EM 12c: Enterprise Manager 12c Cloud Control Generates False Status Alerts for Target Down (Doc ID 1923169.1)

Last updated on AUGUST 29, 2017

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.4.0 and later
Enterprise Manager Base Platform - Version 12.1.0.4.0 and later
Information in this document applies to any platform.

Symptoms

False target down status alerts are displayed in Enterprise Manager (EM) 12.1.0.4 Cloud Control. The Agent is reporting the following errors:

2014-08-20 19:14:33,403 [337:GC.Executor.27 (oracle_database:ORCL:Response)] ERROR - oracle_database:ORCL:Response
oracle.sysman.gcagent.task.TaskZombieException: task declared as a zombie
at oracle.sysman.gcagent.task.TaskFutureImpl$WrappedTask.accountedCall(TaskFutureImpl.java:620)
at oracle.sysman.gcagent.task.TaskFutureImpl$WrappedTask.call(TaskFutureImpl.java:643)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314)
at java.util.concurrent.FutureTask.run(FutureTask.java:149)
at oracle.sysman.gcagent.task.TaskFutureImpl.run1(TaskFutureImpl.java:380)
at oracle.sysman.gcagent.task.TaskFutureImpl.run(TaskFutureImpl.java:337)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:908)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:931)
at oracle.sysman.gcagent.task.executor.TrackThreadFactory$1.run(TrackThreadFactory.java:54)
at oracle.sysman.gcagent.util.system.GCAThread$RunnableWrapper.run(GCAThread.java:189)
at java.lang.Thread.run(Thread.java:738)
2014-08-20 19:14:33,403 [337:GC.Executor.27] ERROR - Critical error:
oracle.sysman.gcagent.task.TaskZombieException: task declared as a zombie

Thread-49" id=345 RUNNABLE (running in native)
  at sun.nio.ch.PollsetArrayWrapper.pollsetPoll(Native Method)
  at sun.nio.ch.PollsetArrayWrapper.poll(PollsetArrayWrapper.java:289)
  at sun.nio.ch.PollsetSelectorImpl.doSelect(PollsetSelectorImpl.java:74)
  at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:81)
  at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:92)
  at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:96)
  at oracle.jdbc.driver.NTFListener.run(NTFListener.java:78)

"GC.Executor.30 (oracle_database:ORCL:Response) (oracle_database:ORCL:Response:Response)" id=346 BLOCKED on lock=java.net.InetAddress$localHostCacheLock@1b101b10
  owned by FetchletExecutor(Sql)oracle_database.ORCL.com id=744
  at java.net.InetAddress.getLocalHost(InetAddress.java:1474)
  at oracle.jdbc.driver.T4CTTIoauthenticate.setSessionFields(T4CTTIoauthenticate.java:897)
  at oracle.jdbc.driver.T4CTTIoauthenticate.(T4CTTIoauthenticate.java:221)

Metric evaluation error start - oracle.sysman.emSDK.agent.fetchlet.exception.FetchletException: Timeout during collection: oracle.sysman.gcagent.task.TaskTimeoutException: task timeout: 120000 MILLISECONDS for oracle_database:ORCL.com:Response

 

Changes

 

Cause

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