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From "Eyal Zituny (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-19594) StreamingQueryListener fails to handle QueryTerminatedEvent if more then one listeners exists
Date Thu, 16 Feb 2017 07:02:41 GMT

    [ https://issues.apache.org/jira/browse/SPARK-19594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869368#comment-15869368
] 

Eyal Zituny commented on SPARK-19594:
-------------------------------------

that will work but i will have to remove the "final"  from the "postToAll" method which is
part of spark core

another option can be to change the method post(event: StreamingQueryListener.Event):

def post(event: StreamingQueryListener.Event) {
    event match {
      case s: QueryStartedEvent =>
        activeQueryRunIds.synchronized { activeQueryRunIds += s.runId }
        sparkListenerBus.post(s)
        // post to local listeners to trigger callbacks
        postToAll(s)
     case t: QueryTerminatedEvent =>
        // run all the listeners synchronized before removing the id from the list
        postToAll(t)
        activeQueryRunIds.synchronized { activeQueryRunIds -= t.runId }
      case _ =>
        sparkListenerBus.post(event)
    }
  }

> StreamingQueryListener fails to handle QueryTerminatedEvent if more then one listeners
exists
> ---------------------------------------------------------------------------------------------
>
>                 Key: SPARK-19594
>                 URL: https://issues.apache.org/jira/browse/SPARK-19594
>             Project: Spark
>          Issue Type: Bug
>          Components: Structured Streaming
>    Affects Versions: 2.1.0
>            Reporter: Eyal Zituny
>            Priority: Minor
>
> reproduce:
> *create a spark session
> *add multiple streaming query listeners
> *create a simple query
> *stop the query
> result -> only the first listener handle the QueryTerminatedEvent
> this might happen because the query run id is being removed from activeQueryRunIds once
the onQueryTerminated is called (StreamingQueryListenerBus:115)



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