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https://issues.apache.org/jira/browse/FLINK-5289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15732605#comment-15732605
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ASF GitHub Bot commented on FLINK-5289:
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GitHub user StefanRRichter opened a pull request:
https://github.com/apache/flink/pull/2969
[FLINK-5289] Meaningful exception when using value state on non-keyed…
This PR fixes [FLINK-5289] and introduces a meaningful exception when
registering a keyed state on non-keyed stream.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StefanRRichter/flink register-state-NPE
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2969.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 #2969
----
commit fba7f61ee6ff7155ee166ec01134f81f0b7f4457
Author: Stefan Richter <s.rich...@data-artisans.com>
Date: 2016-12-08T14:07:58Z
[FLINK-5289] Meaningful exception when using value state on non-keyed stream
----
> NPE when using value state on non-keyed stream
> ----------------------------------------------
>
> Key: FLINK-5289
> URL: https://issues.apache.org/jira/browse/FLINK-5289
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Timo Walther
> Assignee: Stefan Richter
>
> Using a {{ValueStateDescriptor}} and
> {{getRuntimeContext().getState(descriptor)}} on a non-keyed stream leads to
> {{NullPointerException}} which is not very helpful for users:
> {code}
> java.lang.NullPointerException
> at
> org.apache.flink.streaming.api.operators.StreamingRuntimeContext.getState(StreamingRuntimeContext.java:109)
> {code}
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