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

Last updated on SEPTEMBER 25, 2019

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.1.0 to 13.3.1.0.0 [Release 12.1 to 13.2]
Enterprise Manager Base Platform - Version 12.1.0.1.0 to 13.3.0.0.0 [Release 12.1 to 13c]
Information in this document applies to any platform.

Symptoms

False target down status alerts are displayed in Enterprise Manager 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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In this Document
Symptoms
Changes
Cause
Solution
References


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