[HBASE-25023] NPE while shutdown master node

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Assignee: Junhong Xu
• Reporter: lujie
• Created: 14/Sep/20 07:08
• Updated: 28/Sep/20 07:46
• Resolved: 28/Sep/20 07:46

Description

while shutdown the master node, we can see the exception:

2020-09-14 06:48:29,530 ERROR [PEWorker-16] procedure2.ProcedureExecutor: CODE-BUG: Uncaught runtime exception: pid=111, ppid=64, state=RUNNABLE, locked=true; org.apache.hadoop.hbase.master.assignment.OpenRegionProcedure
java.lang.NullPointerException
        at org.apache.hadoop.hbase.master.assignment.RegionRemoteProcedureBase.execute(RegionRemoteProcedureBase.java:276)
        at org.apache.hadoop.hbase.master.assignment.RegionRemoteProcedureBase.execute(RegionRemoteProcedureBase.java:58)
        at org.apache.hadoop.hbase.procedure2.Procedure.doExecute(Procedure.java:962)
        at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execProcedure(ProcedureExecutor.java:1648)
        at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.executeProcedure(ProcedureExecutor.java:1395)
        at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.access$1100(ProcedureExecutor.java:78)
        at org.apache.hadoop.hbase.procedure2.ProcedureExecutor$WorkerThread.run(ProcedureExecutor.java:1965)

Issue Links

• is fixed by: HBASE-24117 Shutdown AssignmentManager before ProcedureExecutor may cause SCP to accidentally skip assigning a region
• links to: GitHub Pull Request #2404
• links to: GitHub Pull Request #2446