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Monday, 15 February 2016

Generate Thread Dumps in WebLogic 12C using WLST & Admin Console

Thread Dump is a snapshot of the state of all Threads That are part of the process.
Thread dumps are one of the very important JVM reports , which we can use to analyse server/JVM hang situations and the root cause of it.

Pre - requisites for this experiment:

  • WebLogic installed
  • Domain Configuration
  • AdminServer,Managed Servers Running state

There are 2 ways to Generate Thread Dumps in WebLogic:

1) From WebLogic Admin Console
2) Using WLST commands

1) ThreadDump from WebLogic Admin Console:
  • Open Servers tab in Admin Console
  • Select Admin/Managed Servers
  • Select Monitoring -> Threads tab
  • Then click on Thread Dump ->Dump Thread Stacks

Thread Dump
Generating Thread Dumps using Admin Console

2) Using WLST commands:

  • Set the CLASS PATH by using Environment variables("java weblogic.WLST") to connect WLST
  • Then it will connect to wls:/offline> 
  • connect("username","password","url:port")
  • Example:  connect("weblogic","welcome1","")
  • threadDump()

Thread Dump using WLST

Output :  Thread Dump for AdminServer

Thread Dump for WebLogic AdminServer

WebLogic Books

  • Oracle WebLogic Server 12c: Administration Handbook
  • WebLogic Diagnostic Framework
  • Advanced WebLogic Server Automation
  • Oracle SOA Suite 11g Administrator's Handbook

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