Oracle - What TNS Names file am I using?
Sometimes I get Oracle connection problems because I can't figure out which tnsnames.ora file my database client is using. What's the best way to figure this out? ++happy for various platform solutions. ...
troubleshooting
Identifying SQL Server Performance Problems
We're having sporadic, random query timeouts on our SQL Server 2005 cluster. I own a few apps that use it, so I'm helping out in the investigation. When watching the % CPU time in regular ol' Perfmon, you can certainly see it pegging out. However, SQL activity monitor only gives cumulative CPU and IO time used by a process, not what it's...
ASP.NET controls cannot be referenced in code-behind in Visual Studio 2008
Ok, so, my visual studio is broken. I say this NOT prematurely, as it was my first response to see where I had messed up in my code. When I add controls to the page I can't reference all of them in the code behind. Some of them I can, it seems that the first few I put on a page work, then it just stops. I first thought it may be the ty...
Visual Studio Add-in not going away
Ok, so I demo'd Refactor Pro and Resharper, I'm more comfortable with Resharper so that's what I bought. When I uninstalled Refactor Pro I thought everything was breezy. However, now when I open Visual Studio I get The Add-in 'DevExpress Tools' failed to load or caused and exception, woudl you like to remove this Add in? If you choos...
IIS crashes when serving an ASP.NET application under heavy load. How to troubleshoot it?
I am working on an ASP.NET web application, it seems to be working properly when I try to debug it in Visual Studio. However when I emulate heavy load, IIS crashes without any trace -- log entry in the system journal is very generic, "The World Wide Web Publishing service terminated unexpectedly. It has done this 4 time(s)." How is it po...
What's the easiest way to install a missing Perl module?
I get this error: Can't locate Foo.pm in @INC Is there an easier way to install it than downloading, untarring, making, etc? ...
Problem installing warbler gem on linux
> jruby -S gem install warbler JRuby limited openssl loaded. gem install jruby-openssl for full support. Successfully installed warbler-0.9.11 1 gem installed Installing ri documentation for warbler-0.9.11... Installing RDoc documentation for warbler-0.9.11... > jruby -S warble <snip>/jruby-1.1.4/bin/warble:1: undefined method `warble' f...
org.eclipse.swt.SWTError: Item not added
Does somebody know how to recover a never-starting eclipse when the error "org.eclipse.swt.SWTError: Item not added" is raising againg and again? I'm using WebSphere Studio Site Developer (Windows) 5.1.0 The only stack trace in the .metadata/log file is: SESSION ---------------------------------------------------------------------- !E...
FollowSymLinks - how to setup
I am trying to have Apache follow a symlink to a raid array server that will contain some large data files. I have tried modifying httpd.conf to have an entry like this Options FollowSymLinks AllowOverride all Order allow,deny Allow from all to have Apache follow any sym link in the Sites folder. I keep getting an error ret...
Tips on walking through unfamiliar code or info on tools that help the process?
I would love tips on how to walk unfamiliar code with many objects. Before OOP this was still a difficult thing and I would do it with listings and have tabs and 8 fingers holding my place. With multiple monitors I have advanced my techniques so it's easier but still difficult. Eclipse does a pretty good job with letting you jump to ...
How can I restore svn control if the .svn folder has been damaged?
I've got a couple large checkouts where the .svn folder has become damaged so I'm getting and error, "Cleanup failed to process the following path.." And I can no longer commit or update files in that directory. I'd just delete and do the checkout again but the whole directory is over a gig. Is there a tool that will restore the .svn f...
How do I troubleshoot performance problems with an Oracle SQL statement
I have two insert statements, almost exactly the same, which run in two different schemas on the same Oracle instance. What the insert statement looks like doesn't matter - I'm looking for a troubleshooting strategy here. Both schemas have 99% the same structure. A few columns have slightly different names, other than that they're the s...
How do you troubleshoot WPF UI problems?
I'm working on a WPF application that sometimes exhibits odd problems and appears to hang in the UI. It is inconsistent, it happens in different pages, but it happens often enough that it is a big problem. I should mention that it is not a true hang as described below. My first thought was that the animations of some buttons was the p...
NetBIOS vs. FQDN
Hi! I've got an issue when accessing a web site, I can access it by using the NetBIOS name, but when accessing with the FQDN i get an error. Any ideas on how to troubleshoot this? (There is no DNS configured yet, we have modified the Hosts file to enter the related names and IP.) ...
Best free Java .class viewer?
I've used DJ Java Decompiler, which has a handy GUI, but it seems as if the latest version is only a trial and forces you to purchase the software after some period of days (I recall using an earlier free version about a year ago at a previous job). I'm aware of Jad and Jadclipse, but what I loved about DJ Java Decompiler was that it in...
How do I troubleshoot why my rewrite rules aren't being applied by apache?
I've got a tomcat 6 web app running with apache httpd as the front end. I'm using mod_proxy and mod_proxy_ajp to forward the requests to tomcat. My server is running ubuntu. Now I'm trying to use mod_rewrite to remove the leading www, so that my canonical website url is http://domain.com rather than http://www.domain.com I've read a ...
How do you diagnose network issues on Windows?
I often run into problems where I can't get something to connect to something else. I usually forget to check something obvious. Can you help with: A tip/technique for diagnosing a connection issue The name of a tool or application that can help (and the situation in which it's useful) I know the question is a little non-specific, bu...
"gem install" freezes at "updating Gem source index for [..]"
For some weeks now I simply can't run gem install in windows. It sticks on this line: C:\Windows\System32>gem install rails --version 2.1.2 Bulk updating Gem source index for: http://gems.rubyforge.org/ Any ideas what it could be? ...
Cannot import SQLite with Python 2.6
I'm running Python 2.6 on Unix and when I run the interactive prompt (SQLite is supposed to be preinstalled) I get: [root@idev htdocs]# python Python 2.6 (r26:66714, Oct 23 2008, 16:25:34) [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import sqlite Trace...
Why does a h1 tag display different in a div, when a doctype is set?
I have a div with a <h1> tag in a div, with no margins. If I define any doctype, a white space appears above the div. If I remove the <h1> tags, or remove the doctype definition, there is no space (as there should be. Why? Example HTML: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <...