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• Is this use of PreparedStatements in a Thread in JAVA correct?

  - by Gormcito

  I'm still an undergrad just working part time and so I'm always trying to be aware of better ways to do things. Recently I had to write a program for work where the main thread of the program would spawn "task" threads (for each db "task" record) which would perform some operations and then update the record to say that it has finished. Therefore I needed a database connection object and PreparedStatement objects in or available to the ThreadedTask objects. This is roughly what I ended up writing, is creating a PreparedStatement object per thread a waste? I thought static PreparedStatments could create race conditions... Thread A stmt.setInt(); Thread B stmt.setInt(); Thread A stmt.execute(); Thread B stmt.execute(); A´s version never gets execed.. Is this thread safe? Is creating and destroying PreparedStatement objects that are always the same not a huge waste? public class ThreadedTask implements runnable { private final PreparedStatement taskCompleteStmt; public ThreadedTask() { //... taskCompleteStmt = Main.db.prepareStatement(...); } public run() { //... taskCompleteStmt.executeUpdate(); } } public class Main { public static final db = DriverManager.getConnection(...); }

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• Whether to put method code in a VB.Net data storage class, or put it in a separate class?

  - by Alan K

  TLDR summary: (a) Should I include (lengthy) method code in classes which may spawn multiple objects at runtime, (b) does doing so cause memory usage bloat, (c) if so should I "outsource" the code to a class that is loaded only once and have the class methods call that, or alternatively (d) does the code get loaded only once with the object definition anyway and I'm worrying about nothing? ........ I don't know whether there's a good answer to this but if there is I haven't found it yet by searching in the usual places. In my VB.Net (2010 if it matters) WinForms project I have about a dozen or so class objects in an object model. Some of these are pretty simple and do little more than act as data storage repositories. The ones further up the object model, however, have an increasing number of methods. There can be a significant number of higher level objects in use though the exact number will be runtime dependent so I can't be more precise than that. As I was writing the method code for one of the top level ones I noticed that it was starting to get quite lengthy. Memory optimisation is something of a lost art given how much memory the average PC has these days but I don't want to make my application a resource hog. So my questions for anyone who knows .Net way better than I do (of which there will be many) are: Is the code loaded into memory with each instance of the class that's created? Alternatively is it loaded only once with the definition of the class, and all derived objects just refer to that definition? (I'm not really sure how that could be possible given that, for example, event handlers can be assigned dynamically, but no harm asking.) If the answer to the first one is yes, would it be more efficient to write the code in a "utility" object which is loaded only once and called from the real class' methods? Any thoughts appreciated.

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• How can I write simulations in Erlang?

  - by rick

  Hi guys, I want to do some numerical stuff in Erlang like this: You've got an array with the following values: [2,3,4] In each iteration, you calculate 0.1 * [n-1] + 0.7 *[n] + 0.2 * [n+1] This becomes the new [n]. If n == 0 then [n-1] = 0. If [n] == length of array then [n] = 0. So I try an example: [2,3,4] calculations: 0.1 * 0 + 0.7 * 2 + 0.2 * 3 = 2 0.1 * 2 + 0.7 * 3 + 0.2 * 4 = 3.1 0.1 * 3 + 0.7 * 4 + 0.2 * 0 = 3.1 So [2,3,4] becomes to [2, 3.1, 3.1] after one iteration. I know how to write this in a non-functional language like C. But I have difficulties to imagine, how this could be done in Erlang. I found some tutorials on how you read a file to a list. So this is not the problem. How can I spawn different Erlang processes that each process has one element of the list? How can I do calculations by communicating with 'the neighbors', so that the neighbors know where their neigbors are generically, without specifying each? How can I collect the data into a list? Eventually, is it possible to solve that problem in Erlang at all? Thanks for your help.

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• Sys. engineer has decided to dynamically transform all XSLs into DLLs on website build process. DLL

  - by John Sullivan

  Hello, OS: Win XP. Here is my situation. I have a browser based application. It is "wrapped" in a Visual Basic application. Our "Systems Engineer Senior" has decided to spawn DLL files from all of our XSL pages (many of which have duplicate names) upon building a new instance of the website and have the active server pages (ASPX) use the DLL instead. This has created a "known issue" in which ~200 DLL naming conflicts occur and, thus, half of our application is broken. I think a solution to this problem is that, thankfully, we're generating the names of the DLLs and linking them up with our application dynamically. Therefore we can do something kludgy like generate a hash and append it to the end of the DLL file name when we build our website, then always reference the DLL that had some kind of random string / hash appended to its name. Aside from outright renaming the DLLs, is there another way to have multiple DLLs with the same name register for one application? I think the answer is "No, only between different applications using a special technique." Please confirm. Another question I have on my mind is whether this whole idea is a good practice -- converting our XSL pages (which we use in mass -- every time a response from our web app occurs) into DLL functions that call a "function" to do what the XSL page did via an active server page (ASPX), when we were before just sending an XML response to an XSL page via aspx.

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• game currency convert: math efficient

  - by Comradsky

  For variables:4 text views named diamondText, goldText, silverText, and bronzeText;money variable unsigned int money;and an NSTimer, every .1 sec,runs function: -(void)updateMoney{ money++; bronzeText.text = [NSString stringWithFormat:@"%d",money]; silverText.text = [NSString stringWithFormat:@"%d",money%10]; goldText.text = [NSString stringWithFormat:@"%d",money%100]; diamondText.text= [NSString stringWithFormat:@"%d",money%1000]; } Given that my currency is diamond = 10 gold = 10 silver = 10 bronze = 1; What would be most efficient way to calculate and display the money labels? How would you store this variable, with GameCenter and NSDictionary or GameCenter and something else? More details are below if you don't understand. To clarify: bronze has the last 2 numbers, silver has the next 2 numbers, and so on. I understand I could use 4 ints or an array, but i would rather try to use this method, unless theres a much more efficient way. Example: When money = 1000;bronzeText = nothing, silverText = 10,goldText = nothing, diamondText = nothing; What other ways would you do this that you think would be more efficient? I will be calling a function (void)collisionDetector that detects if my player.frame crosses with a flyingObject.frame, and if that object is a coin it gives an added value to money and then calls (void)updateMoney. Im just using the timer to test this and spawn these flying objects.

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• Collision between 2 objects of the same class

  - by user1826033

  Okay, so I have an enemy class(With rotation, position, texture and so on). I spawn a few enemies on the screen, they move around, but they overlap each other. So I tried to do a collision check between two enemies of the same class. But no matter what method I try, it isn't quite working. The best thing I tried was: foreach (Enemy enemy1 in enemies) { enemy1Pos = new Vector2(enemy1.position.X, enemy1.position.Y) foreach (Enemy enemy2 in enemies) { enemy2Pos = new Vector2(enemy2.position.X, enemy2.position.Y) if (Vector2.Distance(enemy2Pos, enemy1Pos) < 200) { enemy1Pos += new Vector2((float)(enemy1.Speed * Math.Cos(enemy1.Rotation)), (float)(enemy1.Speed * Math.Sin(enemy1.Rotation))); } } } This is not to exact code, so it might have some mistakes in it. Anyway when i implemented this solution, the enemies were not overlapping so everything was fine on that part. But, they were always moving to the right side of the screen. I've also looked up flocking etc, but I would like to know, how can I detect collision between 2 objects of the same class?

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• C++ Instantiate class and add name to array/vector then cycle through update functions from the array

  - by SD42

  I have a bunch of classes in a basic (and badly coded!) game engine that are currently instantiated in the code and have to have their individual update functions called. What I want to do is be able to create an instance of a class, pass the name to an array, and then subsequently cycle through the array to call the update functions of each class. I'm unsure as to whether or not this is an impossible or spectacularly stupid way of trying to manage objects, so please tell me if it is. So currently I might have manually instantiated Enemy class a couple of times: Enemy enem1; Enemy enem2; I then have to update them manually in the game loop: enem1.update(); enem2.update(); What method should I use to be able to spawn and destroy instances of the enemy class during gametime? Is it possible to populate an array with instantiated names and then do something like (and i'm aware this doesn't work); array[x].update(); Then iterate through the names in the array? Anything that even points me in the right direction would be greatly appreciated!

