[jira] [Created] (FLINK-2223) Web frontend shows wrong accumulator results for latest job

[Shang Yuanchun (Jira)]

Till Rohrmann created FLINK-2223:
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             Summary: Web frontend shows wrong accumulator results for latest job
                 Key: FLINK-2223
                 URL: https://issues.apache.org/jira/browse/FLINK-2223
             Project: Flink
          Issue Type: Bug
            Reporter: Till Rohrmann
            Priority: Minor


The web frontend always displays for the latest finished job in the history that it has an accumulator with name {{JobID (SerializedListAccumulator)}} and value {{org.apache.flink.api.common.accumulators.SerializedListAccumulator}}. This seems to an artifact of the way we send accumulators via akka. Maybe the {{SerializedListAccumulator}} is always collected in the JobManager's {{AccumulatorManager}} no matter whether the job used accumulators or not. Then, this accumulator is returned to the web frontend as long as no other job was started.  



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