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  • Fast, easy, and secure method to perform DB actions with GET

    - by rob - not a robber
    Hey All, Sort of a methods/best practices question here that I am sure has been addressed, yet I can't find a solution based on the vague search terms I enter. I know starting off the question with "Fast and easy" will probably draw out a few sighs, so my apologies. Here is the deal. I have a logged in area where an ADMIN can do a whole host of POST operations to input data relating to their profile. The way I have data structured is pretty distinct and well segmented in most tables as it relates to the ID of the admin. Now, I have a table where I dump one type of data into and differentiate this data by assigning the ADMIN's unique ID to each record. In other words, all ADMINs have this one type of data writing to this table. I just differentiate by the ADMIN ID with each record. I was planning on letting the ADMIN remove these records by clicking on a link with a query string - obviously using GET. Obviously, the query structure is in the link so any logged in admin could then exploit the URL and delete a competitor's records. Is the only way to safely do this through POST or should I pass through the session info that includes password and validate it against the ADMIN ID that is requesting the delete? This is obviously much more work for me. As they said in the auto repair biz I used to work in... there are 3 ways to do a job: Fast, Good, and Cheap. You can only have two at a time. Fast and cheap will not be good. Good and cheap will not have fast turnaround. Fast and good will NOT be cheap. haha I guess that applies here... can never have Fast, Easy and Secure all at once ;) Thanks in advance...

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  • Is Assert.Fail() considered bad practice?

    - by Mendelt
    I use Assert.Fail a lot when doing TDD. I'm usually working on one test at a time but when I get ideas for things I want to implement later I quickly write an empty test where the name of the test method indicates what I want to implement as sort of a todo-list. To make sure I don't forget I put an Assert.Fail() in the body. When trying out xUnit.Net I found they hadn't implemented Assert.Fail. Of course you can always Assert.IsTrue(false) but this doesn't communicate my intention as well. I got the impression Assert.Fail wasn't implemented on purpose. Is this considered bad practice? If so why? @Martin Meredith That's not exactly what I do. I do write a test first and then implement code to make it work. Usually I think of several tests at once. Or I think about a test to write when I'm working on something else. That's when I write an empty failing test to remember. By the time I get to writing the test I neatly work test-first. @Jimmeh That looks like a good idea. Ignored tests don't fail but they still show up in a separate list. Have to try that out. @Matt Howells Great Idea. NotImplementedException communicates intention better than assert.Fail() in this case @Mitch Wheat That's what I was looking for. It seems it was left out to prevent it being abused in another way I abuse it.

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  • Software load balancing fail-over vs hardware

    - by SmartLemon
    Please correct me, but my understanding is that with software load balancing a service must be run on each server while there is one DS that notifies the other servers that a server has gone down and that they should consume that servers load. With hardware load balancing what happens in a fail-over? Could someone explain? Is there advantages with using hardware load balancing when it comes to fail-over, or is there advantages with software? Or do they both have their pros and cons?

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  • How to stop a random ramp in FCGI Processes Killing the server

    - by Andy Main
    So got the below earlier to day... Around that time the logs show a ramp in processes(600) and associated memory (1.2g), cpu usage load average (80) untill the server gave out. Server had to be hard reset by host as there was no ssh or plesk panel access. Fast CGI is configured as below and is setup for one high use site. As I understand it FcgidMaxProcesses 20 should protect against what happen but has not. I've read many forums with differing answers and references to many different fcgi directives, but have found nothing conclusive. Any one got some definitive answers on how to stop this sort of server process ramping and subsequent server failure? If you need more info let me know. Cheers Andy  /var/log/apache2/error_log [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17651 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17650 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17649 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17644 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17643 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17638 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17633 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17627 graceful kill fail, sending SIGKILL [Thu May 17 07:40:47 2012] [warn] mod_fcgid: process 17622 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17674 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17673 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17672 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17667 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17666 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17665 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17664 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17659 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17658 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17657 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17656 graceful kill fail, sending SIGKILL [Thu May 17 07:40:51 2012] [warn] mod_fcgid: process 17651 graceful kill fail, sending SIGKILL https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VRmFLWEZfR2VBb2M https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VWTcwZEhoV2Fqejg https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VUUtVWWFINHZjZ0U https://docs.google.com/a/thesugarrefinery.com/open?id=0B_XbpWChge0VZEVMclh6ZUdaOUE <IfModule mod_fcgid.c> <IfModule !mod_fastcgi.c> AddHandler fcgid-script fcg fcgi fpl </IfModule> FcgidIPCDir /var/lib/apache2/fcgid/sock FcgidProcessTableFile /var/lib/apache2/fcgid/shm FcgidIdleTimeout 40 FcgidProcessLifeTime 30 FcgidMaxProcesses 20 FcgidMaxProcessesPerClass 20 FcgidMinProcessesPerClass 0 FcgidConnectTimeout 30 FcgidIOTimeout 120 FcgidInitialEnv RAILS_ENV production FcgidIdleScanInterval 10 FcgidMaxRequestLen 1073741824 </IfModule>