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• Update php 5.2.0 to 5.2.4 with aptitude

  - by Kiva

  Hi guy, I would like to update my php 5 in my server. At this moment, I use php 5.2.0 so I want to update it to php 5.2.4 (not php 5.3). I tried to do this: aptitude update aptitude upgrade 63 packets were updated but not php which is always in 5.0 How can I update my php please ? Here is the output of commands asked by David in another post: aptitude search php5 p libapache-mod-php5 - server-side, HTML-embedded scripting langu i A libapache2-mod-php5 - server-side, HTML-embedded scripting langu i php5 - server-side, HTML-embedded scripting langu p php5-apache2-mod-bt - PHP bindings for mod_bt p php5-auth-pam - A PHP5 extension for PAM authentication i php5-cgi - server-side, HTML-embedded scripting langu p php5-clamavlib - PHP ClamAV Lib - ClamAV Interface for PHP5 p php5-cli - command-line interpreter for the php5 scri i A php5-common - Common files for packages built from the p i php5-curl - CURL module for php5 p php5-dev - Files for PHP5 module development i A php5-gd - GD module for php5 p php5-idn - PHP api for the IDNA library p php5-imagick - ImageMagick module for php5 p php5-imap - IMAP module for php5 p php5-interbase - interbase/firebird module for php5 p php5-json - JSON serialiser for PHP5 p php5-ldap - LDAP module for php5 p php5-mapscript - module for php5-cgi to use mapserver p php5-maxdb - PHP extension to access MaxDB databases fo i A php5-mcrypt - MCrypt module for php5 p php5-memcache - memcache extension module for PHP5 p php5-mhash - MHASH module for php5 p php5-ming - Ming module for php5 i A php5-mysql - MySQL module for php5 p php5-odbc - ODBC module for php5 p php5-pgsql - PostgreSQL module for php5 p php5-ps - ps module for PHP 5 p php5-pspell - pspell module for php5 p php5-radius - PECL radius module for PHP 5 p php5-recode - recode module for php5 p php5-snmp - SNMP module for php5 p php5-sqlite - SQLite module for php5 p php5-sqlite3 - SQLite3 module for php5 p php5-sqlrelay - SQL Relay PHP API p php5-suhosin - advanced protection module for php5 p php5-sybase - Sybase / MS SQL Server module for php5 p php5-tidy - tidy module for php5 p php5-uuid - OSSP uuid module for php5 p php5-xapian - Xapian search engine interface for PHP5 p php5-xcache - Fast, stable PHP opcode cacher p php5-xmlrpc - XML-RPC module for php5 p php5-xsl - XSL module for php5 aptitude show php5 | grep Version Version : 5.2.0-8+etch13 aptitude show php5-cgi | grep Version Version : 5.2.0-8+etch13 php5 --version -bash: php5: command not found php-cgi --version PHP 5.2.0-8+etch13 (cgi-fcgi) (built: Oct 2 2008 08:21:17) Copyright (c) 1997-2006 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2006 Zend Technologies

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• IRP_MJ_WRITE latency up to 15 seconds

  - by racitup

  We have written an application that performs small (22kB) writes to multiple files at once (one thread performing asynchronous queued writes to multiple locations on behalf of other threads) on the same local volume (RAID1). 99.9% of the writes are low-latency but occasionally (maybe every minute or two) we get one or two huge latency writes (I have seen 10 seconds and above) without any real explanation. Platform: Win2003 Server with NTFS. Monitoring: Sysinternals Process Monitor (see link below) and our own application logging. We have tried multiple things to try and solve this that have been gleaned from a few websites, e.g.: Making the first part of file names unique to aid 8.3 name generation Writing files to multiple directories Changing Intel Disk Write Caching Windows File/Printer Sharing Minimize memory used Balance Maximize data throughput for file sharing Maximize data throughput for network applications System-Advanced-Performance-Advanced NtfsDisableLastAccessUpdate - use fsutil behavior set disablelastaccess 1 disable 8.3 name generation - use "fsutil behavior set disable8dot3 1" + restart Enable a large size file system cache Disable paging of the kernel code IO Page Lock Limit Turn Off (or On) the Indexing Service But nothing seems to make much difference. There's a whole host of things we haven't tried yet but we wondered if anyone had come across the same problem, a reason and a solution (programmatic or not)? We can reproduce the problem using IOMeter and a simple setup: Start IOMeter and remove all but the first worker thread in 'Topology' using the disconnect button. Select the Worker thread and put a cross in the box next to the disk you want to use in the Disk Targets tab and put '2000000' in Maximum Disk Size (NOTE: must have at least 1GB free space; sector size is 512 bytes) Next create a new access specification and add it to the worker thread: Transfer Request Size = 22kB 100% Sequential Percent of Access Spec = 100% Percent Read/Write = 100% Write Change Results Display Update Frequency to 5 seconds, Test Setup Run Time to 20 seconds and both 'Number of Workers to Spawn Automatically' settings to zero. Select the Worker Thread in the Topology panel and hit the Duplicate Worker button 59 times to create 60 threads with identical settings. Hit the 'Go' button (green flag) and monitor the Results tab. The 'Maximum I/O Response Time (ms)' always hits at least 3500 on our machine. Our machine isn't exactly slow (Xeon 8 core rack server with 4GB and onboard RAID). I'd be interested to see what other people get. We have a feeling it might be something to do with the NTFS filesystem (ours is currently 75% full of fragmented files) and we are going to try a few things around this principle. But it is also related to disk performance since we don't see it on a RAMDisk and it's not as severe on a RAID10 array. Any help is much appreciated. Richard Right-click and select 'Open Link in New Tab': ProcMon Result

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• LaunchDaemon causing Lion to hang on boot

  - by Brett

  I've got a Mac Mini 2011, which I intend to use for a few tasks such as Plex and running a few VM's. I've installed virtualbox, along with XAMPP and phpvirtualbox, which all worked fine. However, getting this to run on startup is proving a real PITA! I'm at the moment trying to get vboxwebsrv running on boot. I've created a launchd plist within /Library/LaunchDaemons to run it and it works fine... well sort of. Lion when booting will show the spinning wheel and stop, never showing a GUI - however if I remote in via screen sharing or SSH, I can login fine and see that vboxwebsrv has launched successfully. Setting this plist to disabled makes lion boot up fine again. Initially I thought it was due to it staying open, so tried to add -b which causes it to run in the background, this just caused launchd to constantly spawn new processes and didn't even fix my problem of Lion being stuck at the spinning wheel. Does anyone have any ideas? I'm losing my mind here! PLIST: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Disabled</key> <false/> <key>KeepAlive</key> <false/> <key>UserName</key> <string>vbox</string> <key>RunAtLoad</key> <true/> <key>OnDemand</key> <false/> <key>Label</key> <string>org.virtualbox.vboxwebsvc</string> <key>ProgramArguments</key> <array> <string>/Applications/VirtualBox.app/Contents/MacOS/vboxwebsrv</string> </array> </dict> </plist>

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• Blank Page: wordpress on nginx+php-fpm

  - by troutwine

  Good day. While this post discusses a similar setup to mine serving blank pages occasionally after having made a successful installation, I am unable to serve anything but blank pages. My setup: Wordpress 3.0.4 nginx 0.8.54 php-fpm 5.3.5 (fpm-fcgi) Arch Linux Configuration Files php-fpm.conf: [global] pid = run/php-fpm/php-fpm.pid error_log = log/php-fpm.log log_level = notice [www] listen = 127.0.0.1:9000 listen.owner = www listen.group = www listen.mode = 0660 user = www group = www pm = dynamic pm.max_children = 50 pm.start_servers = 20 pm.min_spare_servers = 5 pm.max_spare_servers = 35 pm.max_requests = 500 nginx.conf: user www; worker_processes 1; error_log /var/log/nginx/error.log notice; pid /var/run/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; gzip on; include /etc/nginx/sites-enabled/*.conf; } /etc/nginx/sites-enabled/blog_sharonrhodes_us.conf: upstream php { server 127.0.0.1:9000; } server { error_log /var/log/nginx/us/sharonrhodes/blog/error.log notice; access_log /var/log/nginx/us/sharonrhodes/blog/access.log; server_name blog.sharonrhodes.us; root /srv/apps/us/sharonrhodes/blog; index index.php; location = /favicon.ico { log_not_found off; access_log off; } location = /robots.txt { allow all; log_not_found off; access_log off; } location / { # This is cool because no php is touched for static content try_files $uri $uri/ /index.php?q=$uri&$args; } location ~ \.php$ { fastcgi_split_path_info ^(.+\.php)(/.+)$; #NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini include fastcgi_params; fastcgi_intercept_errors on; fastcgi_pass php; } location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ { expires max; log_not_found off; } }

