[HDDS-158] DatanodeStateMachine endPoint task throws NullPointerException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.2.1
• Component/s: Ozone Datanode
• Assignee: Nandakumar
• Reporter: Mukul Kumar Singh
• Created: 09/Jun/18 05:47
• Updated: 24/Aug/18 20:21
• Resolved: 12/Jun/18 15:11

Description

While running Ozone, I was able to see the following exception on the datanodes.

2018-06-09 00:15:09,541 [Datanode State Machine Thread - 0] ERROR      - Error in executing end point task.
java.util.concurrent.ExecutionException: java.lang.NullPointerException
        at java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.util.concurrent.FutureTask.get(FutureTask.java:192)
        at org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.computeNextContainerState(RunningDatanodeState.java:137)
        at org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.await(RunningDatanodeState.java:174)
        at org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.await(RunningDatanodeState.java:46)
        at org.apache.hadoop.ozone.container.common.statemachine.StateContext.execute(StateContext.java:233)
        at org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.start(DatanodeStateMachine.java:147)
        at org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.lambda$startDaemon$0(DatanodeStateMachine.java:294)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
        at com.google.protobuf.GeneratedMessage$FieldAccessorTable.getField(GeneratedMessage.java:1535)
        at com.google.protobuf.GeneratedMessage$FieldAccessorTable.access$100(GeneratedMessage.java:1449)
        at com.google.protobuf.GeneratedMessage$Builder.setField(GeneratedMessage.java:366)
        at org.apache.hadoop.ozone.container.common.states.endpoint.HeartbeatEndpointTask.addReports(HeartbeatEndpointTask.java:128)
        at org.apache.hadoop.ozone.container.common.states.endpoint.HeartbeatEndpointTask.call(HeartbeatEndpointTask.java:106)
        at org.apache.hadoop.ozone.container.common.states.endpoint.HeartbeatEndpointTask.call(HeartbeatEndpointTask.java:51)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        ... 1 more