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From adeneche <...@git.apache.org>
Subject [GitHub] drill pull request: DRILL-4676: Foreman.moveToState can block fore...
Date Mon, 16 May 2016 21:35:34 GMT
Github user adeneche commented on a diff in the pull request:

    https://github.com/apache/drill/pull/503#discussion_r63430234
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/work/foreman/Foreman.java
---
    @@ -1221,6 +1223,12 @@ public void interrupted(final InterruptedException e) {
          *   to the user
          */
         public void moveToState(final QueryState newState, final Exception ex) {
    +      // if the current thread is the foreman thread, throw an exception
    +      // otherwise the foreman will be blocked forever on acceptExternalEvents
    +      if (myThreadRef == Thread.currentThread()) {
    --- End diff --
    
    This won't work when submitting remote fragments as the moveToState method can be called
either by the foreman thread or by an rpc thread.
    
    Anyway, I'm working on a better fix that would remove the latch completely.


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