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[jira] [Created] (FLINK-10916) Include duplicated user-specified uid into error message


Kirill Mikheev created FLINK-10916:
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             Summary: Include duplicated user-specified uid into error message
                 Key: FLINK-10916
                 URL: https://issues.apache.org/jira/browse/FLINK-10916
             Project: Flink
          Issue Type: Improvement
          Components: DataStream API
            Reporter: Kirill Mikheev


If user provides non-unique uid for a stream, error message does not give a clue where does the error reside in client code. Including user-provided uid into error message should narrow the search area.

In 1.6.2 we see the message that was introduced in 1.2.0:
{noformat}
java.lang.IllegalArgumentException: Hash collision on user-specified ID. Most likely cause is a non-unique ID. Please check that all IDs specified via uid(String) are unique. at org.apache.flink.streaming.api.graph.StreamGraphHasherV2.generateNodeHash(StreamGraphHasherV2.java:180) at org.apache.flink.streaming.api.graph.StreamGraphHasherV2.traverseStreamGraphAndGenerateHashes(StreamGraphHasherV2.java:112) at org.apache.flink.streaming.api.graph.StreamingJobGraphGenerator.createJobGraph(StreamingJobGraphGenerator.java:134) at <rest of stack>.
{noformat}



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