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https://issues.apache.org/jira/browse/HDDS-1370?focusedWorklogId=225710&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-225710
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ASF GitHub Bot logged work on HDDS-1370:
----------------------------------------
Author: ASF GitHub Bot
Created on: 10/Apr/19 17:04
Start Date: 10/Apr/19 17:04
Worklog Time Spent: 10m
Work Description: arp7 commented on pull request #715: HDDS-1370. Command
Execution in Datanode fails becaue of NPE
URL: https://github.com/apache/hadoop/pull/715#discussion_r274065343
##########
File path:
hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/common/states/datanode/RunningDatanodeState.java
##########
@@ -86,7 +86,16 @@ public void execute(ExecutorService executor) {
for (EndpointStateMachine endpoint : connectionManager.getValues()) {
Callable<EndpointStateMachine.EndPointStates> endpointTask
= getEndPointTask(endpoint);
- ecs.submit(endpointTask);
+ if (endpointTask != null) {
+ ecs.submit(endpointTask);
+ } else {
+ // This can happen if a task is taking more time than the timeOut
+ // specified for the task in await, and when it is completed the task
+ // has set the state to Shutdown, we may see the state as shutdown
+ // here. So, we need to Shutdown DatanodeStateMachine.
+ LOG.error("State is Shutdown in RunningDatanodeState");
+ context.setState(DatanodeStateMachine.DatanodeStates.SHUTDOWN);
Review comment:
I don't fully understand... unfortunately this existing stateContext logic
is 10x more complex than it needs to be.
However I think setting the state to SHUTDOWN should be safe so I will +1
the change.
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Issue Time Tracking
-------------------
Worklog Id: (was: 225710)
Time Spent: 1h (was: 50m)
> Command Execution in Datanode fails becaue of NPE
> -------------------------------------------------
>
> Key: HDDS-1370
> URL: https://issues.apache.org/jira/browse/HDDS-1370
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Datanode
> Affects Versions: 0.5.0
> Reporter: Mukul Kumar Singh
> Assignee: Bharat Viswanadham
> Priority: Major
> Labels: MiniOzoneChaosCluster, pull-request-available
> Time Spent: 1h
> Remaining Estimate: 0h
>
> The command execution on the datanode is failing with the following exception.
> {code}
> 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)
> {code}
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