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  • Fast Ethernet module for Cisco 2620

    - by Kenny Rasschaert
    I have a Cisco 2620 Router. It comes with one fast ethernet port built in (circled in red), and one old AUI ethernet module is installed (circled in blue). I figure I can put a transceiver on the AUI interface to get a second RJ45 connector. What I'd really like to have is a second fast ethernet connector. The ideal candidate to achieve this would be the NM-1FE-TX module. Cisco claims on their website that this module is not suitable for the Cisco 2620 and Cisco 2620XM. It says so in "Table 2 Physical Limitation of Serial Modules per Chassis". Indeed, this module was designed for the 3600 series of routers. I've seen claims on the internet, however, of people having this module on a 2620XM, and it being fully functional. This claim gains some credibility because of the fact that in Cisco's own Packet Tracer software, you can install this module on the 2620XM router. I'm looking for a definitive answer. Will this module work on a Cisco 2620? Is there perhaps another way to get a second fast ethernet port on this device?

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  • Win 7: apps crash, then explorer crashes, then services fail, then boom

    - by snorfys
    Periodically, every 2-3 days one of my systems will go haywire: every app will crash search will fail via the start menu and then explorer will fail. Restarting explorer via taskmanager will cause it to fail again, then it'll BSOD and restart. The eventlog for when this happens goes something like this every time: ERROR: Session "ReadyBoot" stopped due to the following error: 0xC0000188 (supposedly not a problem) WARNING: The maximum file size for session "ReadyBoot" has been reached... (forget where I found out, but also 'not a problem') ERROR: Session "Circular Kernel Context Logger" stopped due to the following error: 0xC0000188 (again, supposedly not a problem) WARNING: The maximum file size for session "Circular Kernel Context Logger" has been reached... ERROR: Faulting application name: Explorer.EXE, version: 6.1.7600.16450, time stamp:... ERROR: Faulting application name: explorer.exe, version: 6.1.7600.16450, time stamp:... ERROR: Faulting application name: svchost.exe_iphlpsvc, version: 6.1.7600.16385, time stamp:... ERROR: The Service Name service terminated unexpectedly. It has done this 1 time(s) That last one happens a number of times but with a different service name. Then finally we have: ERROR: The Service Control Manager tried to take a corrective action (Restart the service) after the unexpected termination of the Server service, but this action failed with the following error: An instance of the service is already running. After that, I have my BSOD and logs complaining that windows started up without shutting down. It's a new machine: Intel i3 530 4gb RAM (Ran memtest for 4 hrs, no problems) 320GB WD/250GB Seagate HDDs (Happened on fresh installs on 2 separate HDDs) Win7 Pro/Ultimate x64 (wife's copy of pro, my copy of ult, no change) Fresh install + driver and windows update (happened without updates as well) I'm at a bit of a loss as to what I can look at next. Especially since it'll work like a charm for 2-3 days and then it's hooped for a night (I'm on it now in fact - no problems).

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  • Windows Explorer slow to open networked computer, fast to navigate once opened

    - by Scott Noyes
    I open Windows Explorer and enter an IP for a computer on my home network (\\192.168.1.101). It takes 30 seconds or more to present a list of the shared folders. It does not appear to be an initial handshaking/authentication thing; even if I allow the view to load and then immediately load the same again, it is always slow. Once they appear, navigating through folders and opening files is fast. Also, navigating directly to a folder (\\192.168.1.101\My Music) is fast, even if it's the first connection since a restart. Using \\computerName instead of the IP address gives exactly the same results. Pings return in 1ms. net view \\computerName (or \ipAddress) returns the list of shared folders fast. This makes me suspect an Explorer issue rather than a network issue. Suspecting that the remote computer was being automatically indexed or something, I went into Tools-Folder Options-View and unchecked "Automatically search for network folders and printers," but that made no difference. De-selecting the "Folders" icon near the address bar makes no difference. Adding the IP address and computer name to the hosts file makes no difference. Both computers involved are laptops running Windows XP. Both have WiFi and cable adapters. Mine is not connected via cable. The result is the same whether the target is plugged in to the cable or not (although the IP address changes - 192.168.1.101 over cable, 192.168.1.103 over WiFi.) We are using DHCP assigned by the router.

