OC4J 10.1.3 Performance Slows Down When the Load Increases by More Concurrent Users Accessing the Application. (Doc ID 731010.1)

Last updated on DECEMBER 27, 2020

Applies to:

Symptoms

When the load increases as more users are accessing the application, OC4J performance slows down leading to different timeout errors. These errors can be found in following files:

• OPMN log file : default_group~<oc4j instance>~default_group~1.log
  Errors:
  
  
  java.lang.IllegalStateException: IOException: An established connection was aborted by the software in your host machine
• HTTP Server: error:_log.xxx
  Errors:
  
  
  [Wed Jun 18 07:18:58 2008] [error][client <ip>] [ecid:<ecid>] mod_oc4j: Failed to find a failover oc4j process for session request for destination: <oc4j instance> (no island or jgroup).
  [Wed Jun 18 07:26:32 2008] [warn] [client <ip>] oc4j_read_client_data timed out
  [Wed Jun 18 07:48:32 2008] [warn] [client <ip>] oc4j_read_client_data timed out

Furthermore following information indicates this problem:

• OC4J thread dump shows large number (200+) of threads idle and waiting on socket read even when there are only 20 or fewer number of requests
• Running "netstat -an|grep <ajp port>" shows large number of sockets on "TIME_WAIT"

Also setting the OC4J startup option -Dajp.keepalive=true for the specific oc4j instance does not help.

Changes

Cause

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