drbd_mysql:0_promote_0 (node=node2.cluster.org, call=11, rc=-2, status=Timed Out): unknown exec error
To clean it up you can use command crm_resource which checks health of resources:
[root@node1 ~]# crm_resource -P Waiting for 1 replies from the CRMd. OK [root@node1 ~]#
To check cluster’s status run crm_mon again, warning message should be gone.
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