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Posted to issues@hbase.apache.org by "Duo Zhang (JIRA)" <ji...@apache.org> on 2018/11/06 14:09:00 UTC
[jira] [Commented] (HBASE-21441) NPE if RS restarts between
REFRESH_PEER_SYNC_REPLICATION_STATE_ON_RS_BEGIN and
TRANSIT_PEER_NEW_SYNC_REPLICATION_STATE
[ https://issues.apache.org/jira/browse/HBASE-21441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16676798#comment-16676798 ]
Duo Zhang commented on HBASE-21441:
-----------------------------------
The fix is simple, the most important thing is the UT. Without the fix in Replication class, the transition to DA will hit the NPE issue in the description and can not finish.
> NPE if RS restarts between REFRESH_PEER_SYNC_REPLICATION_STATE_ON_RS_BEGIN and TRANSIT_PEER_NEW_SYNC_REPLICATION_STATE
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-21441
> URL: https://issues.apache.org/jira/browse/HBASE-21441
> Project: HBase
> Issue Type: Sub-task
> Components: Replication
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0
>
> Attachments: HBASE-21441.patch
>
>
> {noformat}
> 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)
> {noformat}
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