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https://issues.apache.org/jira/browse/HBASE-21422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16671532#comment-16671532
]
Duo Zhang commented on HBASE-21422:
-----------------------------------
I guess this is a test issue, when getting the state id, we will first get the
state, and then get the state id. But actually the state is converted from the
state id, and we have a EOF_STATE, where the state id is Integer.MIN_VALUE, so
there is state for it. And if the current state is EOF_STATE, then we will get
an NPE...
Not sure why it does not always happen. Let me dig more.
> NPE in TestMergeTableRegionsProcedure.testMergeWithoutPONR
> ----------------------------------------------------------
>
> Key: HBASE-21422
> URL: https://issues.apache.org/jira/browse/HBASE-21422
> Project: HBase
> Issue Type: Bug
> Components: proc-v2
> Reporter: Duo Zhang
> Priority: Major
>
> {noformat}
> 2018-10-31 16:22:01,302 ERROR [Time-limited test]
> assignment.TestMergeTableRegionsProcedure(305): error!
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.assignment.MergeTableRegionsProcedure.getStateId(MergeTableRegionsProcedure.java:386)
> at
> org.apache.hadoop.hbase.master.assignment.MergeTableRegionsProcedure.getStateId(MergeTableRegionsProcedure.java:84)
> at
> org.apache.hadoop.hbase.procedure2.StateMachineProcedure.getCurrentStateId(StateMachineProcedure.java:276)
> at
> org.apache.hadoop.hbase.master.procedure.MasterProcedureTestingUtility.testRecoveryAndDoubleExecution(MasterProcedureTestingUtility.java:414)
> at
> org.apache.hadoop.hbase.master.assignment.TestMergeTableRegionsProcedure.testMergeWithoutPONR(TestMergeTableRegionsProcedure.java:296)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298)
> at
> org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at java.lang.Thread.run(Thread.java:748)
> {noformat}
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