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https://issues.apache.org/jira/browse/FLINK-6182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15940172#comment-15940172
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ASF GitHub Bot commented on FLINK-6182:
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GitHub user uce opened a pull request:
https://github.com/apache/flink/pull/3606
[FLINK-6182] Fix possible NPE in SourceStreamTask
A user ran into this and reported confusing NPEs in the logs. This could
only happen if a source task is cancelled before it was invoked.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/uce/flink 6182-npe_source
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3606.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3606
----
commit b61ee091e843571e546146095842a0bf049a8910
Author: Ufuk Celebi <[email protected]>
Date: 2017-03-24T11:24:19Z
[FLINK-6182] Fix possible NPE in SourceStreamTask
----
> Fix possible NPE in SourceStreamTask
> ------------------------------------
>
> Key: FLINK-6182
> URL: https://issues.apache.org/jira/browse/FLINK-6182
> Project: Flink
> Issue Type: Bug
> Components: Local Runtime
> Reporter: Ufuk Celebi
> Priority: Minor
>
> If SourceStreamTask is cancelled before being invoked, `headOperator` is not
> set yet, which leads to an NPE. This is not critical but leads to noisy logs.
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