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WARNING: CLMN Has Failed to Cleanup a Dead Process For Nnnn Attempts (Doc ID 2616322.1)

Last updated on JULY 09, 2021

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

PMON and CLMN are stuck trying to clean a process that does not exist anymore. Alert log shows below:


2019-04-24T06:52:24.236556+02:00
WARNING: CLMN has failed to cleanup a dead process for 10900 attempts
2019-04-24T07:11:04.370906+02:00
WARNING: CLMN has failed to cleanup a dead process for 11000 attempts
2019-04-24T07:28:44.498370+02:00
WARNING: CLMN has failed to cleanup a dead process for 11100 attempts

From pstack and strace

PMON
*** 2019-04-29T07:02:03.436489+02:00
239136 Found process 0xdc5e40e0 pid=109 serial=107 already dead
239137 PMON waiting for 1000 csecs
239138
239139 *** 2019-04-29T07:02:13.437481+02:00
239140 Found process 0xdc5e40e0 pid=109 serial=107 already dead
239141 PMON waiting for 1000 csecs

CLMN
*** 2019-04-29T07:02:03.435213+02:00
466204 PMON waiting for 1000 csecs
466205 KSFV: unable to clean up secondary so: ad6be320
466206 PMON waiting for 1000 csecs

Changes

 Regular database activity.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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