EM 13c, 12c: Agent Restarted Due to Zombies / DB Metric - High Disk I/O Reported in OS Watcher (Doc ID 2072954.1)

Last updated on FEBRUARY 19, 2020

Applies to:

Symptoms

Agent getting restarted  due to zombies

/AGENT_INST/sysman/log/gcagent.log reports following message

2015-07-15 22:21:31,580 [163:E09AE85F] WARN - Declaring longop oracle_database:<TARGET_NAME>:Response:COLLECTION_TASK:Wed Jul 15 22:05:36 CEST 2015 as a zombie
2015-07-15 22:21:31,581 [163:E09AE85F] WARN - Declaring longop oracle_database:<TARGET_NAME>:observer_11g:COLLECTION_TASK:Wed Jul 15 22:05:48 CEST 2015 as a zombie
2015-07-15 22:21:31,581 [163:E09AE85F] WARN - Declaring longop oracle_listener:<LISTENER0_TARGET>:Response:COLLECTION_TASK:Wed Jul 15 22:05:41 CEST 2015 as a zombie
2015-07-15 22:21:31,582 [163:E09AE85F] INFO - Suspended oracle_database:<TARGET_NAME>:observer_11g:observer_11g until 2015-07-16 22:21:31.581
2015-07-15 22:21:31,582 [163:E09AE85F] INFO - Suspending oracle_database:<TARGET_NAME>:observer_11g:observer_11g for finite suspension until Thu Jul 16 22:21:31 CEST 2015 due to zombie task
2015-07-15 22:21:31,594 [11717:42FB151E:GC.Executor.21 (oracle_database:<TARGET_NAME>:Response)] WARN - IntervalSchedule: Skip schedule [oracle_database:<TARGET_NAME>:Response] - skipping due to execution time exceeding interval
2015-07-15 22:21:31,596 [11717:GC.Executor.21 (oracle_database:<TARGET_NAME>:Response)] ERROR - oracle_database:<TARGET_NAME>: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:303)

Cause

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