3.0.2/helper-scripts/passenger-spawn-server:99

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• How do you become software developer for satellites and other mission critical sw ?

  - by Stefano Borini

  I was wondering... There are people out there who code stuff going to mars, satellite control systems, nuclear facilities. What kind of training did they do ? What is their career path ?

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• Linux router: ping doesn't route back

  - by El Barto

  I have a Debian box which I'm trying to set up as a router and an Ubuntu box which I'm using as a client. My problem is that when the Ubuntu client tries to ping a server on the Internet, all the packets are lost (though, as you can see below, they seem to go to the server and back without problem). I'm doing this in the Ubuntu Box: # ping -I eth1 my.remote-server.com PING my.remote-server.com (X.X.X.X) from 10.1.1.12 eth1: 56(84) bytes of data. ^C --- my.remote-server.com ping statistics --- 13 packets transmitted, 0 received, 100% packet loss, time 12094ms (I changed the name and IP of the remote server for privacy). From the Debian Router I see this: # tcpdump -i eth1 -qtln icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 305, seq 7, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 305, seq 8, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 305, seq 8, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 305, seq 9, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 305, seq 9, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 305, seq 10, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 305, seq 10, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 305, seq 11, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 305, seq 11, length 64 ^C 9 packets captured 9 packets received by filter 0 packets dropped by kernel # tcpdump -i eth2 -qtln icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes IP 192.168.1.10 > X.X.X.X: ICMP echo request, id 360, seq 213, length 64 IP X.X.X.X > 192.168.1.10: ICMP echo reply, id 360, seq 213, length 64 IP 192.168.1.10 > X.X.X.X: ICMP echo request, id 360, seq 214, length 64 IP X.X.X.X > 192.168.1.10: ICMP echo reply, id 360, seq 214, length 64 IP 192.168.1.10 > X.X.X.X: ICMP echo request, id 360, seq 215, length 64 IP X.X.X.X > 192.168.1.10: ICMP echo reply, id 360, seq 215, length 64 IP 192.168.1.10 > X.X.X.X: ICMP echo request, id 360, seq 216, length 64 IP X.X.X.X > 192.168.1.10: ICMP echo reply, id 360, seq 216, length 64 IP 192.168.1.10 > X.X.X.X: ICMP echo request, id 360, seq 217, length 64 IP X.X.X.X > 192.168.1.10: ICMP echo reply, id 360, seq 217, length 64 ^C 10 packets captured 10 packets received by filter 0 packets dropped by kernel And at the remote server I see this: # tcpdump -i eth0 -qtln icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 1, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 1, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 2, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 2, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 3, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 3, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 4, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 4, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 5, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 5, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 6, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 6, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 7, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 7, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 8, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 8, length 64 IP Y.Y.Y.Y > X.X.X.X: ICMP echo request, id 360, seq 9, length 64 IP X.X.X.X > Y.Y.Y.Y: ICMP echo reply, id 360, seq 9, length 64 18 packets captured 228 packets received by filter 92 packets dropped by kernel Here "X.X.X.X" is my remote server's IP and "Y.Y.Y.Y" is my local network's public IP. So, what I understand is that the ping packets are coming out of the Ubuntu box (10.1.1.12), to the router (10.1.1.1), from there to the next router (192.168.1.1) and reaching the remote server (X.X.X.X). Then they come back all the way to the Debian router, but they never reach the Ubuntu box back. What am I missing? Here's the Debian router setup: # ifconfig eth1 Link encap:Ethernet HWaddr 94:0c:6d:82:0d:98 inet addr:10.1.1.1 Bcast:10.1.1.255 Mask:255.255.255.0 inet6 addr: fe80::960c:6dff:fe82:d98/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:105761 errors:0 dropped:0 overruns:0 frame:0 TX packets:48944 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:40298768 (38.4 MiB) TX bytes:44831595 (42.7 MiB) Interrupt:19 Base address:0x6000 eth2 Link encap:Ethernet HWaddr 6c:f0:49:a4:47:38 inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::6ef0:49ff:fea4:4738/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:38335992 errors:0 dropped:0 overruns:0 frame:0 TX packets:37097705 errors:0 dropped:0 overruns:0 carrier:1 collisions:0 txqueuelen:1000 RX bytes:4260680226 (3.9 GiB) TX bytes:3759806551 (3.5 GiB) Interrupt:27 eth3 Link encap:Ethernet HWaddr 94:0c:6d:82:c8:72 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:20 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:3408 errors:0 dropped:0 overruns:0 frame:0 TX packets:3408 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:358445 (350.0 KiB) TX bytes:358445 (350.0 KiB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:2767779 errors:0 dropped:0 overruns:0 frame:0 TX packets:1569477 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:3609469393 (3.3 GiB) TX bytes:96113978 (91.6 MiB) # route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.8.0.2 0.0.0.0 255.255.255.255 UH 0 0 0 tun0 127.0.0.1 0.0.0.0 255.255.255.255 UH 0 0 0 lo 10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0 192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth2 10.1.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth2 # arp -n # Note: Here I have changed all the different MACs except the ones corresponding to the Ubuntu box (on 10.1.1.12 and 192.168.1.12) Address HWtype HWaddress Flags Mask Iface 192.168.1.118 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.72 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.94 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.102 ether NN:NN:NN:NN:NN:NN C eth2 10.1.1.12 ether 00:1e:67:15:2b:f0 C eth1 192.168.1.86 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.2 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.61 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.64 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.116 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.91 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.52 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.93 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.87 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.92 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.100 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.40 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.53 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.1 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.83 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.89 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.12 ether 00:1e:67:15:2b:f1 C eth2 192.168.1.77 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.66 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.90 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.65 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.41 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.78 ether NN:NN:NN:NN:NN:NN C eth2 192.168.1.123 ether NN:NN:NN:NN:NN:NN C eth2 # iptables -L -n Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination # iptables -L -n -t nat Chain PREROUTING (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination MASQUERADE all -- 10.1.1.0/24 !10.1.1.0/24 MASQUERADE all -- !10.1.1.0/24 10.1.1.0/24 Chain OUTPUT (policy ACCEPT) target prot opt source destination And here's the Ubuntu box: # ifconfig eth0 Link encap:Ethernet HWaddr 00:1e:67:15:2b:f1 inet addr:192.168.1.12 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21e:67ff:fe15:2bf1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:28785139 errors:0 dropped:0 overruns:0 frame:0 TX packets:19050735 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:32068182803 (32.0 GB) TX bytes:6061333280 (6.0 GB) Interrupt:16 Memory:b1a00000-b1a20000 eth1 Link encap:Ethernet HWaddr 00:1e:67:15:2b:f0 inet addr:10.1.1.12 Bcast:10.1.1.255 Mask:255.255.255.0 inet6 addr: fe80::21e:67ff:fe15:2bf0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:285086 errors:0 dropped:0 overruns:0 frame:0 TX packets:12719 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:30817249 (30.8 MB) TX bytes:2153228 (2.1 MB) Interrupt:16 Memory:b1900000-b1920000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:86048 errors:0 dropped:0 overruns:0 frame:0 TX packets:86048 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11426538 (11.4 MB) TX bytes:11426538 (11.4 MB) # route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 10.1.1.1 0.0.0.0 UG 100 0 0 eth1 10.1.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 10.8.0.0 192.168.1.10 255.255.255.0 UG 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 # arp -n # Note: Here I have changed all the different MACs except the ones corresponding to the Debian box (on 10.1.1.1 and 192.168.1.10) Address HWtype HWaddress Flags Mask Iface 192.168.1.70 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.90 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.97 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.103 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.13 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.120 (incomplete) eth0 192.168.1.111 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.118 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.51 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.102 (incomplete) eth0 192.168.1.64 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.52 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.74 (incomplete) eth0 192.168.1.94 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.121 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.72 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.87 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.91 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.71 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.78 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.83 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.88 (incomplete) eth0 192.168.1.82 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.98 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.100 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.93 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.73 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.11 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.85 (incomplete) eth0 192.168.1.112 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.89 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.65 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.81 ether NN:NN:NN:NN:NN:NN C eth0 10.1.1.1 ether 94:0c:6d:82:0d:98 C eth1 192.168.1.53 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.116 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.61 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.10 ether 6c:f0:49:a4:47:38 C eth0 192.168.1.86 (incomplete) eth0 192.168.1.119 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.66 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.1 ether NN:NN:NN:NN:NN:NN C eth0 192.168.1.1 ether NN:NN:NN:NN:NN:NN C eth1 192.168.1.92 ether NN:NN:NN:NN:NN:NN C eth0 # iptables -L -n Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination # iptables -L -n -t nat Chain PREROUTING (policy ACCEPT) target prot opt source destination Chain INPUT (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination Edit: Following Patrick's suggestion, I did a tcpdump con the Ubuntu box and I see this: # tcpdump -i eth1 -qtln icmp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 21967, seq 1, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 21967, seq 1, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 21967, seq 2, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 21967, seq 2, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 21967, seq 3, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 21967, seq 3, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 21967, seq 4, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 21967, seq 4, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 21967, seq 5, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 21967, seq 5, length 64 IP 10.1.1.12 > X.X.X.X: ICMP echo request, id 21967, seq 6, length 64 IP X.X.X.X > 10.1.1.12: ICMP echo reply, id 21967, seq 6, length 64 ^C 12 packets captured 12 packets received by filter 0 packets dropped by kernel So the question is: if all packets seem to be coming and going, why does ping report 100% packet loss?

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• Week in Geek: LastPass Rescues Xmarks Edition

  - by Asian Angel

  This week we learned how to breathe new life into an aging Windows Mobile 6.x device, use filters in Photoshop, backup and move VirtualBox machines, use the BitDefender Rescue CD to clean an infected PC, and had fun setting up a pirates theme on our computers. Photo by _nash. Weekly Feature Do you love using the Faenza icon set on your Ubuntu system but feel that there are a few much needed icons missing (or you desire a different version of a particular icon)? Then you may want to take a look at the Faenza Variants icon pack. The icons are available in the following sizes: 16px, 22px, 32px, 48px and scalable sizes. Photo by Asian Angel. Faenza Variants Random Geek Links Another week with extra link goodness to help keep you on top of the news. Photo by Asian Angel. LastPass acquires Xmarks, premium service announced Xmarks announced that it has been acquired by LastPass, a cross-platform password management service. This also means that Xmarks is now in transition from a “free” to a “freemium” business model. WikiLeaks reappears on European Net domains WikiLeaks has re-emerged on a Swiss Internet domain followed by domains in Germany, Finland, and the Netherlands, sidestepping a move that had in effect taken the controversial site off the Internet. Iran: Yes, Stuxnet hurt our nuclear program The Stuxnet worm got some big play from Iranian President Mahmoud Ahmadinejad, who acknowledged that the malware dinged his nuclear program. More Windows Rogues than Just AV – Fake Defragmenter Check Disk Don’t think for a second that rogues are limited to scareware, because as so-called products such as “System Defragmenter”, “Scan Disk” “Check Disk” prove, they’re not. Internet Explorer’s Protected Mode can be bypassed Researchers from Verizon Business have now described a way of bypassing Protected Mode in IE 7 and 8 in order to gain access to user accounts. Can you really see who viewed your Facebook profile? Rogue application spreads virally Once again, a rogue application is spreading virally between Facebook users pretending to offer you a way of seeing who has viewed your profile. More holes in Palm’s WebOS Researchers Orlando Barrera and Daniel Herrera, who both work for security firm SecTheory, have discovered a gaping security hole in Palm’s WebOS smartphone operating system. Next-gen banking Trojans hit APAC With the proliferation of banking Trojans, Web and smartphone users of online banking services have to be on constant alert to avoid falling prey to fraud schemes, warned Etay Maor, project manager for RSA Fraud Action. AVG update cripples 64-bit computers A signature update automatically deployed by the AVG virus scanner Thursday has crippled numerous computers. Article includes link to forums to fix computers affected after a restart. Congress moves to outlaw ‘mystery charges’ for Web shoppers Legislation that makes it illegal for Web merchants and so-called post-transaction marketers to charge credit cards without the card owners’ say-so came closer to becoming law this week. Ballmer Set to “Look Into” Windows Home Server Drive Extender Fiasco Tuesday’s announcement from Microsoft regarding the removal of Drive Extender from Windows Home Server has sent shock waves across the web. Google tweaks search recipe to ding scam artists Google has changed its search algorithm to penalize sites deemed to provide an “extremely poor user experience” following a New York Times story on a merchant who justified abusive behavior towards customers as a search-engine optimization tactic. Geek Video of the Week Watch as our two friends debate back and forth about the early adoption of new technology through multiple time periods (Stone Age to the far future). Will our reluctant friend finally succumb to the temptation? Photo by CollegeHumor. Early Adopters Through History Random TinyHacker Links Fix Issues in Windows 7 Using Reliability Monitor Learn how to analyze Windows 7 errors and then fix them using the built-in reliability monitor. Learn About IE Tab Groups Tab groups is a useful feature in IE 8. Here’s a detailed guide to what it is all about. Google’s Book Helps You Learn About Browsers and Web A cool new online book by the Google Chrome team on browsers and the web. TrustPort Internet Security 2011 – Good Security from a Less Known Provider TrustPort is not exactly a well-known provider of security solutions. At least not in the consumer space. This review tests in detail their latest offering. How the World is Using Cell phones An infographic showing the shocking demographics of cell phone use. Super User Questions See the great answers to these questions from Super User. I am unable to access my C drive. It says it is unable to display current owner. List of Windows special directories/shortcuts like ‘%TEMP%’ Is using multiple passes for wiping a disk really necessary? How can I view two files side by side in Notepad++ Is there any tool that automatically puts screenshots to my Dropbox? How-To Geek Weekly Article Recap Look through our hottest articles from this past week at How-To Geek. How to Create a Software RAID Array in Windows 7 9 Alternatives for Windows Home Server’s Drive Extender Why Doesn’t Disk Cleanup Delete Everything from the Temp Folder? Ask the Readers: How Much Do You Customize Your Operating System? How to Upload Really Large Files to SkyDrive, Dropbox, or Email One Year Ago on How-To Geek Enjoy reading through these awesome articles from one year ago. How To Upgrade from Vista to Windows 7 Home Premium Edition How To Fix No Aero Transparency in Windows 7 Troubleshoot Startup Problems with Startup Repair Tool in Windows 7 & Vista Rename the Guest Account in Windows 7 for Enhanced Security Disable Error Reporting in XP, Vista, and Windows 7 The Geek Note That wraps things up here for this week. Regardless of the weather wherever you may be, we hope that you have an opportunity to get outside and have some fun! Remember to keep sending those great tips in to us at [email protected]. Photo by Tony the Misfit. Latest Features How-To Geek ETC The How-To Geek Guide to Learning Photoshop, Part 8: Filters Get the Complete Android Guide eBook for Only 99 Cents [Update: Expired] Improve Digital Photography by Calibrating Your Monitor The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography How to Choose What to Back Up on Your Linux Home Server How To Harmonize Your Dual-Boot Setup for Windows and Ubuntu Hang in There Scrat! – Ice Age Wallpaper How Do You Know When You’ve Passed Geek and Headed to Nerd? On The Tip – A Lamborghini Theme for Chrome and Iron What if Wile E. Coyote and the Road Runner were Human? [Video] Peaceful Winter Cabin Wallpaper Store Tabs for Later Viewing in Opera with Tab Vault