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  • Why do many software projects fail today?

    - by TomTom
    As long as there are software projects, the world is wondering why they fail so often. I would like to know if there is a list or something equivalent which shows how many software projects fail today. Would be nice if there would be a comparison over the last 20 - 30 years. You can also add your top reason why a software project fails. Mine is "Requirements are poor or not even existing." which includes also "No (real) customer / user involved". EDIT: It is nearly impossible to clearly define the term "fail". Let's say that fail means: The project was more than 10% over budget and time. In my opinion the 10% + / - is a good range for an offer / tender. EDIT: Until now (Feb 11) it seems that most posters agree that a fail of the project is basically a failure of the project management (whatever fail means). But IMHO it comes out, that most developers are not happy with this situation. Perhaps because not the manager get penalized when a project was not successful, but the lazy, incompetent developer teams? When I read the posts I can also hear-out that there is a big "gap" between the developer side and the managment side. The expectations (perhaps also the requirements) seem to be so different, that a project cannot be successful in the end (over time / budget; users are not happy; not all first-prio features implemented; too many bugs because developers were forced to implement in too short timeframes ...) I',m asking myself: How can we improve it? Or do we have the possibility to improve it? Everybody seems to be unsatisfied with the way it goes now. Can we close the gap between these two worlds? Should we (the developers) go on strike and fight for "high quality reqiurements" and "realistic / iteration based time shedules"? EDIT: Ralph Westphal and Stefan Lieser have founded a new "community" called: Clean-Code-Developer. The aim of the group is to bring more professionalism into software engineering. Independently if a developer has a degree or tons of years of experience you can be part of this movement. Clean Code Developers live principles like SOLID every day. A professional developer is the biggest reviewer of his own work. And he has an internal value system which helps him to improve and become better. Check it out on: Clean Code Developer EDIT: Our company is doing at the moment a thing called "Application Development and Maintenance Benchmarking". This is a service offered by IBM to get a feedback from someone external on your software engineering process quality etc. When we get the results, I will tell you more about it.

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  • Reasons to fail a build

    - by Brian Laframboise
    As a build engineer, I'm constantly looking for new and interesting ways to improve our build process - and that includes looking for new and interesting ways to fail our builds! I have yet to find a canonical list of reasons to fail a build ... so I figure it's time to get one created. With that in mind: What build-time checks - both obvious and creative - have you seen fail builds?

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  • Fail rate of EBS snapshots and AMIs?

    - by user784637
    According to Amazon the fail rate of EBS volumes is: As an example, volumes that operate with 20 GB or less of modified data since their most recent Amazon EBS snapshot can expect an annual failure rate (AFR) of between 0.1% – 0.5%, where failure refers to a complete loss of the volume http://aws.amazon.com/ebs/ However, I was curious to know the fail rate of EBS snapshots and private AMIs that a system admin would take. Since the EBS snapshots and AMIs are stored in Amazon s3, is it safe to assume that the likelihood you cannot rollback to a previous snapshot or AMI the same likelihood that a file gets lost in s3? Amazon S3’s standard storage is: ... Designed to provide 99.999999999% durability and 99.99% availability of objects over a given year. http://aws.amazon.com/s3/

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  • How does RAM fail?

    - by ethanlee16
    I have an issue with a Dell Inspiron 15 (1545) laptop that refuses to open any applications (save select Microsoft programs, e.g. Security Essentials, Ctrl Panel, Windows Explorer (not Internet), regedit, Event Viewer, etc.). I've run Microsoft Memory Diagnostics Tool and it found a 'hardware problem was detected.' Does this indicate that the RAM has failed? I notice when I open programs like Word, Excel, Internet Explorer, etc., it always give me an error from WerFault.exe saying The instruction at xxxxxxx referenced memory at xxxxxxxxx. The memory could not be written. and sometimes something about illegal instructions. If it is a hardware problem, does this mean that replacing the RAM is my only option? Again, I would also like to know if RAM can fail (like hard drives) and if malware can cause RAM to fail also.

