Shulou(Shulou.com)06/01 Report--

Find the database alarm, check the alert log and find the following error

Errors in file / u01/app/oracle/diag/rdbms/orcl/orcl1/trace/orcl1_lgwr_26383.trc:

ORA-04021: timeout occurred while waiting to lock object

LGWR (ospid: 26383): terminating the instance due to error 4021

Sun Mar 25 03:29:07 2018

System state dump requested by (instance=1, osid=26383 (LGWR)), summary= [abnormal instance termination].

System State dumped to trace file / u01/app/oracle/diag/rdbms/orcl/orcl1/trace/orcle1_diag_26321_20180325032907.trc

Instance terminated by LGWR, pid = 26383

Sun Mar 25 03:29:20 2018

Starting ORACLE instance (normal)

First deal with the problem of DG database preparation, check the status to find that the database is MOUNT status, and start the database first.

SQL > alter database open

SQL > alter database recover managed standby database using current logfile disconnect

SQL > select open_mode from v$database

OPEN_MODE

READ ONLY WITH APPLY

Looking at the question again, MOS explains it as follows:

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

Bug 16717701-ADG SHOULD GET THE INSTANCE PARSE LOCK WITH A TIMEOUT

Bug 11712267-ACTIVE DATA GUARD DATABASE HUNG ON 'LIBRARY CACHE: MUTEX X' WAIT EVENT

LGWR trace file (RXEPRR1_lgwr_31312.trc)

2016-07-13 13 14 14 43 24 498

SESSION ID: (6709.1) 2016-07-13 1315 4315 24.498

CLIENT ID: () 2016-07-13 13 1315 4315 24.498

SERVICE NAME: (SYS$BACKGROUND) 2016-07-13 13 43 purl 24.498

MODULE NAME: () 2016-07-13 13 1315 4315 24.498

ACTION NAME: () 2016-07-13 13 1315 4315 24.498

Error 4021 detected in background process

ORA-04021: timeout occurred while waiting to lock object

Kjzduptcctx: Notifying DIAG for crash event

-Abridged Call Stack Trace-

Ksedsts () + 1296

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