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• Multiple markers in Googe Maps API v3 that link to different pages when clicked

  - by Dave

  I have a map with multiple markers, which I populate via an array. Each marker is clickable and should take the user to a different url per marker. The problem is that all the markers, while displaying the correct title, all use the url of the last entry in the array. Here is my code: var myOptions = { zoom: 9, center: new google.maps.LatLng(40.81940575,-73.95647955), mapTypeId: google.maps.MapTypeId.TERRAIN } var map = new google.maps.Map(document.getElementById("bigmap"), myOptions); setMarkers(map, properties); var properties = [ ['106 Ft Washington Avenue',40.8388485,-73.9436015,'Mjg4'], ['213 Bennett Avenue',40.8574384,-73.9333426,'Mjkz'], ['50 Overlook Terrace',40.8543752,-73.9362542,'Mjky'], ['850 West 176 Street',40.8476012,-73.9417571,'OTM='], ['915 West End Avenue',40.8007478,-73.9692155,'Mjkx']]; function setMarkers(map, buildings) { var image = new google.maps.MarkerImage('map_marker.png', new google.maps.Size(19,32), new google.maps.Point(0,0), new google.maps.Point(10,32)); var shadow = new google.maps.MarkerImage('map_marker_shadow.png', new google.maps.Size(28,32), new google.maps.Point(0,0), new google.maps.Point(10,32)); var bounds = new google.maps.LatLngBounds; for (var i in buildings) { var myLatLng = new google.maps.LatLng(buildings[i][1], buildings[i][2]); bounds.extend(myLatLng); var marker = new google.maps.Marker({ position: myLatLng, map: map, shadow: shadow, icon: image, title: buildings[i][0] }); google.maps.event.addListener(marker, 'click', function() { window.location = ('detail?b=' + buildings[i][3]); }); } map.fitBounds(bounds); } Using this code, clicking any marker take the user to 'detail?b=Mjkx' What am I doing wrong?

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• Populating FullCalendar events from MVC

  - by jasonmhirst

  I've having difficulty in populating FullCalendar from MVC and would like a little assistance on the matter please. I have the following code for my controller: Function GetEvents(ByVal [start] As Double, ByVal [end] As Double) As JsonResult Dim sqlConnection As New SqlClient.SqlConnection sqlConnection.ConnectionString = My.Settings.sqlConnection Dim sqlCommand As New SqlClient.SqlCommand sqlCommand.CommandText = "SELECT tripID AS ID, tripName AS Title, DATEDIFF(s, '1970-01-01 00:00:00', dateStart) AS [Start], DATEDIFF(s, '1970-01-01 00:00:00', dateEnd) AS [End] FROM tblTrip WHERE userID=18 AND DateStart IS NOT NULL" sqlCommand.Connection = sqlConnection Dim ds As New DataSet Dim da As New SqlClient.SqlDataAdapter(sqlCommand) da.Fill(ds, "Meetings") sqlConnection.Close() Dim meetings = From c In ds.Tables("Meetings") Select {c.Item("ID"), c.Item("Title"), "False", c.Item("Start"), c.Item("End")} Return Json(meetings.ToArray(), JsonRequestBehavior.AllowGet) End Function This does indeed run correctly but the format that is returned is: [[25,"South America 2008","False",1203033600,1227657600],[48,"Levant 2009","False",1231804800,1233619200],[49,"South America 2009","False",1235433600,1237420800],[50,"Italy 2009","False",1241049600,1256083200],[189,"Levant 2010a","False",1265414400,1267574400],[195,"Levant 2010a","False",1262736000,1262736000],[208,"Levant 2010a","False",1264982400,1267574400],[209,"Levant 2010a","False",1264982400,1265587200],[210,"Levant 2010","False",1264982400,1266969600],[211,"Levant 2010 b","False",1267056000,1267574400],[213,"South America 2010a","False",1268438400,1269648000],[214,"Levant 2010 c","False",1266364800,1264118400],[215,"South America 2010a","False",1268611200,1269648000],[217,"South America 2010","False",1268611200,1269561600],[218,"South America 2010 b","False",1268956800,1269388800],[227,"levant 2010 b","False",1265846400,1266192000]] And this is totally different to what I've seen on the post from here: http://stackoverflow.com/questions/2445359/jquery-fullcalendar-json-date-issue (note the lack of tag information and curly braces) Can someone please explain to me what I may be doing wrong and why my output isn't correctly formatted. TIA

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• Ant build from Android-generated build file fails - how to fix?