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  • Existing connexion on Apache and mod_proxy_balancer don't fail over second JBoss node

    - by Jean-Rémy Revy
    I have a Jboss farm, load balanced by Apache HTTP + mod_proxy_balancer and mod_proxy_ajp, with the following configuration : <VirtualHost *:80> ServerName web-gui-acceptance.myorg.com ServerAlias web-gui-acceptance ProxyRequests Off ProxyPass /web-gui balancer://jbosscluster/web-gui stickysession=JSESSIONID nofailover=On ProxyPassReverse /web-gui http://srvlnx01.myorg.com:8080/web-gui ProxyPassReverse /web-gui http://srvlnx02.myorg.com:8080/web-gui <Proxy *> AuthType Kerberos [...] </Proxy> <Proxy balancer://jbosscluster> BalancerMember ajp://srvlnx01.myorg.com:8009 route=SRVLNX01_node1 BalancerMember ajp://srvlnx01.myorg.com:8009 route=SRVLNX02_node1 ProxySet lbmethod=byrequests </Proxy> </VirtualHost> When the first JBoss node fail (the hosting VM is down), my existing connexions don't fail over the second node ... the fist route is keeped (in table / .shm ?) and that provide me 503 errors. Can someone tell me what I missed ?

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  • OS X Server - setting up a share for network home directories + fast user switching

    - by sohocoke
    I'm nearly finished setting up my Open Directory master to allow users to be managed centrally and logged in on any of the client machines at home. I found discussion suggesting that using an AFP share for the 'Users' automount would result in network users (cf. users defined locally, or Portable Home Directory users) are unable to use fast user switching, as the first user logging in would trigger the automount and mount the 'Users' share with his permissions, preventing further users from using the mount. I've also found some suggestions to configure autofs such that the 'Users' share is mounted prior to any user logging in, but not great amounts of details along these lines. I'd greatly appreciate some instructions to set up autofs - ideally, on the OpenDirectory server rather than each client's etc/fstab or equivalent location, so that it isn't required per every client machine - to get fast user switching working with network users.

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  • APC serving old code intermittently running with Lighttpd and PHP Fast CGI

    - by APZ
    I recently started facing this problem that APC shows old code when we upload a html template file to fix/ change something on our websites. We run APC with Stat=0 and want to keep it that way because we seldomly make changes to templates. Every time we upload a template we make sure to flush APC cache and we execute this script(shown only some part of the script here) to clear the cache: apc_clear_cache(); apc_clear_cache('user'); apc_clear_cache('system'); apc_clear_cache(opcode); We use lightpd and PHP Fast CGI and fast cgi has "max-procs" = 2, "PHP_FCGI_CHILDREN" = "5", Even after flushing APC once upload is complete it serves the old template intermittently. Any help would be appreciated.

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  • tomcat6 on ubuntu fails when user set to root

    - by J G
    I'm well aware that running tomcat6 is really bad from a security point of view - and opens the box it is running on to all kinds of security risks and attack vectors. That said: When I change the entry in the /etc/init.d/tomcat6 to TOMCAT6_USER=root and then run sudo /etc/init.d/tomcat6 start I get [fail] and nothing is written to the logs under /var/log/tomcat6 and no entry for tomcat6 is created under /var/run How do I diagnose what is going wrong?

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  • Archive software for big files and fast index

    - by AkiRoss
    I'm currently using tar for archiving some files. Problem is: archives are pretty big, contains many data and tar is very slow when listing and extracting. I often need to extract single files or folders from the archive, but I don't currently have an external index of files. So, is there an alternative for Linux, allowing me to build uncompressed archive files, preserving the file attributes AND having fast access list table? I'm talking about archives of 10 to 100 GB, and it's pretty impractical to wait several minutes to access a single file. Anyway, any trick to solve this problem is welcome (but single archives are non-optional, so no rsync or similar). Thanks in advance! EDIT: I'm not compressing archives, and using tar I think they are too slow. To be precise about "slow", I'd like that: listing archive content should take time linear in files count inside the archive, but with very little constant (e.g. if a list of all the files is included at the head of the archive, it could be very fast). extraction of a target file/directory should (filesystem premitting) take time linear with the target size (e.g. if I'm extracting a 2MB PDF file in a 40GB directory, I'd really like it to take less than few minutes... If not seconds). Of course, this is just my idea and not a requirement. I guess such performances could be achievable if the archive contained an index of all the files with respective offset and such index is well organized (e.g. tree structure).

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  • Some URLs fail to load on Windows web portal

    - by jpolache
    I’m working in a large data center and have been assigned to troubleshoot and issue with a windows (IIS) web server that acts as a portal for a customer of the data center. This portal server is on a DMZ at the local data center. I don’t have access to the portal desktop and am relying on an off-site administrator to work with me to do testing and report the condition of the portal. He tells me there are no software firewalls or other filtering configured. While most of the remote web pages work fine, several of the URSs the portal is suppose to serve up fail to load. I had wireshark installed on the portal system and had a capture taken of one of the failures. I used IE to access one of the remote web servers at issue. I could see the TCP SYN-ACK coming back from the remote server, but after several HTTP GETs fail to get a response the portal server sends a reset. The webmaster of the remote web server assures me that no sites are being blocked. I had a capture taken outside the local firewall, so there should be no issue there. Another tech set up a laptop and used the IP address of the portal (we took the portal off-line for the test). The laptop loads the URL as expected. I tried having Firefox loaded to make sure that the HTTP GET was not mal-formed. Same failure as with IE. So, it seems it is not the remote web server or the network, because there was no problem with the laptop. At this point, I’m not sure what other questions to ask or tests to do.

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  • memcache fast-cgi php apache 2.2 windows 7 creating problems

    - by Ahmad
    hi, i am trying to run memcache, fast-cgi with apache 2.2 + php on a windows 7 machine. if i dont use memcache everything works fine. the moment i disable extension=php_memcache.dll in php.ini everything returns to normal. once i start apache, the apache logs say: [Wed Jan 12 18:19:23 2011] [notice] Apache/2.2.17 (Win32) mod_fcgid/2.3.6 configured -- resuming normal operations [Wed Jan 12 18:19:23 2011] [notice] Server built: Oct 18 2010 01:58:12 [Wed Jan 12 18:19:23 2011] [notice] Parent: Created child process 412 [Wed Jan 12 18:19:23 2011] [notice] Child 412: Child process is running [Wed Jan 12 18:19:23 2011] [notice] Child 412: Acquired the start mutex. [Wed Jan 12 18:19:23 2011] [notice] Child 412: Starting 64 worker threads. [Wed Jan 12 18:19:23 2011] [notice] Child 412: Starting thread to listen on port 80. and after accessing the page [the page just has echo phpinfo()]. i get this error in the error.log [Wed Jan 12 18:20:54 2011] [warn] [client 127.0.0.1] (OS 109)The pipe has been ended. : mod_fcgid: get overlap result error [Wed Jan 12 18:20:54 2011] [error] [client 127.0.0.1] Premature end of script headers: index.php i have php_memcache.dll in my ext directory and httpd.conf is like this: LoadModule fcgid_module modules/mod_fcgid.so FcgidInitialEnv PHPRC "c:/php" FcgidInitialEnv PATH "c:/php;C:/WINDOWS/system32;C:/WINDOWS;C:/WINDOWS/System32/Wbem;" FcgidInitialEnv SystemRoot "C:/Windows" FcgidInitialEnv SystemDrive "C:" FcgidInitialEnv TEMP "C:/WINDOWS/Temp" FcgidInitialEnv TMP "C:/WINDOWS/Temp" FcgidInitialEnv windir "C:/WINDOWS" FcgidIOTimeout 64 FcgidConnectTimeout 32 FcgidMaxRequestsPerProcess 500 <Files ~ "\.php$>" AddHandler fcgid-script .php FcgidWrapper "c:/php/php-cgi.exe" .php </Files> so the problem has to be related to memcache coz if i disable it, fast-cgi seems to be working fine. any possible reasons for this?? the memcache service is running.. i can check it through control panel-services

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  • SSL certificate fail apache

    - by Murkin
    Hello, I have setup a certificate on Apache server. When I access my site's https pages, I see the certificate flashing (in FireFox's url tab) and disappearing immediately. The browser stays in the same windows (https) but now certificate info is not displayed and the connection is not encrypted. Can anyone recommend on how I can even start checking what is wrong ? (Certificate fail ? Bad config ?) Thanks

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  • How do I re-enable fast user switching

    - by David Waters
    I am running Windows7 RC1, I have recently installed CheckPoint VPN SecureClient (http://www.checkpoint.com/products/vpn-1_clients/) to connect to my work network. On installation this appears to have disabled Fast User Switching. You will notice "Switch user" is now greyed out. I tried some googleing first and the most popular solution is to remove a registry entry at HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon \ GinaDLL I have no entry there. Any ideas? Thanks.

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