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• Kickstart based installation of RHEL 6.4 from USB

  - by Peter

  I want to setup some brand new servers with RHEL 6.4. Servers do not have DVD, so, I have to use USB for the installation. I already have a custom ISO with a kickstart file that I use on servers with DVD flawlessly. I used iso2usb to move the ISO t? my USB. When I boot from the USB, the ks file is found, anaconda starts, but then stops with the following error: "The installation source given by device ['sda1'] could not be found. Please check your parameters and try again" Notes: The USB IS the sda. My custom ISO file is renamed to linux.iso from iso2usb and it is present in the root directory of the USB. Kickstart file has the following entry: harddrive --partition=sda1 --dir=/ Please help me to automate the installation with kickstart. Edit 1: This the anaconda.log file: 09:01:57,029 INFO : no /etc/zfcp.conf; not configuring zfcp 09:01:57,259 INFO : created new libuser.conf at /tmp/libuser.4rAbps with instPath="/mnt/sysimage" 09:01:57,259 INFO : anaconda called with cmdline = ['/usr/bin/anaconda', '--stage2', 'hd:sda1:///images/install.img', '--dlabel', '--kickstart', '/tmp/ks.cfg', '--graphical', '--selinux', '--lang', 'en_US.UTF-8', '--keymap', 'us', '--repo', 'hd:sda1:/'] 09:01:57,260 INFO : Display mode = g 09:01:57,260 INFO : Default encoding = utf-8 09:01:59,444 DEBUG : X server has signalled a successful start. 09:01:59,446 INFO : Starting window manager, pid 1345. 09:01:59,537 INFO : Starting graphical installation. 09:01:59,741 INFO : Detected 7968M of memory 09:01:59,741 INFO : Swap attempt of 7968M 09:02:00,840 INFO : ISCSID is /usr/sbin/iscsid 09:02:00,840 INFO : no initiator set Edit 2: This is the part of anaconda log that indicates that it found the USB etc: 09:01:47,918 INFO : starting STEP_STAGE2 09:01:47,918 INFO : partition is sda1, dir is //images/install.img 09:01:47,918 INFO : mounting device sda1 for hard drive install 09:01:48,005 INFO : Path to stage2 image is /mnt/isodir///images/install.img 09:01:54,214 INFO : mounted loopback device /mnt/runtime on /dev/loop0 as /tmp/install.img 09:01:54,214 INFO : Looking for updates for HD in /mnt/isodir///images/updates.img 09:01:54,214 INFO : Looking for product for HD in /mnt/isodir///images/product.img 09:01:54,227 INFO : got stage2 at url hd:sda1:///images/install.img 09:01:54,254 INFO : Loading SELinux policy 09:01:54,700 INFO : getting ready to spawn shell now 09:01:54,975 INFO : Running anaconda script /usr/bin/anaconda 09:01:56,882 INFO : _Fedora is the highest priority installclass, using it 09:01:56,921 INFO : Running kickstart %%pre script(s) 09:01:56,922 WARNING : '/bin/sh' specified as full path 09:01:56,926 INFO : All kickstart %%pre script(s) have been run

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• Mongodb: why is my mongo server using two PID's?

  - by Lucas

  I started my mongo with the following command: [lucas@ecoinstance]~/node/nodetest2$ sudo mongod --dbpath /home/lucas/node/nodetest2/data 2014-06-07T08:46:30.507+0000 [initandlisten] MongoDB starting : pid=6409 port=27017 dbpat h=/home/lucas/node/nodetest2/data 64-bit host=ecoinstance 2014-06-07T08:46:30.508+0000 [initandlisten] db version v2.6.1 2014-06-07T08:46:30.508+0000 [initandlisten] git version: 4b95b086d2374bdcfcdf2249272fb55 2c9c726e8 2014-06-07T08:46:30.508+0000 [initandlisten] build info: Linux build14.nj1.10gen.cc 2.6.3 2-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49 2014-06-07T08:46:30.509+0000 [initandlisten] allocator: tcmalloc 2014-06-07T08:46:30.509+0000 [initandlisten] options: { storage: { dbPath: "/home/lucas/n ode/nodetest2/data" } } 2014-06-07T08:46:30.520+0000 [initandlisten] journal dir=/home/lucas/node/nodetest2/data/ journal 2014-06-07T08:46:30.520+0000 [initandlisten] recover : no journal files present, no recov ery needed 2014-06-07T08:46:30.527+0000 [initandlisten] waiting for connections on port 27017 It appears to be working, as I can execute mongo and access the server. However, here are the process running mongo: [lucas@ecoinstance]~/node/testSite$ ps aux | grep mongo root 6540 0.0 0.2 33424 1664 pts/3 S+ 08:52 0:00 sudo mongod --dbpath /ho me/lucas/node/nodetest2/data root 6541 0.6 8.6 522140 52512 pts/3 Sl+ 08:52 0:00 mongod --dbpath /home/lu cas/node/nodetest2/data lucas 6554 0.0 0.1 7836 876 pts/4 S+ 08:52 0:00 grep mongo As you can see, there are two PID's for mongo. Before I ran sudo mongod --dbpath /home/lucas/node/nodetest2/data, there were none (besides the grep of course). How did my command spawn two PID's, and should I be concerned? Any suggestions or tips would be great. Additional Info In addition, I may have other issues that might suggest a cause. I tried running mongo with --fork --logpath /home/lucas..., but it did not work. More information below: [lucas@ecoinstance]~/node/nodetest2$ sudo mongod --dbpath /home/lucas/node/nodetest2/data --fork --logpath /home/lucas/node/nodetest2/data/ about to fork child process, waiting until server is ready for connections. forked process: 6578 ERROR: child process failed, exited with error number 1 [lucas@ecoinstance]~/node/nodetest2$ ls -l data/ total 163852 drwxr-xr-x 2 mongodb nogroup 4096 Jun 7 08:54 journal -rw------- 1 mongodb nogroup 67108864 Jun 7 08:52 local.0 -rw------- 1 mongodb nogroup 16777216 Jun 7 08:52 local.ns -rwxr-xr-x 1 mongodb nogroup 0 Jun 7 08:54 mongod.lock -rw------- 1 mongodb nogroup 67108864 Jun 7 02:08 nodetest1.0 -rw------- 1 mongodb nogroup 16777216 Jun 7 02:08 nodetest1.ns Also, my db path folder is not the original location. It was originally created under the default /var/lib/mongodb/ and moved to my local data folder. This was done after shutting down the server via /etc/init.d/mongod stop. I have a Debian Wheezy server, if it matters.

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• .htaccess template, suggestions needed