  - by Eno

  Building our Android app from Ant fails with this error: [apply] [apply] UNEXPECTED TOP-LEVEL ERROR: [apply] java.lang.OutOfMemoryError: Java heap space [apply] at java.util.HashMap.<init>(HashMap.java:209) [apply] at java.util.HashSet.<init>(HashSet.java:86) [apply] at com.android.dx.ssa.Dominators.compress(Dominators.java:96) [apply] at com.android.dx.ssa.Dominators.eval(Dominators.java:132) [apply] at com.android.dx.ssa.Dominators.run(Dominators.java:213) [apply] at com.android.dx.ssa.DomFront.run(DomFront.java:84) [apply] at com.android.dx.ssa.SsaConverter.placePhiFunctions(SsaConverter.java:265) [apply] at com.android.dx.ssa.SsaConverter.convertToSsaMethod(SsaConverter.java:51) [apply] at com.android.dx.ssa.Optimizer.optimize(Optimizer.java:100) [apply] at com.android.dx.ssa.Optimizer.optimize(Optimizer.java:74) [apply] at com.android.dx.dex.cf.CfTranslator.processMethods(CfTranslator.java:269) [apply] at com.android.dx.dex.cf.CfTranslator.translate0(CfTranslator.java:131) [apply] at com.android.dx.dex.cf.CfTranslator.translate(CfTranslator.java:85) [apply] at com.android.dx.command.dexer.Main.processClass(Main.java:297) [apply] at com.android.dx.command.dexer.Main.processFileBytes(Main.java:276) [apply] at com.android.dx.command.dexer.Main.access$100(Main.java:56) [apply] at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:228) [apply] at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245) [apply] at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:130) [apply] at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:108) [apply] at com.android.dx.command.dexer.Main.processOne(Main.java:245) [apply] at com.android.dx.command.dexer.Main.processAllFiles(Main.java:183) [apply] at com.android.dx.command.dexer.Main.run(Main.java:139) [apply] at com.android.dx.command.dexer.Main.main(Main.java:120) [apply] at com.android.dx.command.Main.main(Main.java:87) BUILD FAILED Ive tried giving Ant more memory by setting ANT_OPTS="-Xms256m -Xmx512m". (This build machine has 1Gb RAM). Do I just need more memory or is there anything else I can try?

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• Django Error - AttributeError: 'Settings' object has no attribute 'LOCALE_PATHS'

  - by Randy Simon

  I am trying to learn django by following along with this tutorial. I am using django version 1.1.1 I run django-admin.py startproject mysite and it creates the files it should. Then I try to start the server by running python manage.py runserver but here is where I get the following error. Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 362, in execute_manager utility.execute() File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 303, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 195, in run_from_argv self.execute(*args, **options.__dict__) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 213, in execute translation.activate('en-us') File "/Library/Python/2.6/site-packages/django/utils/translation/__init__.py", line 73, in activate return real_activate(language) File "/Library/Python/2.6/site-packages/django/utils/translation/__init__.py", line 43, in delayed_loader return g['real_%s' % caller](*args, **kwargs) File "/Library/Python/2.6/site-packages/django/utils/translation/trans_real.py", line 205, in activate _active[currentThread()] = translation(language) File "/Library/Python/2.6/site-packages/django/utils/translation/trans_real.py", line 194, in translation default_translation = _fetch(settings.LANGUAGE_CODE) File "/Library/Python/2.6/site-packages/django/utils/translation/trans_real.py", line 172, in _fetch for localepath in settings.LOCALE_PATHS: File "/Library/Python/2.6/site-packages/django/utils/functional.py", line 273, in __getattr__ return getattr(self._wrapped, name) AttributeError: 'Settings' object has no attribute 'LOCALE_PATHS' Now, I can add a LOCAL_PATH atribute set to an empty string to my settings.py file but then it just complains about another setting and so on. What am I missing here?

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• Annoying Twisted Python problem

  - by Kalmi

  I'm trying to answer the following question out of personal interest: What is the fastest way to send 100,000 HTTP requests in Python? And this is what I have came up so far, but I'm experiencing something very stange. When installSignalHandlers is True, it just hangs. I can see that the DelayedCall instances are in reactor._newTimedCalls, but processResponse never gets called. When installSignalHandlers is False, it throws an error and works. from twisted.internet import reactor from twisted.web.client import Agent from threading import Semaphore, Thread import time concurrent = 100 s = Semaphore(concurrent) reactor.suggestThreadPoolSize(concurrent) t=Thread( target=reactor.run, kwargs={'installSignalHandlers':True}) t.daemon=True t.start() agent = Agent(reactor) def processResponse(response,url): print response.code, url s.release() def processError(response,url): print "error", url s.release() def addTask(url): req = agent.request('HEAD', url) req.addCallback(processResponse, url) req.addErrback(processError, url) for url in open('urllist.txt'): addTask(url.strip()) s.acquire() while s._Semaphore__value!=concurrent: time.sleep(0.1) reactor.stop() And here is the error that it throws when installSignalHandlers is True: (Note: This is the expected behaviour! The question is why it doesn't work when installSignalHandlers is False.) Traceback (most recent call last): File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 396, in fireEvent DeferredList(beforeResults).addCallback(self._continueFiring) File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 224, in addCallback callbackKeywords=kw) File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 213, in addCallbacks self._runCallbacks() File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 371, in _runCallbacks self.result = callback(self.result, *args, **kw) --- <exception caught here> --- File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 409, in _continueFiring callable(*args, **kwargs) File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 1165, in _reallyStartRunning self._handleSignals() File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 1105, in _handleSignals signal.signal(signal.SIGINT, self.sigInt) exceptions.ValueError: signal only works in main thread What am I doing wrong and what is the right way? I'm new to twisted.

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• python manage.py runserver fails

  - by Randy Simon

  I am trying to learn django by following along with this tutorial. I am using django version 1.1.1 I run django-admin.py startproject mysite and it creates the files it should. Then I try to start the server by running python manage.py runserver but here is where I get the following error. Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 362, in execute_manager utility.execute() File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 303, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 195, in run_from_argv self.execute(*args, **options.__dict__) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 213, in execute translation.activate('en-us') File "/Library/Python/2.6/site-packages/django/utils/translation/__init__.py", line 73, in activate return real_activate(language) File "/Library/Python/2.6/site-packages/django/utils/translation/__init__.py", line 43, in delayed_loader return g['real_%s' % caller](*args, **kwargs) File "/Library/Python/2.6/site-packages/django/utils/translation/trans_real.py", line 205, in activate _active[currentThread()] = translation(language) File "/Library/Python/2.6/site-packages/django/utils/translation/trans_real.py", line 194, in translation default_translation = _fetch(settings.LANGUAGE_CODE) File "/Library/Python/2.6/site-packages/django/utils/translation/trans_real.py", line 172, in _fetch for localepath in settings.LOCALE_PATHS: File "/Library/Python/2.6/site-packages/django/utils/functional.py", line 273, in __getattr__ return getattr(self._wrapped, name) AttributeError: 'Settings' object has no attribute 'LOCALE_PATHS' Now, I can add a LOCALE_PATH atribute and set to an empty tuple to my settings.py file but then it just complains about another setting and so on. What am I missing here?

