After manually dismounting an ASM group, then queries on v$asm_* views hang forever.
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CRS-4535: Cannot communicate with Cluster Ready Services
Two nodes 12.2.0.1 GI clusterware is not healthy with warning as below, databases and services are all still available for applications to connect to.
$ crsctl stat res -t CRS-4535: Cannot communicate with Cluster Ready Services CRS-4000: Command Status failed, or completed with errors. $ crsctl check cluster -all ************************************************************** racnode1: CRS-4535: Cannot communicate with Cluster Ready Services CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online ************************************************************** racnode2: CRS-4535: Cannot communicate with Cluster Ready Services CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online **************************************************************
crsd process is still running on both nodes:
-- on racnode1 $ ps -eaf | grep -i crsd root 5482 1 0 Mar01 ? 00:00:00 /u01/app/12.2.0.1/grid/bin/crsd.bin reboot -- on racnode2 $ ps -eaf | grep -i crsd root 66210 1 0 23:39 ? 00:00:02 /u01/app/12.2.0.1/grid/bin/crsd.bin reboot
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“DGM-17016: failed to retrieve status for database” in Data Guard Broker
The following error occurred in DG broker command on primary database side:
DGMGRL> show database verbose 'STDBYDB' Database - STDBYDB Role: PHYSICAL STANDBY ... .. . Database Status: DGM-17016: failed to retrieve status for database "STDBYDB" ORA-16664: unable to receive the result from a database
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“Duplicate from Active Database” Failed With ORA-12528 When Connecting to Auxiliary Instance
SYMPTOM
RMAN “duplicate target database for standby from active database” failed with below errors:
Connection from target database server to the auxiliary database fails with error: ORA-12528: TNS:listener: all appropriate instances are blocking new connections.
It is a little bit tricky in RAC environment, this post will provide the solution for both single and RAC environment.
INVSTIGATIONS and SOLUTION
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OEM Blackout Stuck in “Stop Pending” Status
There is one blackout stuck in “Stop Pending” Status for OEM 13c, when manually stopped it with errors:
Error: The blackout is already pending stop
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Now check from OEM console again, the problem is gone.
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