  - by purpler

  # Defaults AddDefaultCharset UTF-8 DefaultLanguage en-US FileETag None Header unset ETag ServerSignature Off SetEnv TZ Europe/Belgrade # Rewrites Options +FollowSymLinks RewriteEngine On RewriteBase / # Redirect to WWW RewriteCond %{HTTP_HOST} ^serpentineseo.com RewriteRule (.*) http://www.serpentineseo.com/$1 [R=301,L] # Redirect index to root RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /.*index\.html\ HTTP/ RewriteRule ^(.*)index\.html$ /$1 [R=301,L] # Cache media files: ExpiresActive On ExpiresDefault A0 # Month <filesMatch "\.(gif|jpg|jpeg|png|ico|swf|js)$"> Header set Cache-Control "max-age=2592000, public" </filesMatch> # Week <FilesMatch "\.(css|pdf)$"> Header set Cache-Control "max-age=604800" </FilesMatch> # 10 Min <FilesMatch "\.(html|htm|txt)$"> Header set Cache-Control "max-age=600" </FilesMatch> # Do not cache <FilesMatch "\.(pl|php|cgi|spl|scgi|fcgi)$"> Header unset Cache-Control </FilesMatch> # Compress output <IfModule mod_deflate.c> <FilesMatch "\.(html|js|css)$"> SetOutputFilter DEFLATE </FilesMatch> </IfModule> # Error Documents ErrorDocument 206 /error/206.html ErrorDocument 401 /error/401.html ErrorDocument 403 /error/403.html ErrorDocument 404 /error/404.html ErrorDocument 500 /error/500.html # Prevent hotlinking RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://(www\.)?serpentineseo.com/.*$ [NC] RewriteRule \.(gif|jpg|png)$ http://www.serpentineseo.com/images/angryman.png [R,L] # Prevent offline browsers RewriteCond %{HTTP_USER_AGENT} ^BlackWidow [OR] RewriteCond %{HTTP_USER_AGENT} ^Bot\ mailto:[email protected] [OR] RewriteCond %{HTTP_USER_AGENT} ^ChinaClaw [OR] RewriteCond %{HTTP_USER_AGENT} ^Custo [OR] RewriteCond %{HTTP_USER_AGENT} ^DISCo [OR] RewriteCond %{HTTP_USER_AGENT} ^Download\ Demon [OR] RewriteCond %{HTTP_USER_AGENT} ^eCatch [OR] RewriteCond %{HTTP_USER_AGENT} ^EirGrabber [OR] RewriteCond %{HTTP_USER_AGENT} ^EmailSiphon [OR] RewriteCond %{HTTP_USER_AGENT} ^EmailWolf [OR] RewriteCond %{HTTP_USER_AGENT} ^Express\ WebPictures [OR] RewriteCond %{HTTP_USER_AGENT} ^ExtractorPro [OR] RewriteCond %{HTTP_USER_AGENT} ^EyeNetIE [OR] RewriteCond %{HTTP_USER_AGENT} ^FlashGet [OR] RewriteCond %{HTTP_USER_AGENT} ^GetRight [OR] RewriteCond %{HTTP_USER_AGENT} ^GetWeb! [OR] RewriteCond %{HTTP_USER_AGENT} ^Go!Zilla [OR] RewriteCond %{HTTP_USER_AGENT} ^Go-Ahead-Got-It [OR] RewriteCond %{HTTP_USER_AGENT} ^GrabNet [OR] RewriteCond %{HTTP_USER_AGENT} ^Grafula [OR] RewriteCond %{HTTP_USER_AGENT} ^HMView [OR] RewriteCond %{HTTP_USER_AGENT} HTTrack [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^Image\ Stripper [OR] RewriteCond %{HTTP_USER_AGENT} ^Image\ Sucker [OR] RewriteCond %{HTTP_USER_AGENT} Indy\ Library [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^InterGET [OR] RewriteCond %{HTTP_USER_AGENT} ^Internet\ Ninja [OR] RewriteCond %{HTTP_USER_AGENT} ^JetCar [OR] RewriteCond %{HTTP_USER_AGENT} ^JOC\ Web\ Spider [OR] RewriteCond %{HTTP_USER_AGENT} ^larbin [OR] RewriteCond %{HTTP_USER_AGENT} ^LeechFTP [OR] RewriteCond %{HTTP_USER_AGENT} ^Mass\ Downloader [OR] RewriteCond %{HTTP_USER_AGENT} ^MIDown\ tool [OR] RewriteCond %{HTTP_USER_AGENT} ^Mister\ PiX [OR] RewriteCond %{HTTP_USER_AGENT} ^Navroad [OR] RewriteCond %{HTTP_USER_AGENT} ^NearSite [OR] RewriteCond %{HTTP_USER_AGENT} ^NetAnts [OR] RewriteCond %{HTTP_USER_AGENT} ^NetSpider [OR] RewriteCond %{HTTP_USER_AGENT} ^Net\ Vampire [OR] RewriteCond %{HTTP_USER_AGENT} ^NetZIP [OR] RewriteCond %{HTTP_USER_AGENT} ^Octopus [OR] RewriteCond %{HTTP_USER_AGENT} ^Offline\ Explorer [OR] RewriteCond %{HTTP_USER_AGENT} ^Offline\ Navigator [OR] RewriteCond %{HTTP_USER_AGENT} ^PageGrabber [OR] RewriteCond %{HTTP_USER_AGENT} ^Papa\ Foto [OR] RewriteCond %{HTTP_USER_AGENT} ^pavuk [OR] RewriteCond %{HTTP_USER_AGENT} ^pcBrowser [OR] RewriteCond %{HTTP_USER_AGENT} ^RealDownload [OR] RewriteCond %{HTTP_USER_AGENT} ^ReGet [OR] RewriteCond %{HTTP_USER_AGENT} ^SiteSnagger [OR] RewriteCond %{HTTP_USER_AGENT} ^SmartDownload [OR] RewriteCond %{HTTP_USER_AGENT} ^SuperBot [OR] RewriteCond %{HTTP_USER_AGENT} ^SuperHTTP [OR] RewriteCond %{HTTP_USER_AGENT} ^Surfbot [OR] RewriteCond %{HTTP_USER_AGENT} ^tAkeOut [OR] RewriteCond %{HTTP_USER_AGENT} ^Teleport\ Pro [OR] RewriteCond %{HTTP_USER_AGENT} ^VoidEYE [OR] RewriteCond %{HTTP_USER_AGENT} ^Web\ Image\ Collector [OR] RewriteCond %{HTTP_USER_AGENT} ^Web\ Sucker [OR] RewriteCond %{HTTP_USER_AGENT} ^WebAuto [OR] RewriteCond %{HTTP_USER_AGENT} ^WebCopier [OR] RewriteCond %{HTTP_USER_AGENT} ^WebFetch [OR] RewriteCond %{HTTP_USER_AGENT} ^WebGo\ IS [OR] RewriteCond %{HTTP_USER_AGENT} ^WebLeacher [OR] RewriteCond %{HTTP_USER_AGENT} ^WebReaper [OR] RewriteCond %{HTTP_USER_AGENT} ^WebSauger [OR] RewriteCond %{HTTP_USER_AGENT} ^Website\ eXtractor [OR] RewriteCond %{HTTP_USER_AGENT} ^Website\ Quester [OR] RewriteCond %{HTTP_USER_AGENT} ^WebStripper [OR] RewriteCond %{HTTP_USER_AGENT} ^WebWhacker [OR] RewriteCond %{HTTP_USER_AGENT} ^WebZIP [OR] RewriteCond %{HTTP_USER_AGENT} ^Wget [OR] RewriteCond %{HTTP_USER_AGENT} ^Widow [OR] RewriteCond %{HTTP_USER_AGENT} ^WWWOFFLE [OR] RewriteCond %{HTTP_USER_AGENT} ^Xaldon\ WebSpider [OR] RewriteCond %{HTTP_USER_AGENT} ^Zeus RewriteRule ^.*$ http://www.google.com [R,L] # Protect against DOS attacks by limiting file upload size LimitRequestBody 10240000 # Deny access to sensitive files <FilesMatch "\.(htaccess|psd|log)$"> Order Allow,Deny Deny from all </FilesMatch>

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• Trouble with Debian Lenny and Sphinx

  - by Ando

  I've very basic understanding of linux systems, but I've a server which was setup a while ago to host some web apps. Recently I decided to test out and implement Sphinx but unfortunately I cant get the install to work. I'm running a Debian Lenny distro and when I try to install sphinx it says - checking MySQL include files... configure: error: missing include files. ****************************************************************************** ERROR: cannot find MySQL include files. Check that you do have MySQL include files installed. The package name is typically 'mysql-devel'. If include files are installed on your system, but you are still getting this message, you should do one of the following: 1) either specify includes location explicitly, using --with-mysql-includes; 2) or specify MySQL installation root location explicitly, using --with-mysql; 3) or make sure that the path to 'mysql_config' program is listed in your PATH environment variable. To disable MySQL support, use --without-mysql option. ****************************************************************************** I do have mysql 5.1 installed but I can't find the include files, AND one more thing.. I read around the net that I probably need libmysqlclient15-dev but when I try to install that using apt-get i receive the following error. The following packages were automatically installed and are no longer required: libxcb-aux0 libts-0.0-0 libxcb-atom1 ttf-dejavu-extra hunspell-en-us g++-4.3 libmysql++3 libnspr4-0d libdirectfb-1.0-0 libxcb-event1 libasound2 libstdc++6-4.3-dev libhunspell-1.2-0 ttf-dejavu libmozjs2d conkeror-spawn-process-helper libnss3-1d Use 'apt-get autoremove' to remove them. The following NEW packages will be installed: libmysqlclient15-dev 0 upgraded, 1 newly installed, 0 to remove and 276 not upgraded. Need to get 7590 kB of archives. After this operation, 26.3 MB of additional disk space will be used. WARNING: The following packages cannot be authenticated! libmysqlclient15-dev Install these packages without verification [y/N]? Y Err http://ftp.us.debian.org/debian/ lenny/main libmysqlclient15-dev amd64 5.0.51a-24+lenny5 404 Not Found [IP: 35.9.37.225 80] Err http://security.debian.org/ lenny/updates/main libmysqlclient15-dev amd64 5.0.51a-24+lenny5 404 Not Found [IP: 149.20.20.6 80] Failed to fetch http://security.debian.org/pool/updates/main/m/mysql-dfsg-5.0/libmysqlclient15-dev_5.0.51a-24+lenny5_amd64.deb 404 Not Found [IP: 149.20.20.6 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Can you help me out by suggesting how to install the required packages and run the Sphinx.

