NPE if RS restarts between REFRESH_PEER_SYNC_REPLICATION_STATE_ON_RS_BEGIN and TRANSIT_PEER_NEW_SYNC_REPLICATION_STATE

2018-11-06,12:55:25,980 WARN [RpcServer.default.FPBQ.Fifo.handler=251,queue=11,port=17100] org.apache.hadoop.hbase.master.replication.RefreshPeerProcedure: Refresh peer TestPeer for TRANSIT_SYNC_REPLICATION_STATE on c4-hadoop-tst-st54.bj,17200,1541479922465 failed
java.lang.NullPointerException via c4-hadoop-tst-st54.bj,17200,1541479922465:java.lang.NullPointerException: 
	at org.apache.hadoop.hbase.procedure2.RemoteProcedureException.fromProto(RemoteProcedureException.java:124)
	at org.apache.hadoop.hbase.master.MasterRpcServices.lambda$reportProcedureDone$4(MasterRpcServices.java:2303)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
	at org.apache.hadoop.hbase.master.MasterRpcServices.reportProcedureDone(MasterRpcServices.java:2298)
	at org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:13149)
	at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413)
	at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:130)
	at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338)
	at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318)
Caused by: java.lang.NullPointerException: 
	at org.apache.hadoop.hbase.wal.SyncReplicationWALProvider.peerSyncReplicationStateChange(SyncReplicationWALProvider.java:303)
	at org.apache.hadoop.hbase.replication.regionserver.PeerProcedureHandlerImpl.transitSyncReplicationPeerState(PeerProcedureHandlerImpl.java:216)
	at org.apache.hadoop.hbase.replication.regionserver.RefreshPeerCallable.call(RefreshPeerCallable.java:74)
	at org.apache.hadoop.hbase.replication.regionserver.RefreshPeerCallable.call(RefreshPeerCallable.java:34)
	at org.apache.hadoop.hbase.regionserver.handler.RSProcedureHandler.process(RSProcedureHandler.java:47)
	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:104)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)