IHS ServerIOTimeout

There can be a number of reasons for seeing a message like the one below in your http_plugin.log

ERROR: ws_common: websphereHandleRequest: Failed to execute the transaction to 'myClusterMember' on host 'myHost'; will try another one

... but a common reason is that ServerIOTimeout in plugin-cfg.xml is set too low 

To verify, set your log level to trace (i.e in plugin-cfg.xml change LogLevel from "error" to "trace"), wait for RefreshInterval (or bounce IHS if you're impatient) and look for the following message...

lib_rio: wait_on_socket: ServerIOTimeout fired.

Point to note.. if you are seeing this message in an environment where you have SSL Client Authentication enabled (aka 2-way SSL) chances are that you'll also be seeing GSK errors (look for PARTNER CERTIFICATE). I saw this and spend a while chasing down a non-existent trust issue. I then realised that the reason this was happening is because (I think) that the ServerIOTimeout was firing during the SSL handshake.

ps... don't forget to set your LogLevel back to "error"

WebSphere and Java monitoring tools

 

 

WebSphere Application Server Performance (WASP) Toolkit

http://www.ibm.com/developerworks/websphere/downloads/peformtuning.html
Rather than download the whole ISA workbench, you can just install the bit that you need to monitor the WebSphere PMI stats

Heap Analyser

https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=4544bafe-c7a2-455f-9d43-eb866ea60091

Thread Analyser

https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=2245aa39-fa5c-4475-b891-14c205f7333c

Pattern Modeling and Analysis Tool for Java Garbage Collector

https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=22d56091-3a7b-4497-b36e-634b51838e11

Performance Analysis Tool for Java

https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=10bb17f5-34bf-4675-9e97-328c9e3c9b9c


Here's the main index where these and more tools are listed - https://www.ibm.com/developerworks/community/groups/service/html/communityview?communityUuid=18d10b14-e2c8-4780-bace-9af1fc463cc0

Dropping a JSP into an existing WebApp

I'll use IBM's WebSphere Perf Servlet as an example...

Placing hello.jsp in /opt/bpm/profiles/profile_name/installedApps/cell_name/perfServletApp.ear/perfServletApp.war allows this URL to be called
http://<host>:<port>/wasPerfTool/hello.jsp

Looking at Solaris JVM heap

Carry out a a full heap dump

• jmap -d64 -dump:format=b,file=/tmp/heap.hprof  <PID>

Read the heap dump

• jhat  -port <port> -J-mx2048m /tmp/heap.hprof
• Point a browser at the host you are running jhat on using the port specified by -port above