IHS Diagnostic Tools and Information

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Mustgathers and known issues by symptom

These documents are grouped by external symptom. Each lists recent problems, their solutions, and outline the information needed to troubleshoot new problems.

• Crashes, Hangs, High CPU

• Memory Leaks

• Startup or Shutdown Failures

• Installation Failures

• IHS Admin Server

• Other client symptoms

Mustgather and known issues by feature

These documents are grouped by feature. Each listis recent problems, their solutions, and outline the information needed to troubleshoot new problems.

• Error Documents

• CRL and OCSP support

• NLS / UTF-8 issues

• SSL Certificates

• SSL runtime

• LDAP access control

Performance Tuning

Performance and scaling information: IBM HTTP Server performance tuning

Error message descriptions

More information on common error log messages: Descriptions for common error log messages

FAQ documents

Frequently asked questions grouped by subject.

• Disabling the HTTP TRACE method

• General / Miscellaneous

• SSL

• Cryptographic Hardware

• Security (non-SSL)

• mod_rewrite

• Start/Stop

• Upgrading

• WAS Plug-in

• rotatelogs / piped loggers

• Questions about specific modules not distributed with IHS

• Information about security vulnerability handling

z/OS specific FAQ documents

• z/OS FAQ

• z/OS: SAF Expired Password FAQ

• z/OS: Domino Go WebServer (DGW) / IHS 5.3 migration FAQs

FAQ's for related IBM software hosted here

• Edge Caching Proxy FAQ's

Misc topics

• Using mod_alias or mod_rewrite with the WebSphere Plug-in

• Supported uses of IBM HTTP Server.

• Using IBM HTTP Server V8 with WAS V7.

• Diagnosing problems in environments with third-party modules

• Using IBM HTTP Server diagnostic capabilities with WebSphere

  • Enhanced mod_mpmstats module timings

• preparing for possible problems ahead of time

• configuring IHS and the OS to take core dumps

• diagnosing suspected problems with mod_deflate

• getting backtraces from core dumps manually

Diagnostic modules for IBM HTTP Server

All available diagnostic modules for IBM HTTP Server 7.0 and later are included in the product installs. They do not require any separate download.

• mod_net_trace - trace network activity between IHS and the web browser or other client. Original documentation from when mod_net_trace required a separate download is preserved here

• mod_mpmstats - Monitor server status. Original documentation from when mod_net_trace required a separate download is preserved here

• mod_backtrace - automatic backtraces for child process crashes

• mod_whatkilledus - automatic collection of information about the request which caused a crash

Feedback

Provide feedback on the IBM HTTP Server forum on IBM developerWorks.

Questions about IBM HTTP Server may be posed on stackoverflow and serverfault