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• .htaccess template, suggestions needed

  - by purpler

  DefaultLanguage en-US FileETag None Header unset ETag ServerSignature Off SetEnv TZ Europe/Belgrade # Rewrites Options +FollowSymLinks RewriteEngine On RewriteBase / # Redirect to WWW RewriteCond %{HTTP_HOST} ^serpentineseo.com RewriteRule (.*) http://www.serpentineseo.com/$1 [R=301,L] # Redirect index to root RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /.*index\.html\ HTTP/ RewriteRule ^(.*)index\.html$ /$1 [R=301,L] # Cache media files: ExpiresActive On ExpiresDefault A0 # Month <filesMatch "\.(gif|jpg|jpeg|png|ico|swf|js)$"> Header set Cache-Control "max-age=2592000, public" </filesMatch> # Week <FilesMatch "\.(css|pdf)$"> Header set Cache-Control "max-age=604800" </FilesMatch> # 10 Min <FilesMatch "\.(html|htm|txt)$"> Header set Cache-Control "max-age=600" </FilesMatch> # Do not cache <FilesMatch "\.(pl|php|cgi|spl|scgi|fcgi)$"> Header unset Cache-Control </FilesMatch> # Compress output <IfModule mod_deflate.c> <FilesMatch "\.(html|js|css)$"> SetOutputFilter DEFLATE </FilesMatch> </IfModule> # Error Documents ErrorDocument 206 /error/206.html ErrorDocument 401 /error/401.html ErrorDocument 403 /error/403.html ErrorDocument 404 /error/404.html ErrorDocument 500 /error/500.html # Prevent hotlinking RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://(www\.)?serpentineseo.com/.*$ [NC] RewriteRule \.(gif|jpg|png)$ http://www.serpentineseo.com/images/angryman.png [R,L] # Prevent offline browsers RewriteCond %{HTTP_USER_AGENT} ^BlackWidow [OR] RewriteCond %{HTTP_USER_AGENT} ^Bot\ mailto:[email protected] [OR] RewriteCond %{HTTP_USER_AGENT} ^ChinaClaw [OR] RewriteCond %{HTTP_USER_AGENT} ^Custo [OR] RewriteCond %{HTTP_USER_AGENT} ^DISCo [OR] RewriteCond %{HTTP_USER_AGENT} ^Download\ Demon [OR] RewriteCond %{HTTP_USER_AGENT} ^eCatch [OR] RewriteCond %{HTTP_USER_AGENT} ^EirGrabber [OR] RewriteCond %{HTTP_USER_AGENT} ^EmailSiphon [OR] RewriteCond %{HTTP_USER_AGENT} ^EmailWolf [OR] RewriteCond %{HTTP_USER_AGENT} ^Express\ WebPictures [OR] RewriteCond %{HTTP_USER_AGENT} ^ExtractorPro [OR] RewriteCond %{HTTP_USER_AGENT} ^EyeNetIE [OR] RewriteCond %{HTTP_USER_AGENT} ^FlashGet [OR] RewriteCond %{HTTP_USER_AGENT} ^GetRight [OR] RewriteCond %{HTTP_USER_AGENT} ^GetWeb! [OR] RewriteCond %{HTTP_USER_AGENT} ^Go!Zilla [OR] RewriteCond %{HTTP_USER_AGENT} ^Go-Ahead-Got-It [OR] RewriteCond %{HTTP_USER_AGENT} ^GrabNet [OR] RewriteCond %{HTTP_USER_AGENT} ^Grafula [OR] RewriteCond %{HTTP_USER_AGENT} ^HMView [OR] RewriteCond %{HTTP_USER_AGENT} HTTrack [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^Image\ Stripper [OR] RewriteCond %{HTTP_USER_AGENT} ^Image\ Sucker [OR] RewriteCond %{HTTP_USER_AGENT} Indy\ Library [NC,OR] RewriteCond %{HTTP_USER_AGENT} ^InterGET [OR] RewriteCond %{HTTP_USER_AGENT} ^Internet\ Ninja [OR] RewriteCond %{HTTP_USER_AGENT} ^JetCar [OR] RewriteCond %{HTTP_USER_AGENT} ^JOC\ Web\ Spider [OR] RewriteCond %{HTTP_USER_AGENT} ^larbin [OR] RewriteCond %{HTTP_USER_AGENT} ^LeechFTP [OR] RewriteCond %{HTTP_USER_AGENT} ^Mass\ Downloader [OR] RewriteCond %{HTTP_USER_AGENT} ^MIDown\ tool [OR] RewriteCond %{HTTP_USER_AGENT} ^Mister\ PiX [OR] RewriteCond %{HTTP_USER_AGENT} ^Navroad [OR] RewriteCond %{HTTP_USER_AGENT} ^NearSite [OR] RewriteCond %{HTTP_USER_AGENT} ^NetAnts [OR] RewriteCond %{HTTP_USER_AGENT} ^NetSpider [OR] RewriteCond %{HTTP_USER_AGENT} ^Net\ Vampire [OR] RewriteCond %{HTTP_USER_AGENT} ^NetZIP [OR] RewriteCond %{HTTP_USER_AGENT} ^Octopus [OR] RewriteCond %{HTTP_USER_AGENT} ^Offline\ Explorer [OR] RewriteCond %{HTTP_USER_AGENT} ^Offline\ Navigator [OR] RewriteCond %{HTTP_USER_AGENT} ^PageGrabber [OR] RewriteCond %{HTTP_USER_AGENT} ^Papa\ Foto [OR] RewriteCond %{HTTP_USER_AGENT} ^pavuk [OR] RewriteCond %{HTTP_USER_AGENT} ^pcBrowser [OR] RewriteCond %{HTTP_USER_AGENT} ^RealDownload [OR] RewriteCond %{HTTP_USER_AGENT} ^ReGet [OR] RewriteCond %{HTTP_USER_AGENT} ^SiteSnagger [OR] RewriteCond %{HTTP_USER_AGENT} ^SmartDownload [OR] RewriteCond %{HTTP_USER_AGENT} ^SuperBot [OR] RewriteCond %{HTTP_USER_AGENT} ^SuperHTTP [OR] RewriteCond %{HTTP_USER_AGENT} ^Surfbot [OR] RewriteCond %{HTTP_USER_AGENT} ^tAkeOut [OR] RewriteCond %{HTTP_USER_AGENT} ^Teleport\ Pro [OR] RewriteCond %{HTTP_USER_AGENT} ^VoidEYE [OR] RewriteCond %{HTTP_USER_AGENT} ^Web\ Image\ Collector [OR] RewriteCond %{HTTP_USER_AGENT} ^Web\ Sucker [OR] RewriteCond %{HTTP_USER_AGENT} ^WebAuto [OR] RewriteCond %{HTTP_USER_AGENT} ^WebCopier [OR] RewriteCond %{HTTP_USER_AGENT} ^WebFetch [OR] RewriteCond %{HTTP_USER_AGENT} ^WebGo\ IS [OR] RewriteCond %{HTTP_USER_AGENT} ^WebLeacher [OR] RewriteCond %{HTTP_USER_AGENT} ^WebReaper [OR] RewriteCond %{HTTP_USER_AGENT} ^WebSauger [OR] RewriteCond %{HTTP_USER_AGENT} ^Website\ eXtractor [OR] RewriteCond %{HTTP_USER_AGENT} ^Website\ Quester [OR] RewriteCond %{HTTP_USER_AGENT} ^WebStripper [OR] RewriteCond %{HTTP_USER_AGENT} ^WebWhacker [OR] RewriteCond %{HTTP_USER_AGENT} ^WebZIP [OR] RewriteCond %{HTTP_USER_AGENT} ^Wget [OR] RewriteCond %{HTTP_USER_AGENT} ^Widow [OR] RewriteCond %{HTTP_USER_AGENT} ^WWWOFFLE [OR] RewriteCond %{HTTP_USER_AGENT} ^Xaldon\ WebSpider [OR] RewriteCond %{HTTP_USER_AGENT} ^Zeus RewriteRule ^.*$ http://www.google.com [R,L] # Protect against DOS attacks by limiting file upload size LimitRequestBody 10240000 # Deny access to sensitive files <FilesMatch "\.(htaccess|psd|log)$"> Order Allow,Deny Deny from all </FilesMatch>

