EM12c: Enterprise Manager 12c Cloud Control Incident Constantly Raised for oracle.sysman.gcagent.task.TaskZombieException: task declared as a zombie
(Doc ID 2116834.1)
Last updated on JUNE 20, 2023
Applies to:
Enterprise Manager for Oracle Database - Version 12.1.0.4.0 to 12.1.0.5.0 [Release 12.1]Information in this document applies to any platform.
Symptoms
The $AGENT_INST/sysman/log/gcagent.log file for the Enterprise Manager (EM) 12.1.0.4 Cloud Control Agent shows:
at oracle.sysman.gcagent.task.TaskFutureImpl$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:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
Changes
To avoid the incidents, the following changes are implemented in the $AGENT_INST/sysman/config/emd.properties file:
_zombieSuspensions=true
_canceledThreadWait=900
_zombieThreadPercentThreshold=0
However, these changes were not enough to avoid the Incidents from being raised.
Reference:
<Note1468586.1> EM 12c: Agent Crashing Because Of Zombie Process 'Bouncing the agent due to zombies' Reported in gcagent.log
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |