If you start WebLogic Admin Server and if Admin Server hangs at “Initializing self-tuning thread pool” then look for following

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<12-Jan-2013 14:34:04 o’clock GMT> <Notice> <WebLogicServer> <BEA-000365> <Server state changed to STARTING>
<12-Jan-2013 14:34:04 o’clock GMT> <Info> <WorkManager> <BEA-002900> <Initializing self-tuning thread pool>
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  • Ensure that /tmp has space (Weblogic Diagnostic Framework DFW)
  • If there is enough disk space in /tmp then try clearing tmp and cache folder from $DOMAIN_HOME/servers/AdminServer
  • Check /tmp has write permission for user starting WebLogic Admin Server

After ” Initializing self-tuning thread pool ” server goes into the starting mode and open the Log file for writing logs under $DOMAIN_HOME/servers/AdminServer/logs

 

If WebLogic Server Startup hangs at ‘Log File‘ and ‘IIOP subsystem enabled‘ in Server logs then check this