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Hogging Threads With ONS After Upgrading to WebLogic Server 10.3.6 (Doc ID 1940146.1)

Last updated on OCTOBER 18, 2018

Applies to:

Oracle WebLogic Server - Version 10.3.6 to 10.3.6
Information in this document applies to any platform.


Customers report seeing many hogging threads with ONS, which is used by Gridlink datasources, after upgrading WebLogic Server from version 10.3.5 to 10.3.6. The thread dump shows the following stack trace:

"[ACTIVE] ExecuteThread: '4' for queue: 'weblogic.kernel.Default (self-tuning)'" id=112 idx=0x1e8 tid=5015 prio=5 alive, waiting, native_blocked, daemon
  -- Waiting for notification on: java/lang/Object@0x12bc96968[fat lock]
  at jrockit/vm/Threads.waitForNotifySignal(JLjava/lang/Object;)Z(Native Method)
  at java/lang/Object.wait(J)V(Native Method)
  at oracle/ons/NotificationQueue.internalDequeue(
  ^-- Lock released while waiting: java/lang/Object@0x12bc96968[fat lock]
  at oracle/ons/NotificationQueue.dequeue(
  at oracle/ons/Subscriber.receive(
  at oracle/ucp/jdbc/oracle/ONSSubscriberBase.receiveMoker(
  at oracle/ucp/jdbc/oracle/ONSSubscriberBase.receive(
  at oracle/ucp/jdbc/oracle/ONSOracleRuntimeLBEventSubscriber.receive(
  at oracle/ucp/jdbc/oracle/
  at oracle/ucp/util/
  at weblogic/jdbc/common/rac/internal/
  at weblogic/work/SelfTuningWorkManagerImpl$
  at weblogic/work/ExecuteThread.execute(
  at weblogic/work/
  at jrockit/vm/RNI.c2java(JJJJJ)V(Native Method)
  -- end of trace


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