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• Error "Input length must be multiple of 8 when decrypting with padded cipher"

  - by Ross Peoples

  I am trying to move a project from C# to Java for a learning exercise. I am still very new to Java, but I have a TripleDES class in C# that encrypts strings and returns a string value of the encrypted byte array. Here is my C# code: using System; using System.IO; using System.Collections.Generic; using System.Security.Cryptography; using System.Text; namespace tDocc.Classes { /// <summary> /// Triple DES encryption class /// </summary> public static class TripleDES { private static byte[] key = { 110, 32, 73, 24, 125, 66, 75, 18, 79, 150, 211, 122, 213, 14, 156, 136, 171, 218, 119, 240, 81, 142, 23, 4 }; private static byte[] iv = { 25, 117, 68, 23, 99, 78, 231, 219 }; /// <summary> /// Encrypt a string to an encrypted byte array /// </summary> /// <param name="plainText">Text to encrypt</param> /// <returns>Encrypted byte array</returns> public static byte[] Encrypt(string plainText) { UTF8Encoding utf8encoder = new UTF8Encoding(); byte[] inputInBytes = utf8encoder.GetBytes(plainText); TripleDESCryptoServiceProvider tdesProvider = new TripleDESCryptoServiceProvider(); ICryptoTransform cryptoTransform = tdesProvider.CreateEncryptor(key, iv); MemoryStream encryptedStream = new MemoryStream(); CryptoStream cryptStream = new CryptoStream(encryptedStream, cryptoTransform, CryptoStreamMode.Write); cryptStream.Write(inputInBytes, 0, inputInBytes.Length); cryptStream.FlushFinalBlock(); encryptedStream.Position = 0; byte[] result = new byte[encryptedStream.Length]; encryptedStream.Read(result, 0, (int)encryptedStream.Length); cryptStream.Close(); return result; } /// <summary> /// Decrypt a byte array to a string /// </summary> /// <param name="inputInBytes">Encrypted byte array</param> /// <returns>Decrypted string</returns> public static string Decrypt(byte[] inputInBytes) { UTF8Encoding utf8encoder = new UTF8Encoding(); TripleDESCryptoServiceProvider tdesProvider = new TripleDESCryptoServiceProvider(); ICryptoTransform cryptoTransform = tdesProvider.CreateDecryptor(key, iv); MemoryStream decryptedStream = new MemoryStream(); CryptoStream cryptStream = new CryptoStream(decryptedStream, cryptoTransform, CryptoStreamMode.Write); cryptStream.Write(inputInBytes, 0, inputInBytes.Length); cryptStream.FlushFinalBlock(); decryptedStream.Position = 0; byte[] result = new byte[decryptedStream.Length]; decryptedStream.Read(result, 0, (int)decryptedStream.Length); cryptStream.Close(); UTF8Encoding myutf = new UTF8Encoding(); return myutf.GetString(result); } /// <summary> /// Decrypt an encrypted string /// </summary> /// <param name="text">Encrypted text</param> /// <returns>Decrypted string</returns> public static string DecryptText(string text) { if (text == "") { return text; } return Decrypt(Convert.FromBase64String(text)); } /// <summary> /// Encrypt a string /// </summary> /// <param name="text">Unencrypted text</param> /// <returns>Encrypted string</returns> public static string EncryptText(string text) { if (text == "") { return text; } return Convert.ToBase64String(Encrypt(text)); } } /// <summary> /// Random number generator /// </summary> public static class RandomGenerator { /// <summary> /// Generate random number /// </summary> /// <param name="length">Number of randomizations</param> /// <returns>Random number</returns> public static int GenerateNumber(int length) { byte[] randomSeq = new byte[length]; new RNGCryptoServiceProvider().GetBytes(randomSeq); int code = Environment.TickCount; foreach (byte b in randomSeq) { code += (int)b; } return code; } } /// <summary> /// Hash generator class /// </summary> public static class Hasher { /// <summary> /// Hash type /// </summary> public enum eHashType { /// <summary> /// MD5 hash. Quick but collisions are more likely. This should not be used for anything important /// </summary> MD5 = 0, /// <summary> /// SHA1 hash. Quick and secure. This is a popular method for hashing passwords /// </summary> SHA1 = 1, /// <summary> /// SHA256 hash. Slower than SHA1, but more secure. Used for encryption keys /// </summary> SHA256 = 2, /// <summary> /// SHA348 hash. Even slower than SHA256, but offers more security /// </summary> SHA348 = 3, /// <summary> /// SHA512 hash. Slowest but most secure. Probably overkill for most applications /// </summary> SHA512 = 4, /// <summary> /// Derrived from MD5, but only returns 12 digits /// </summary> Digit12 = 5 } /// <summary> /// Hashes text using a specific hashing method /// </summary> /// <param name="text">Input text</param> /// <param name="hash">Hash method</param> /// <returns>Hashed text</returns> public static string GetHash(string text, eHashType hash) { if (text == "") { return text; } if (hash == eHashType.MD5) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA1) { SHA1Managed hasher = new SHA1Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA256) { SHA256Managed hasher = new SHA256Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA348) { SHA384Managed hasher = new SHA384Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.SHA512) { SHA512Managed hasher = new SHA512Managed(); return ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); } else if (hash == eHashType.Digit12) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); string newHash = ByteToHex(hasher.ComputeHash(Encoding.ASCII.GetBytes(text))); return newHash.Substring(0, 12); } return ""; } /// <summary> /// Generates a hash based on a file's contents. Used for detecting changes to a file and testing for duplicate files /// </summary> /// <param name="info">FileInfo object for the file to be hashed</param> /// <param name="hash">Hash method</param> /// <returns>Hash string representing the contents of the file</returns> public static string GetHash(FileInfo info, eHashType hash) { FileStream hashStream = new FileStream(info.FullName, FileMode.Open, FileAccess.Read); string hashString = ""; if (hash == eHashType.MD5) { MD5CryptoServiceProvider hasher = new MD5CryptoServiceProvider(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA1) { SHA1Managed hasher = new SHA1Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA256) { SHA256Managed hasher = new SHA256Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA348) { SHA384Managed hasher = new SHA384Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } else if (hash == eHashType.SHA512) { SHA512Managed hasher = new SHA512Managed(); hashString = ByteToHex(hasher.ComputeHash(hashStream)); } hashStream.Close(); hashStream.Dispose(); hashStream = null; return hashString; } /// <summary> /// Converts a byte array to a hex string /// </summary> /// <param name="data">Byte array</param> /// <returns>Hex string</returns> public static string ByteToHex(byte[] data) { StringBuilder builder = new StringBuilder(); foreach (byte hashByte in data) { builder.Append(string.Format("{0:X1}", hashByte)); } return builder.ToString(); } /// <summary> /// Converts a hex string to a byte array /// </summary> /// <param name="hexString">Hex string</param> /// <returns>Byte array</returns> public static byte[] HexToByte(string hexString) { byte[] returnBytes = new byte[hexString.Length / 2]; for (int i = 0; i <= returnBytes.Length - 1; i++) { returnBytes[i] = byte.Parse(hexString.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber); } return returnBytes; } } } And her is what I've got for Java code so far, but I'm getting the error "Input length must be multiple of 8 when decrypting with padded cipher" when I run the test on this: import java.security.InvalidAlgorithmParameterException; import java.security.InvalidKeyException; import javax.crypto.Cipher; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import com.tdocc.utils.Base64; public class TripleDES { private static byte[] keyBytes = { 110, 32, 73, 24, 125, 66, 75, 18, 79, (byte)150, (byte)211, 122, (byte)213, 14, (byte)156, (byte)136, (byte)171, (byte)218, 119, (byte)240, 81, (byte)142, 23, 4 }; private static byte[] ivBytes = { 25, 117, 68, 23, 99, 78, (byte)231, (byte)219 }; public static String encryptText(String plainText) { try { if (plainText.isEmpty()) return plainText; return Base64.decode(TripleDES.encrypt(plainText)).toString(); } catch (Exception e) { e.printStackTrace(); } return null; } public static byte[] encrypt(String plainText) throws InvalidKeyException, InvalidAlgorithmParameterException, NoSuchPaddingException { try { final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(ivBytes); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, key, iv); final byte[] plainTextBytes = plainText.getBytes("utf-8"); final byte[] cipherText = cipher.doFinal(plainTextBytes); return cipherText; } catch (Exception e) { e.printStackTrace(); } return null; } public static String decryptText(String message) { try { if (message.isEmpty()) return message; else return TripleDES.decrypt(message.getBytes()); } catch (Exception e) { e.printStackTrace(); } return null; } public static String decrypt(byte[] message) { try { final SecretKey key = new SecretKeySpec(keyBytes, "DESede"); final IvParameterSpec iv = new IvParameterSpec(ivBytes); final Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding"); cipher.init(Cipher.DECRYPT_MODE, key, iv); final byte[] plainText = cipher.doFinal(message); return plainText.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } }

