[HBASE-15911] NPE in AssignmentManager.onRegionTransition after Master restart

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.3.0
• Component/s: master, Region Assignment
• Assignee: Ben Lau
• Reporter: Mikhail Antonov
• Created: 28/May/16 10:35
• Updated: 05/Oct/18 21:21

Description

16/05/27 17:49:18 ERROR ipc.RpcServer: Unexpected throwable object
java.lang.NullPointerException
at org.apache.hadoop.hbase.master.AssignmentManager.onRegionTransition(AssignmentManager.java:4364)
at org.apache.hadoop.hbase.master.MasterRpcServices.reportRegionStateTransition(MasterRpcServices.java:1421)
at org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:8623)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2239)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:116)
at org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:137)
at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:112)
at java.lang.Thread.run(Thread.java:745)

I'm pretty sure I've seen it before and more than once, but never got to dig in.