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• After compiling PHP, I get mod_fcgid: error reading data from FastCGI server

  - by user34295

  I'm trying to add multiple PHP version in Plesk 12. Switching my domain to the new version PHP 5.4.29 result in this error: (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server Here is phpinfo() of the complied PHP version, obtained running php54-cgi index.php from the terminal. The same script placed under document root doesn't work in FastCGI. How can I debug/try to figure out what's the error? Currently running CentOS 6.5 x64, Plesk v12.0.18_build1200140529.2, PHP 5.5.13. I've downloaded PHP 5.4.29: cd /usr/local/src curl -O http://it1.php.net/distributions/php-5.4.29.tar.gz cd php-5.4.29 And configured with: ./configure \ --prefix=/usr/local/php54 \ --with-bz2 \ --with-config-file-path=/usr/local/php54/etc \ --with-config-file-scan-dir=/usr/local/php54/etc/php.d \ --with-curl \ --with-gd \ --with-gettext \ --with-iconv \ --with-layout=PHP \ --with-libxml-dir=/usr/local/php54 \ --with-mhash \ --with-mysql=mysqlnd \ --with-mysqli=mysqlnd \ --with-openssl \ --with-pdo-mysql=mysqlnd \ --with-readline \ --with-xsl \ --with-zlib \ --enable-calendar \ --enable-cgi \ --enable-exif \ --enable-ftp \ --enable-intl \ --enable-mbstring \ --enable-pcntl \ --enable-shmop \ --enable-sockets \ --enable-sockets \ --enable-sysvmsg \ --enable-sysvsem \ --enable-sysvshm \ --enable-wddx \ --enable-zip Then: make && make install Installing PHP CLI binary: /usr/local/php54/bin/ Installing PHP CLI man page: /usr/local/php54/php/man/man1/ Installing PHP CGI binary: /usr/local/php54/bin/ Installing PHP CGI man page: /usr/local/php54/php/man/man1/ Installing build environment: /usr/local/php54/lib/php/build/ Installing header files: /usr/local/php54/include/php/ Installing helper programs: /usr/local/php54/bin/ program: phpize program: php-config Installing man pages: /usr/local/php54/php/man/man1/ page: phpize.1 page: php-config.1 Installing PEAR environment: /usr/local/php54/lib/php/ [PEAR] Archive_Tar - installed: 1.3.11 [PEAR] Console_Getopt - installed: 1.3.1 warning: pear/PEAR requires package "pear/Structures_Graph" (recommended version 1.0.4) warning: pear/PEAR requires package "pear/XML_Util" (recommended version 1.2.1) [PEAR] PEAR - installed: 1.9.4 Wrote PEAR system config file at: /usr/local/php54/etc/pear.conf You may want to add: /usr/local/php54/lib/php to your php.ini include_path [PEAR] Structures_Graph- installed: 1.0.4 [PEAR] XML_Util - installed: 1.2.1 /usr/local/src/php-5.4.29/build/shtool install -c ext/phar/phar.phar /usr/local/php54/bin ln -s -f /usr/local/php54/bin/phar.phar /usr/local/php54/bin/phar Installing PDO headers: /usr/local/php54/include/php/ext/pdo/ Copied php.ini-production to /usr/local/php54/etc/php.ini and added a new handler in Plesk: /usr/local/psa/bin/php_handler --add -displayname 5.4.29 -path /usr/local/php54/bin/php-cgi -phpini /usr/local/php54/etc/php.ini -type fastcgi -id php54 Symbolic linking: ln -s /usr/local/php54/bin/php /usr/local/bin/php54 ln -s /usr/local/php54/bin/php-cgi /usr/local/bin/php54-cgi New installed version: php54-cgi -m [PHP Modules] bz2 calendar cgi-fcgi Core ctype curl date dom ereg exif fileinfo filter ftp gd gettext hash iconv intl json libxml mbstring mhash mysql mysqli mysqlnd openssl pcntl pcre PDO pdo_mysql pdo_sqlite Phar posix readline Reflection session shmop SimpleXML sockets SPL sqlite3 standard sysvmsg sysvsem sysvshm tokenizer wddx xml xmlreader xmlwriter xsl zip zlib [Zend Modules]

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• How to get more information from the system crash

  - by viraptor

  I'd like to debug an issue I'm having with a linux (debian stable) server, but I'm running out of ideas of how to confirm any diagnosis. Some background: The servers are running DL160 class with hardware raid between two disks. They're running a lot of services, mostly utilising network interface and CPU. There are 8 cpus and 7 "main" most cpu-hungry processes are bound to one core each via cpu affinity. Other random background scripts are not forced anywhere. The filesystem is writing ~1.5k blocks/s the whole time (goes up above 2k/s in peak times). Normal CPU usage for those servers is ~60% on 7 cores and some minimal usage on the last (whatever's running on shells usually). What actually happens is that the "main" services start using 100% CPU at some point, mainly stuck in kernel time. After a couple of seconds, LA goes over 400 and we lose any way to connect to the box (KVM is on it's way, but not there yet). Sometimes we see a kernel reporting hung task (but not always): [118951.272884] INFO: task zsh:15911 blocked for more than 120 seconds. [118951.272955] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [118951.273037] zsh D 0000000000000000 0 15911 1 [118951.273093] ffff8101898c3c48 0000000000000046 0000000000000000 ffffffffa0155e0a [118951.273183] ffff8101a753a080 ffff81021f1c5570 ffff8101a753a308 000000051f0fd740 [118951.273274] 0000000000000246 0000000000000000 00000000ffffffbd 0000000000000001 [118951.273335] Call Trace: [118951.273424] [<ffffffffa0155e0a>] :ext3:__ext3_journal_dirty_metadata+0x1e/0x46 [118951.273510] [<ffffffff804294f6>] schedule_timeout+0x1e/0xad [118951.273563] [<ffffffff8027577c>] __pagevec_free+0x21/0x2e [118951.273613] [<ffffffff80428b0b>] wait_for_common+0xcf/0x13a [118951.273692] [<ffffffff8022c168>] default_wake_function+0x0/0xe .... This would point at raid / disk failure, however sometimes the tasks are hung on kernel's gettsc which would indicate some general weird hardware behaviour. It's also running mysql (almost read-only, 99% cache hit), which seems to spawn a lot more threads during the system problems. During the day it does ~200kq/s (selects) and ~10q/s (writes). The host is never running out of memory or swapping, no oom reports are spotted. We've got many boxes with similar/same hardware and they all seem to behave that way, but I'm not sure which part fails, so it's probably not a good idea to just grab something more powerful and hope the problem goes away. Applications themselves don't really report anything wrong when they're running. I can run anything safely on the same hardware in an isolated environment. What can I do to narrow down the problem? Where else should I look for explanation?