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• Implementing a customized drawable in Android

  - by Girish

  Hi , I was trying to get hold of 2D graphics in Android. As a example i want to implement a custom drawable and show it in my Activity I have defined a customized drawable by extending from Android drawable as mentioned below myDrawable extends Drawable { private static final String TAG = myDrawable.class.getSimpleName(); private ColorFilter cf; @Override public void draw(Canvas canvas) { //First you define a colour for the outline of your rectangle Paint rectanglePaint = new Paint(); rectanglePaint.setARGB(255, 255, 0, 0); rectanglePaint.setStrokeWidth(2); rectanglePaint.setStyle(Style.FILL); //Then create yourself a Rectangle RectF rectangle = new RectF(15.0f, 50.0f, 55.0f, 75.0f); //in pixels Log.d(TAG,"On Draw method"); // TODO Auto-generated method stub Paint paintHandl = new Paint(); // paintHandl.setColor(0xaabbcc); paintHandl.setARGB(125, 234, 213, 34 ); RectF rectObj = new RectF(5,5,25,25); canvas.drawRoundRect(rectangle, 0.5f, 0.5f, rectanglePaint); } @Override public int getOpacity() { // TODO Auto-generated method stub return 100; } @Override public void setAlpha(int alpha) { // TODO Auto-generated method stub } @Override public void setColorFilter(ColorFilter cf) { // TODO Auto-generated method stub this.cf = cf; } } I am trying to get this displayed in my activity, as shown below public class custDrawable extends Activity { /** Called when the activity is first created. */ LinearLayout layObj = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); layObj = (LinearLayout) findViewById(R.id.parentLay); ImageView imageView = (ImageView) findViewById(R.id.icon2); myDrawable myDrawObj = new myDrawable(); imageView.setImageDrawable(myDrawObj); imageView.invalidate(); // layObj.addView(myDrawObj, params); } } But when i run the app i see no rectangle on the activity, can anyone help me out? Where am i going wrong?

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• Objective-C NSMutableDictionary Disappearing

  - by blackmage

  I am having this problem with the NSMutableDictionary where the values are not coming up. Snippets from my code look like this: //Data into the Hash and then into an array yellowPages = [[NSMutableArray alloc] init]; NSMutableDictionary *address1=[[NSMutableDictionary alloc] init]; [address1 setObject:@"213 Pheasant CT" forKey: @"Street"]; [address1 setObject:@"NC" forKey: @"State"]; [address1 setObject:@"Wilmington" forKey: @"City"]; [address1 setObject:@"28403" forKey: @"Zip"]; [address1 setObject:@"Residential" forKey: @"Type"]; [yellowPages addObject:address1]; NSMutableDictionary *address2=[[NSMutableDictionary alloc] init]; [address1 setObject:@"812 Pheasant CT" forKey: @"Street"]; [address1 setObject:@"NC" forKey: @"State"]; [address1 setObject:@"Wilmington" forKey: @"City"]; [address1 setObject:@"28403" forKey: @"Zip"]; [address1 setObject:@"Residential" forKey: @"Type"]; [yellowPages addObject:address2]; //Iterate through array pulling the hash and insert into Location Object for(int i=0; i<locationCount; i++){ NSMutableDictionary *anAddress=[theAddresses getYellowPageAddressByIndex:i]; //Set Data Members Location *addressLocation=[[Location alloc] init]; addressLocation.Street=[anAddress objectForKey:@"Street"]; locations[i]=addressLocation; NSLog(addressLocation.Street); } So the problem is only the second address is printed, the 813 and I can't figure out why. Can anyone offer any help?

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• LINQ Query to DataTable.DataSource

  - by lumberjack

  I am trying to perform a LINQ query on a DataTable and show the result in another DataTable. My source DataTable looks something like this: DataTable myDataTable = new DataTable(); myDataTable.Columns.Add("OrderID", typeof(int)); myDataTable.Columns.Add("Date", typeof(DateTime)); myDataTable.Columns.Add("UnitsPurchased", typeof(int)); The resulting DataTable looks like this when filled: Order ID Date Units Purchased 16548 10/15/09 250 17984 11/03/09 512 20349 01/11/10 213 34872 01/15/10 175 My current LINQ query looks like this: IEnumerable<DataRow> query = (from row in myDataTable.AsEnumerable() where row.UnitsPurchased > 200 select new { row.OrderID, row.Date, row.UnitsPurchased }) as IEnumerable<DataRow>; resultDataTable.DataSource = query.CopyToDataTable<DataRow>(); Every time I run this code query is null. I can see that that the as IEnumerable<DataRow> is the culprit, but it makes no since to me since DataTable.AsEnumerable() returns an IEnumerable<DataRow>. Any help would be appreciated.

