Ufuk Celebi created FLINK-5279:
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Summary: Improve error message when trying to access keyed state
in non-keyed operator
Key: FLINK-5279
URL: https://issues.apache.org/jira/browse/FLINK-5279
Project: Flink
Issue Type: Improvement
Affects Versions: 1.1.3
Reporter: Ufuk Celebi
When trying to access keyed state in a non-keyed operator, the error message is
not very helpful. You get a trace like this:
{code}
java.lang.RuntimeException: Error while getting state
...
Caused by: java.lang.RuntimeException: State key serializer has not been
configured in the config. This operation cannot use partitioned state.
{code}
It will be helpful to users if this is more explicit to users, stating that the
API can only be used on keyed streams, etc.
If this applies to the current master as well, we should fix it there, too.
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