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• Apache server completely freezes until it gets restarted

  - by nbv4

  My server does this every few days. What sucks is that it always seems to do this right after I go to bed, so when I wake up, I'm greeted with the fact that my server has been down for the past 6 or 7 hours. When I first noticed this, I added a cronjob that tries to restart the server every 15 minutes, but I guess that didn't fix it. Once I noticed the server was down, I can this command: /etc/init.d/apache2 restart * Restarting web server apache2 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName ... waiting ...........................................................apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName httpd (pid 17597) already running ...which is odd, because a restart should restart the server, even if it's already running, correct? I eventually had to "stop" then "start" to get it working again. I then looked through the logs, and found something very weird. It seems that around the time the server crashed, the logs have entries that are wildly out of order. It looks a little like this: xx.xxx.xxx.x - - [21/Apr/2010:06:32:05 -0400] "GET / blah" xx.xxx.xxx.x - - [21/Apr/2010:06:51:25 -0400] "GET / blah" x.xx.xxx.xxx - - [21/Apr/2010:06:38:23 -0400] "GET / blah" xxx.xx.xx.xx - - [21/Apr/2010:06:31:56 -0400] "GET / blah" xxx.xx.xx.xx - - [21/Apr/2010:06:51:49 -0400] "GET / blah" xx.xx.xxx.xx - - [21/Apr/2010:06:33:20 -0400] "GET / blah" I don't think the problem is memory, because this: tells me that right before the crash, memory usage is fine. I'm running apache with the worker mpm, here are the settings for that: <IfModule mpm_worker_module> StartServers 1 MaxClients 100 MinSpareThreads 5 MaxSpareThreads 10 ThreadsPerChild 10 MaxRequestsPerChild 3000 </IfModule> This apache server is running a bunch of stuff, but most of the traffic comes from a django project I'm hosting, that uses mod_wsgi. There also is a simple machines forum that is running off of mod_fcgid. Those setting are below: <IfModule mod_fcgid.c> MaxRequestsPerProcess 500 MaxProcessCount 3 AddHandler fcgid-script .php .fcgi AddHandler cgi-script .cgi .pl FCGIWrapper "/usr/bin/php-cgi" .php </IfModule> Anyone know of anything else I can check? I've just about tweaked every single setting I can think of, yet these freezes still happen.

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• Postfix flow/hook reference, or high-level overview?

  - by threecheeseopera

  The Postfix MTA consists of several components/services that work together to perform the different stages of delivery and receipt of mail; these include the smtp daemon, the pickup and cleanup processes, the queue manager, the smtp service, pipe/spawn/virtual/rewrite ... and others (including the possibility of custom components). Postfix also provides several types of hooks that allow it to integrate with external software, such as policy servers, filters, bounce handlers, loggers, and authentication mechanisms; these hooks can be connected to different components/stages of the delivery process, and can communicate via (at least) IPC, network, database, several types of flat files, or a predefined protocol (e.g. milter). An old and very limited example of this is shown at this page. My question: Does anyone have access to a resource that describes these hooks, the components/delivery stages that the hook can interact with, and the supported communication methods? Or, more likely, documentation of the various Postfix components and the hooks/methods that they support? For example: Given the requirement "if the recipient primary MX server matches 'shadysmtpd', check the recipient address against a list; if there is a match, terminate the SMTP connection without notice". My software would need to 1) integrate into the proper part of the SMTP process, 2) use some method to perform the address check (TCP map server? regular expressions? mysql?), and 3) implement the required action (connection termination). Additionally, there will probably be several methods to accomplish this, and another requirement would be to find that which best fits (ex: a network server might be faster than a flat-file lookup; or, if a large volume of mail might be affected by this check, it should be performed as early in the mail process as possible). Real-world example: The apolicy policy server (performs checks on addresses according to user-defined rules) is designed as a standalone TCP server that hooks into Postfix inside the smtpd component via the directive 'check_policy_service inet:127.0.0.1:10001' in the 'smtpd_client_restrictions' configuration option. This means that, when Postfix first receives an item of mail to be delivered, it will create a TCP connection to the policy server address:port for the purpose of determining if the client is allowed to send mail from this server (in addition to whatever other restrictions / restriction lookup methods are defined in that option); the proper action will be taken based on the server's response. Notes: 1)The Postfix architecture page describes some of this information in ascii art; what I am hoping for is distilled, condensed, reference material. 2) Please correct me if I am wrong on any level; there is a mountain of material, and I am just one man ;) Thanks!

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• Setting font size of Closed Captions on iPhone using ffmpeg or mencoder

  - by forthrin

  Does anyone know how to either: Make ffmpeg set subtitle font size in the output video file Make mencoder produce an iPhone-compatible video file (with subtitles) I finally found out how to get Closed Captions video on iPhone, with mkv and srt files as source material. The secret was using the mov_text subtitle codec in ffmpeg (and turning on Closed Captions in the iPhone settings of course): ffmpeg -y -i in.mkv -i in.srt -map 0:0 -map 0:1 -map 1:0 -vcodec copy -acodec aac -ab 256k -scodec mov_text -strict -2 -metadata title="Title" -metadata:s:s:0 language=eng out.mp4 However, the font size appears very small on the iPhone, and I can't find out how to set it with ffmpeg (the iPhone has no option for this). I found out that mencoder has a -subfont-text-scale option, but I don't have a lot of experience with this program. The following, my best attempt so far, produces an output file which is not playable on the iPhone. sudo port install mplayer +mencoder_extras +osd mencoder in.mkv -sub in.srt -o out.mp4 -ovc copy -oac faac -faacopts br=256:mpeg=4:object=2 -channels 2 -srate 48000 -subfont-text-scale 10 -of lavf -lavfopts format=mp4 PS! As requested, here is the output from mencoder: 192 audio & 400 video codecs success: format: 0 data: 0x0 - 0xb64b9d2f libavformat version 54.6.101 (internal) libavformat file format detected. [matroska,webm @ 0x1015c9a50]Unknown entry 0x80 [lavf] stream 0: video (h264), -vid 0 [lavf] stream 1: audio (ac3), -aid 0, -alang eng VIDEO: [H264] 1280x544 0bpp 49.894 fps 0.0 kbps ( 0.0 kbyte/s) [V] filefmt:44 fourcc:0x34363248 size:1280x544 fps:49.894 ftime:=0.0200 ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders libavcodec version 54.23.100 (internal) AUDIO: 48000 Hz, 2 ch, s16le, 448.0 kbit/29.17% (ratio: 56000->192000) Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3) ========================================================================== ** MUXER_LAVF ***************************************************************** REMEMBER: MEncoder's libavformat muxing is presently broken and can generate INCORRECT files in the presence of B-frames. Moreover, due to bugs MPlayer will play these INCORRECT files as if nothing were wrong! ******************************************************************************* OK, exit. videocodec: framecopy (1280x544 0bpp fourcc=34363248) VIDEO CODEC ID: 28 AUDIO CODEC ID: 15002, TAG: 0 Writing header... [mp4 @ 0x1015c9a50]Codec for stream 0 does not use global headers but container format requires global headers [mp4 @ 0x1015c9a50]Codec for stream 1 does not use global headers but container format requires global headers Then the following repeats itself for every frame: Pos: 0.0s 1f ( 2%) 0.00fps Trem: 0min 0mb A-V:0.000 [0:0] [mp4 @ 0x1015c9a50]malformated aac bitstream, use -absf aac_adtstoasc Error while writing frame. I recognize -absf aac_adtstoasc as an ffmpeg option (does mencoder spawn ffmpeg?), but I don't know how to pass this option on (my hunch is this is not even the origin of the problem).

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• NGiNX performance degrades over time.

  - by Rylea Stark

  So here's the situation, I run a small cluster, Dedicated box for MySQL, and a dedicated PHP-FPM/NGINX box, Nginx talks to php-fpm via socket, As far as i can tell the problem does not lie in php-fpm, it lies somewhere in my configuration. What happens, is the site loads instant for a few moments after starting and slowly starts to degrade to load times of greater than 2 seconds, eventually taking 12 seconds to complete a load, PHP is configured to close a child after 175 requests, and spawn 20 at start and have a max of 60. Not really sure where the bottle neck is, most of my code is optimized and works flawlessly, but these issues with nginx will most likely force me to switch back over to Apache, And I really dont want to do that, NGINX.conf configuration below. user www-data; worker_processes 4; worker_cpu_affinity 0001 0010 0100 1000; error_log /var/log/nginx/error.log; pid /var/run/nginx.pid; events { worker_connections 512; multi_accept on; use epoll; } http { include /etc/nginx/mime.types; access_log /var/log/nginx/access.log; resolver_timeout 5s; satisfy all; ## Size Limits limit_zone brainbug $binary_remote_addr 5m; client_body_buffer_size 8k; client_header_buffer_size 75M; client_max_body_size 1k; large_client_header_buffers 2 1k; ## Timeouts client_body_timeout 60; client_header_timeout 60; keepalive_timeout 60; send_timeout 60; ## General Options ignore_invalid_headers on; recursive_error_pages on; sendfile on; server_name_in_redirect off; server_tokens off; ## TCP options tcp_nodelay on; #tcp_nopush on; output_buffers 128 512k; gzip on; gzip_http_version 1.0; gzip_comp_level 7; gzip_proxied any; gzip_min_length 0; gzip_buffers 32 32k; gzip_types text/plain text/html text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript image/jpeg image/png image/gif; ## Disable GZIP for MSIE 1-6 gzip_disable "MSIE [1-6].(?!.*SV1)"; ## Set a vary header so downstream proxies don't send cached gzipped content to IE6 gzip_vary on; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; }