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• To have an Integer pointing to 3 ordered lists in Java

  - by Masi

  Which datastructure would you use in the place of X to have efficient merges, sorts and additions as described below? #1 Possible solution: one HashMap to X -datastructure Having a HashMap pointing from fileID to some datastructure linking word, wordCount and wordID may be a good solution. However, I have not found a way to implement it. I am not allowed to use Postgres or any similar tool to keep my data neutralized. I want to have efficient merges, sorts and additions according to fileID, wordID or wordCount for the type below. I have the type Words which has th field fileID that points to a list of words and to relating pieces of information: The Type class Words =================================== fileID: int [list of words] : ArrayList [list of wordCounts] : ArrayList [list of wordIDs] : ArrayList Example of the data in fileID word wordCount wordID instance1 of words 1 He 123 1111 1 llo 321 2 instance2 of words 2 Van 213 666 2 cou 777 932 Example of needed merge fileID wordID fileID wordID 1 2 1 3 wordID=2 2 2 ========> 1 2 2 3 2 2 I cannot see any usage of set-operations such as intersections here because order is needed. Having about three HashMaps makes sorting difficult: from word to wordID in a given fileID from wordID to fileID from wordID to wordCount in a given fileID

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• datanucleus enhancer & javaw: "the parameter is incorrect"

  - by Riley

  I'm on windows XP using eclipse and the datanucleus enhancer for a gwt + gae app. When I run the enhancer, I get an error: Error Thu Oct 21 16:33:57 CDT 2010 Cannot run program "C:\Program Files\Java\jdk1.6.0_18\bin\javaw.exe" (in directory "C:\ag\dev"): CreateProcess error=87, The parameter is incorrect java.io.IOException: Cannot run program "C:\Program Files\Java\jdk1.6.0_18\bin\javaw.exe" (in directory "C:\ag\dev"): CreateProcess error=87, The parameter is incorrect at java.lang.ProcessBuilder.start(Unknown Source) at com.google.gdt.eclipse.core.ProcessUtilities.launchProcessAndActivateOnError(ProcessUtilities.java:213) at com.google.appengine.eclipse.core.orm.enhancement.EnhancerJob.runInWorkspace(EnhancerJob.java:154) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: CreateProcess error=87, The parameter is incorrect at java.lang.ProcessImpl.create(Native Method) at java.lang.ProcessImpl.<init>(Unknown Source) at java.lang.ProcessImpl.start(Unknown Source) ... 5 more I've had this problem before, and it was due to a long classpath. I just spent an hour and a half shortening my classpath by moving libraries around and even moving my eclipse install, but with no luck. Any ideas about where I should start to look for an answer? The error message doesn't include any information about what directory it's in or anything. It's kind of infuriating! Is it possible to make the output of javaw more verbose? Is it possible to get around this class-path size bug?

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• "RewriteBase: argument is not a valid URL" error

  - by user305434

  hi, I'm trying to configure .htaccess of my website. http://213.175.210.49/~incisozl/ is the temporary url to the root(~/public_html/). when I try to rewrite the url at .htaccess i get an /home/incisozl/public_html/.htaccess: RewriteBase: argument is not a valid URL, referer: ht tp://213.175.210.49/~incisozl/inci-sozluk/somestring error. my rewrite rule is; RewriteEngine On RewriteBase / RewriteRule ^/?$ /index.php [L] RewriteRule ^inci-sozluk/([^.\?/]+)/([0-9]+)/?$ /seo.php?process=word&q=$1&sayfa=$2 [L] RewriteRule ^inci-sozluk/([^.\?/]+)?$ /seo.php?process=word&q=$1 [L] RewriteRule ^inci-sozluk/([^.\?/]+)/([0-9]+)/([0-9]+)/?$ /seo.php?process=word&q=$1&sayfa=$2&gid=$3 [L] RewriteRule ^inci-sozluktest/([^.\?/]+)/([0-9]+)/([0-9]+)/?$ /seo.php?process=wordtest&q=$1&sayfa=$2&gid=$3 [L] RewriteRule ^inci-sozluk-bugun/([^.\?/]+)/([0-9]+)/?$ /seo.php?process=wordbg&q=$1&sayfa=$2 [L] RewriteRule ^inci-sozluk-bugun/([^.\?/]+)/([0-9]+)/([0-9]+)/?$ /seo.php?process=wordbg&q=$1&sayfa=$2&gid=$3 [L] RewriteRule ^inci-sozluk-dun/([^.\?/]+)/([0-9]+)/([0-9]+)/?$ /seo.php?process=worddn&q=$1&sayfa=$2&gid=$3 [L] RewriteRule ^inci-sozluk-dun/([^.\?/]+)/([0-9]+)/?$ /seo.php?process=worddn&q=$1&sayfa=$2 [L] RewriteRule ^inci-sozluk-ters/([^.\?/]+)/([0-9]+)/?$ /seo.php?process=wordts&q=$1&sayfa=$2 [L] RewriteRule ^inci-sozluk-ters/([^.\?/]+)/([0-9]+)/([0-9]+)/?$ /seo.php?process=wordts&q=$1&sayfa=$2&gid=$3 [L] RewriteRule ^inci-sozluk-cvpters/([^.\?/]+)/([0-9]+)/?$ /seo.php?process=cvpwordts&q=$1&sayfa=$2 [L] RewriteRule ^inci-sozluk-cvpters/([^.\?/]+)/([0-9]+)/([0-9]+)/?$ /seo.php?process=cvpwordts&q=$1&sayfa=$2&gid=$3 [L] RewriteRule ^inci-sozluk-ileti/([0-9]+)/?$ /seo.php?process=eid&eid=$1 [L] RewriteRule ^inci-sozluk-ileticvp/([0-9]+)/?$ /seo.php?process=cvpeid&eid=$1 [L] btw. it works fine when i use it with www.incisozluk.org pointed domain

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• CruiseControlException "log.xml does not exist" help

  - by Castanho

  Hi all.... I have a project that have cruiseControl running to build our things. In my config.main I have a <onsuccess> with a <antpublisher> But when some error occur in the ANT I'm receiving a exception: exception publishing results with net.sourceforge.cruisecontrol.publishers.OnSuccessPublisher for project usforce net.sourceforge.cruisecontrol.CruiseControlException: ant logfile /home/usforce/cruisecontrol-bin-2.7.3/log.xml does not exist. at net.sourceforge.cruisecontrol.builders.AntBuilder.getAntLogAsElement(AntBuilder.java:424) at net.sourceforge.cruisecontrol.builders.AntBuilder.build(AntBuilder.java:213) at net.sourceforge.cruisecontrol.publishers.AntPublisher.publish(AntPublisher.java:86) at net.sourceforge.cruisecontrol.publishers.ConditionalPublisher.publish(ConditionalPublisher.java:61) at net.sourceforge.cruisecontrol.Project.publish(Project.java:750) at net.sourceforge.cruisecontrol.Project.build(Project.java:264) at net.sourceforge.cruisecontrol.Project.execute(Project.java:149) at net.sourceforge.cruisecontrol.ProjectConfig.execute(ProjectConfig.java:405) at net.sourceforge.cruisecontrol.ProjectWrapper.run(ProjectWrapper.java:69) at java.lang.Thread.run(Thread.java:595) I really dont have this log.xml... And I don'k know how this file should be, a log4j? Commons? I google it and could not found what this file for.. Well any tips could help! Thanks in advance

