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https://issues.apache.org/jira/browse/FLINK-5289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15746105#comment-15746105
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ASF GitHub Bot commented on FLINK-5289:
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Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2969
+1 looks good. Will put this into my merge pipeline
> 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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