[jira] [Created] (FLINK-7936) Lack of synchronization w.r.t. taskManagers in MetricStore#add()

[Shang Yuanchun (Jira)]

Ted Yu created FLINK-7936:
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             Summary: Lack of synchronization w.r.t. taskManagers in MetricStore#add()
                 Key: FLINK-7936
                 URL: https://issues.apache.org/jira/browse/FLINK-7936
             Project: Flink
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


{code}
          String tmID = ((QueryScopeInfo.TaskManagerQueryScopeInfo) info).taskManagerID;
          tm = taskManagers.computeIfAbsent(tmID, k -> new TaskManagerMetricStore());
{code}
In other places, access to taskManagers is protected by lock on MetricStore.this



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