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• reactor not working when reactor.run is not called in the main thread and installSignalHandlers=Fals

  - by Kalmi

  I'm trying to answer the following question out of personal interest: What is the fastest way to send 100,000 HTTP requests in Python? And this is what I have came up so far, but I'm experiencing something very stange. When installSignalHandlers is True, it just hangs. I can see that the DelayedCall instances are in reactor._newTimedCalls, but processResponse never gets called. When installSignalHandlers is False, it throws an error and works. from twisted.internet import reactor from twisted.web.client import Agent from threading import Semaphore, Thread import time concurrent = 100 s = Semaphore(concurrent) reactor.suggestThreadPoolSize(concurrent) t=Thread( target=reactor.run, kwargs={'installSignalHandlers':True}) t.daemon=True t.start() agent = Agent(reactor) def processResponse(response,url): print response.code, url s.release() def processError(response,url): print "error", url s.release() def addTask(url): req = agent.request('HEAD', url) req.addCallback(processResponse, url) req.addErrback(processError, url) for url in open('urllist.txt'): addTask(url.strip()) s.acquire() while s._Semaphore__value!=concurrent: time.sleep(0.1) reactor.stop() And here is the error that it throws when installSignalHandlers is True: (Note: This is the expected behaviour! The question is why it doesn't work when installSignalHandlers is False.) Traceback (most recent call last): File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 396, in fireEvent DeferredList(beforeResults).addCallback(self._continueFiring) File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 224, in addCallback callbackKeywords=kw) File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 213, in addCallbacks self._runCallbacks() File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 371, in _runCallbacks self.result = callback(self.result, *args, **kw) --- <exception caught here> --- File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 409, in _continueFiring callable(*args, **kwargs) File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 1165, in _reallyStartRunning self._handleSignals() File "/usr/lib/python2.6/dist-packages/twisted/internet/base.py", line 1105, in _handleSignals signal.signal(signal.SIGINT, self.sigInt) exceptions.ValueError: signal only works in main thread What am I doing wrong and what is the right way? I'm new to twisted.

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• how can i use gwt-test-utils to work with gin?

  - by krrish

  i tried using the steps in http://code.google.com/p/gwt-test-utils/wiki/HowToUseWithGIN and i'm using testNG but it is giving fallowing error java.lang.ExceptionInInitializerError at com.riskfocus.examples.JsonReaderWriterTest.setupGIN(JsonReaderWriterTest.java:59) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80) at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:551) at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213) at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:138) at org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:175) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:107) at org.testng.TestRunner.privateRun(TestRunner.java:768) at org.testng.TestRunner.run(TestRunner.java:617) at org.testng.SuiteRunner.runTest(SuiteRunner.java:334) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291) at org.testng.SuiteRunner.run(SuiteRunner.java:240) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:53) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:87) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185) at org.testng.TestNG.runSuitesLocally(TestNG.java:1110) at org.testng.TestNG.run(TestNG.java:1022) at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:109) at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:202) at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:173) Caused by: java.lang.UnsupportedOperationException: ERROR: GWT.create() is only usable in client code! It cannot be called, for example, from server code. If you are running a unit test, check that your test case extends GWTTestCase and that GWT.create() is not called from within an initializer or constructor. at com.google.gwt.core.client.GWT.create(GWT.java:91) at com.riskfocus.examples.client.model.StockPriceJsonReaderWriter.<clinit>(StockPriceJsonReaderWriter.java:12) ... 25 more

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• Parsing some results returned by nokogiri in ruby, getting an error message

  - by Khat

  The following code returns an error: require 'nokogiri' require 'open-uri' @doc = Nokogiri::HTML(open("http://www.amt.qc.ca/train/deux-montagnes/deux-montagnes.aspx")) #@doc = Nokogiri::HTML(File.open("deux-montagnes.html")) stations = @doc.xpath("//area") stations.each { |station| str = station reg = /href="(.*)" title="(.*)"/ href = reg.match(str)[1] title = reg.match(str)[2] page = /.*\/(.*).aspx$/.match(href)[1] puts href puts title puts page base_url = "http://www.amt.qc.ca" complete_url = base_url + href puts complete_url } ERROR: station_names_from_map.rb:9:in `block in <main>': undefined method `[]' for nil:NilClass (NoMethodError) from /opt/local/lib/ruby1.9/gems/1.9.1/gems/nokogiri-1.4.1/lib/nokogiri/xml/node_set.rb:213:in `block in each' from /opt/local/lib/ruby1.9/gems/1.9.1/gems/nokogiri-1.4.1/lib/nokogiri/xml/node_set.rb:212:in `upto' from /opt/local/lib/ruby1.9/gems/1.9.1/gems/nokogiri-1.4.1/lib/nokogiri/xml/node_set.rb:212:in `each' from station_names_from_map.rb:7:in `<main>' shell returned 1 While this code works: str = '<area shape="poly" alt="Deux-Montagnes" coords="59,108,61,106,65,106,67,108,67,113,65,115,61,115,59,113" href="/train/deux-montagnes/deux-montagnes.aspx" title="Deux-Montagnes">' reg = /href="(.*)" title="(.*)"/ href = reg.match(str)[1] title = reg.match(str)[2] page = /.*\/(.*).aspx$/.match(href)[1] puts href puts title puts page base_url = "http://www.amt.qc.ca" complete_url = base_url + href puts complete_url Any reason why?

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• HTML Agility Pack

  - by Harikrishna

  I have html tables in one webpage like <table border=1> <tr><td>sno</td><td>sname</td></tr> <tr><td>111</td><td>abcde</td></tr> <tr><td>213</td><td>ejkll</td></tr> </table> <table border=1> <tr><td>adress</td><td>phoneno</td><td>note</td></tr> <tr><td>asdlkj</td><td>121510</td><td>none</td></tr> <tr><td>asdlkj</td><td>214545</td><td>none</td></tr> </table> Now from this webpage using html agility pack I want to extract the data of the column address and phone no only. It means for that I have find first in which table there is column address and phoneno.After finding that table I want to extract the data of that column address and phoneno what should I do ? I can get the table. But after that what should I do don't understand.

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