[jira] [Created] (FLINK-5289) NPE when using value state on non-keyed stream

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-5289:
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             Summary: 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


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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