ServerManager.getOnlineServer may miss some region servers when refreshing state in some procedure implementations

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76d634:45149.replicationSource,1] regionserver.HRegionServer(2351): STOPPED: Unexpected exception in RS:2;ece3af76d634:45149.replicationSource,1
2021-04-11T11:14:40,268 INFO  [RS:2;ece3af76d634:45149] regionserver.HeapMemoryManager(218): Stopping
2021-04-11T11:14:40,268 INFO  [MemStoreFlusher.0] regionserver.MemStoreFlusher$FlushHandler(384): MemStoreFlusher.0 exiting
2021-04-11T11:14:40,268 INFO  [RS:2;ece3af76d634:45149] flush.RegionServerFlushTableProcedureManager(118): Stopping region server flush procedure manager abruptly.
2021-04-11T11:14:40,270 INFO  [RS:2;ece3af76d634:45149] snapshot.RegionServerSnapshotManager(136): Stopping RegionServerSnapshotManager abruptly.
2021-04-11T11:14:40,270 INFO  [RS:2;ece3af76d634:45149] regionserver.HRegionServer(1146): aborting server ece3af76d634,45149,1618139661734
2021-04-11T11:14:40,272 ERROR [ReplicationExecutor-0.replicationSource,1-ece3af76d634,44745,1618139625245] regionserver.ReplicationSource(428): Unexpected exception in ReplicationExecutor-0.replicationSource,1-ece3af76d634,44745,1618139625245 currentPath=null
java.lang.IllegalStateException: Source should be active.
	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.initialize(ReplicationSource.java:547) ~[classes/:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
2021-04-11T11:14:40,272 DEBUG [ReplicationExecutor-0.replicationSource,1-ece3af76d634,44745,1618139625245] regionserver.HRegionServer(2576): Abort already in progress. Ignoring the current request with reason: Unexpected exception in ReplicationExecutor-0.replicationSource,1-ece3af76d634,44745,1618139625245