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From "Andrey (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-5551) NPE at SourceStreamTask
Date Wed, 18 Jan 2017 11:53:26 GMT

     [ https://issues.apache.org/jira/browse/FLINK-5551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrey updated FLINK-5551:
--------------------------
    Description: 
Prerequisites:

 * Configure hdfs-based backend for the job
 * cancel it using webapp admin

In logs during job cancel:
{code}
2017-01-17 16:22:08,756 INFO  org.apache.flink.streaming.runtime.tasks.StreamTask        
  - Using user-defined state backend: File State Backend @ hdfs://host:port/flink-checkpoints
2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task                  
  - Attempting to cancel task Source: Custom Source -> Filter (3/8)
2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task                  
  - Source: Custom Source -> Filter (3/8) switched to CANCELING
2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task                  
  - Triggering cancellation of task code Source: Custom Source -> Filter (3/8) (559a224c8ef78884db727dab0b2d5e99).
2017-01-17 16:22:08,756 ERROR org.apache.flink.runtime.taskmanager.Task                  
  - Error while canceling the task
java.lang.NullPointerException
        at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.cancelTask(SourceStreamTask.java:61)
        at org.apache.flink.streaming.runtime.tasks.StreamTask.cancel(StreamTask.java:349)
        at org.apache.flink.runtime.taskmanager.Task$TaskCanceler.run(Task.java:1214)
        at java.lang.Thread.run(Thread.java:745)

{code}

  was:
Prerequisites:

 * Configure hdfs-based backend for the job
 * cancel it using webapp admin

In logs during shutdown:
{code}
2017-01-17 16:22:08,756 INFO  org.apache.flink.streaming.runtime.tasks.StreamTask        
  - Using user-defined state backend: File State Backend @ hdfs://host:port/flink-checkpoints
2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task                  
  - Attempting to cancel task Source: Custom Source -> Filter (3/8)
2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task                  
  - Source: Custom Source -> Filter (3/8) switched to CANCELING
2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task                  
  - Triggering cancellation of task code Source: Custom Source -> Filter (3/8) (559a224c8ef78884db727dab0b2d5e99).
2017-01-17 16:22:08,756 ERROR org.apache.flink.runtime.taskmanager.Task                  
  - Error while canceling the task
java.lang.NullPointerException
        at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.cancelTask(SourceStreamTask.java:61)
        at org.apache.flink.streaming.runtime.tasks.StreamTask.cancel(StreamTask.java:349)
        at org.apache.flink.runtime.taskmanager.Task$TaskCanceler.run(Task.java:1214)
        at java.lang.Thread.run(Thread.java:745)

{code}


> NPE at SourceStreamTask
> -----------------------
>
>                 Key: FLINK-5551
>                 URL: https://issues.apache.org/jira/browse/FLINK-5551
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API
>    Affects Versions: 1.2.0
>            Reporter: Andrey
>
> Prerequisites:
>  * Configure hdfs-based backend for the job
>  * cancel it using webapp admin
> In logs during job cancel:
> {code}
> 2017-01-17 16:22:08,756 INFO  org.apache.flink.streaming.runtime.tasks.StreamTask   
       - Using user-defined state backend: File State Backend @ hdfs://host:port/flink-checkpoints
> 2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task             
       - Attempting to cancel task Source: Custom Source -> Filter (3/8)
> 2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task             
       - Source: Custom Source -> Filter (3/8) switched to CANCELING
> 2017-01-17 16:22:08,756 INFO  org.apache.flink.runtime.taskmanager.Task             
       - Triggering cancellation of task code Source: Custom Source -> Filter (3/8) (559a224c8ef78884db727dab0b2d5e99).
> 2017-01-17 16:22:08,756 ERROR org.apache.flink.runtime.taskmanager.Task             
       - Error while canceling the task
> java.lang.NullPointerException
>         at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.cancelTask(SourceStreamTask.java:61)
>         at org.apache.flink.streaming.runtime.tasks.StreamTask.cancel(StreamTask.java:349)
>         at org.apache.flink.runtime.taskmanager.Task$TaskCanceler.run(Task.java:1214)
>         at java.lang.Thread.run(Thread.java:745)
> {code}



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