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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7674) NullPointerException in ContinuousFileMonitoringFunction close
Date Thu, 28 Sep 2017 12:59:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16184118#comment-16184118
] 

ASF GitHub Bot commented on FLINK-7674:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/flink/pull/4711


> NullPointerException in ContinuousFileMonitoringFunction close
> --------------------------------------------------------------
>
>                 Key: FLINK-7674
>                 URL: https://issues.apache.org/jira/browse/FLINK-7674
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming Connectors
>    Affects Versions: 1.4.0
>            Reporter: Ufuk Celebi
>            Assignee: Bowen Li
>            Priority: Minor
>             Fix For: 1.4.0
>
>
> If the ContinuousFileMonitoringFunction is closed before run is called (because initialization
fails), we get a NullPointerException, because checkpointLock has not been set.
> {code}
> synchronized (checkpointLock) {
>   globalModificationTime = Long.MAX_VALUE;
>   isRunning = false;
> }
> {code}
> This results in a follow up error log:
> {code}
> 2017-09-23 10:25:04,096 ERROR org.apache.flink.streaming.runtime.tasks.StreamTask   
       - Error during disposal of stream operator.
> java.lang.NullPointerException
> 	at org.apache.flink.streaming.api.functions.source.ContinuousFileMonitoringFunction.close(ContinuousFileMonitoringFunction.java:337)
> 	at org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:43)
> 	at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:126)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:429)
> 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:334)
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:702)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}



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