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• startup Error for Zend Server CE

  - by Jamison

  Hello! I've got a strange startup error for Zend Server CE - it's probably easy to fix, but I don't have much experience with Zend Server! I'm running the latest OSX 10.6.6 and the latest Zend Server CE for Mac. When I run the "start" command from the command line, here is what I get: /usr/local/zend/bin/apachectl start [OK] spawn-fcgi: child spawned successfully: PID: 4206 /usr/local/zend/bin/shell_functions.rc: line 133: 4210 Bus error $WATCHDOG -i $BINARY 1>&3 2>&4 /usr/local/zend/bin/shell_functions.rc: line 133: 4211 Bus error $WATCHDOG -u $WD_UID -g $WD_GID -s $BINARY 1>&3 2>&4 Starting Zend Server GUI [Lighttpd] [FAILED] /usr/local/zend/bin/lighttpdctl.sh: line 46: 4212 Bus error $WATCHDOG -i $BINARY Starting MySQL SUCCESS! /usr/local/zend/bin/shell_functions.rc: line 133: 4304 Bus error $WATCHDOG -i $BINARY 1>&3 2>&4 /usr/local/zend/bin/shell_functions.rc: line 133: 4425 Bus error $WATCHDOG -u $WD_UID -g $WD_GID -s $BINARY 1>&3 2>&4 Starting Java bridge [FAILED] /usr/local/zend/bin/java_bridge.sh: line 39: 4426 Bus error $WATCHDOG -i $BINARY Zend Server started... The challenge is that ZEND SERVER wont open the GUI with this error, and seemingly I can click on Zend Server in the Applications folder and it opens for a second and immediately closes. I've made sure that Web Sharing is turned off to avoid conflicts, and I've run Disk Utility from my recovery disk to make sure there are no file system errors. Here is what the lines that are referenced in the errors have in terms of code: shell_functions.rc: (starting on line 132 - the error message says line 133...): launch() { if [ -z "$DEBUG" ]; then exec 3>/dev/null 4>&3 else exec 3>&1 4>&2 fi $WATCHDOG -i $BINARY 1>&3 2>&4 RET=$? if [ $RET -eq 0 ];then $ECHO_CMD "$BINARY watchdog is up and running.. ${OK_COLOR}[OK]${T_RESET}" return $RET else #$WATCHDOG -u $WD_UID -g $WD_GID -s $BINARY >> "$PREFIX/logs/watchdog_$BINARY.log" 2>&1 $WATCHDOG -u $WD_UID -g $WD_GID -s $BINARY 1>&3 2>&4 report $? "Starting" fi } _kill() { $WATCHDOG -i $BINARY > /dev/null 2>&1 if [ $? -eq 1 ];then $ECHO_CMD "$BINARY is not running" else $WATCHDOG -t $BINARY > /dev/null 2>&1 report $? "Stopping" fi } lighttpdctl.sh: (starting on line 45 - the error message says line 46...): status() { $WATCHDOG -i $BINARY } case "$1" in start) start status ;; stop) stop ;; restart) stop sleep 1 start ;; status) status ;; *) usage exit 1 esac exit $? java_bridge.sh: (starting on line 38 - the error message says line 39...): status() { $WATCHDOG -i $BINARY } Question: "Watchdog" is library in this zend BIN folder - it seems to handle error reporting? all the errors in my start command seem to deal with this Watchdog thing, but I don't know what to do about it... Thanks!

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• Nginx reverse proxy with separate aliases

  - by gabeDel

  Interesting question I have this python code: import sys, bottle, gevent from bottle import * from gevent import * from gevent.wsgi import WSGIServer @route("/") def index(): yield "/" application=bottle.default_app() WSGIServer(('', port), application, spawn=None).serve_forever() that runs standalone with nignx infront of it as a reverse proxy. Now each of these pieces of code run separately but I run multiple of these per domain per project(directory) but the code thinks for some reason that it is top level and its not so when you go to mydomain.com/something it works but if you go to mydomain.com/something/ you will get an error. No I have tested and figured out that nginx is stripping the "something" from the request/query so that when you go to mydomain.com/something/ the code thinks you are going to mydomain.com// how do I get nginx to stop removing this information? Nginx site code: upstream mydomain { server 127.0.0.1:10100 max_fails=5 fail_timeout=10s; } upstream subdirectory { server 127.0.0.1:10199 max_fails=5 fail_timeout=10s; } server { listen 80; server_name mydomain.com; access_log /var/log/nginx/access.log; location /sub { proxy_pass http://subdirectory/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } location /subdir { proxy_pass http://subdirectory/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } }

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• Commercial Drupal Modules & Themes

  - by Ravish

  A discussion at Drupal.org forums prompted me to give my input about commercial ecosystem around Open Source Content Management Systems. WordPress and Joomla have been growing rapidly since past few years. But, growth rate of Drupal seems to be almost flat. Despite being the most powerful CMS around, Drupal is still not being adopted by masses. Many people will argue that Drupal is not targeted towards masses, but developers. I agree, Drupal is more of a development platform than a consumer CMS. Drupal is ‘many things to many people’, and I can build almost any type of website with it. Drupal is being used for building blogs, corporate websites, Intranet portals, social networking and even a project management system. Looking at the wide array of Drupal implementations, it deserves to be the most widely adopted CMS. I believe there are few challenges that Drupal community needs to overcome. To understand these challenges, I surveyed some webmasters who use Joomla or WordPress but not Drupal. I asked them why they don’t want to use Drupal, following are the responses I got from them: Drupal is too complicated, takes time to learn. Drupal is great, but its admin panel is overwhelming. I couldn’t find any nice themes for Drupal. There is no WYSIWYG editor in Drupal. Most Drupal modules do not work out of the box. There aren’t enough modules like Ubercart which provides any out of the box functionality. I tried modules like CCK, Views and Panels. After wasting several hours struggling with them, I decided to give up on Drupal. I don’t use Drupal because of pushbutton and Garland theme. I had hard time trying to customize Garland and it messed up the whole layout. There are no premium modules and themes for Drupal. Joomla has tons of awesome themes and modules. I don’t want a million hacks like CCK, Views, Tokens, Pathauto, ImageCache and CTools just to run a simple website. Most of the complaints from users are related to the learning and development curve involved with Drupal, and the lack of ecosystem. While most of the problems will be gone in Drupal 7, ecosystem is something that needs to be built by the Drupal community. Drupal distributions are a great step forward. There are few awesome Drupal distributions available like Open Publish, Open Atrium and Drupal Commons. I predict, there will be a wave of many powerful Drupal distributions after Drupal 7 release. Many of them will be user-friendly and commercial supported. Following is my post at Drupal.org forums: Quote from: http://drupal.org/node/863776#comment-3313836 Brian Gardner (StudioPress) and Woo Themes launched premium WordPress themes in 2007, the developer community did not accept it at first. Moreover, they were not even GPL licensed. There was an outcry in WordPress community against them. Following that, most premium theme providers switched to GPL licensing. Despite controversies, users voted for premium theme and plugins by buying them. Inspired by their success, hundreds of other developers started to sell premium themes and plugins. It is now the acceptable and in fact most popular business model among WordPress community. Matt Mullenweg once told me, they would not support premium themes. If he supported, developers would no more give out free GPL themes & plugins. He pointed me towards Joomla, there were hardly any nice free themes & modules available. Now two years forward, premium products are not just accepted but embraced by the WordPress community – http://wordpress.org/extend/themes/commercial/ The quality and number of themes & modules has increased, even the free ones. This also helped to boost the adoption and ecosystem of WordPress. Today, state of Drupal is like WordPress was in 2007. There are hardly any out of the box solutions available for Drupal. Ubercart, Open Publish and Open Atrium are the only ones I can think of. Many of the popular Drupal modules are patches and hole-fillers. Thankfully, these hole-filler modules are going to be in Drupal 7 core. Drupal 7 and distributions will spawn a new array of solutions built upon Drupal. Soon, we will have more like Ubercarts and Open Atriums. If commercial solutions can help fuel this ecosystem and growth, Drupal community will accept them eventually. This debate will not stop your customers from buying your product. If your product is awesome, they will vote for you by buying your product.

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