ORA-04021: timeout occurred while waiting to lock object : DR Instance terminated by LGWR

(Doc ID 2183882.1)

Last updated on AUGUST 25, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 and later
Information in this document applies to any platform.

Symptoms

DR database crashed with below errors..

Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=XX.XXX.XXX.XX)(PORT=54537))
WARNING: inbound connection timed out (ORA-3136)
Wed Jul 13 13:43:24 2016
Errors in file /u01/app/oracle/diag/rdbms/rxeprr_dr/RXEPRR1/trace/RXEPRR1_lgwr_31312.trc:
ORA-04021: timeout occurred while waiting to lock object
LGWR (ospid: 31312): terminating the instance due to error 4021
Wed Jul 13 13:43:24 2016
System state dump requested by (instance=1, osid=31312 (LGWR)), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/rxeprr_dr/RXEPRR1/trace/RXEPRR1_diag_31221.trc
Wed Jul 13 13:43:25 2016
License high water mark = 318
Instance terminated by LGWR, pid = 31312
USER (ospid: 20898): terminating the instance
Instance terminated by USER, pid = 20898
Wed Jul 13 13:43:39 2016
Starting ORACLE instance (normal)

 

Changes

 No changes

Cause

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