[HDDS-1370] Command Execution in Datanode fails becaue of NPE

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.5.0
• Fix Version/s: 0.4.1
• Component/s: Ozone Datanode
• Labels: MiniOzoneChaosCluster pull-request-available
• Target Version/s: 0.5.0
• Sprint: Done
• Assignee: Bharat Viswanadham
• Reporter: Mukul Kumar Singh
• Created: 02/Apr/19 18:31
• Updated: 05/Aug/19 14:46
• Resolved: 10/Apr/19 17:26

Description

The command execution on the datanode is failing with the following exception.

2019-04-02 23:56:30,434 ERROR statemachine.DatanodeStateMachine (DatanodeStateMachine.java:start(196)) - Unable to finish the execution.
java.lang.NullPointerException
        at java.util.concurrent.ExecutorCompletionService.submit(ExecutorCompletionService.java:179)
        at org.apache.hadoop.ozone.container.common.states.datanode.RunningDatanodeState.execute(RunningDatanodeState.java:89)
        at org.apache.hadoop.ozone.container.common.statemachine.StateContext.execute(StateContext.java:354)
        at org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.start(DatanodeStateMachine.java:183)
        at org.apache.hadoop.ozone.container.common.statemachine.DatanodeStateMachine.lambda$startDaemon$0(DatanodeStateMachine.java:338)
        at java.lang.Thread.run(Thread.java:748)

Issue Links

• links to: GitHub Pull Request #715
• links to: GIthub Pull Request #715