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From keith-turner <>
Subject [GitHub] accumulo pull request: ACCUMULO-3509: Allow cleanup state to be ke...
Date Mon, 04 Jan 2016 17:11:34 GMT
Github user keith-turner commented on a diff in the pull request:
    --- Diff: server/tserver/src/main/java/org/apache/accumulo/tserver/tablet/
    @@ -38,100 +40,126 @@
       private ScanDataSource isolatedDataSource;
       private boolean sawException = false;
       private boolean scanClosed = false;
    +  protected Semaphore scannerSemaphore;
       Scanner(Tablet tablet, Range range, ScanOptions options) {
         this.tablet = tablet;
         this.range = range;
         this.options = options;
    +    scannerSemaphore = new Semaphore(1, true);
    --- End diff --
    The expense of fairness may not be a problem.  I suspect the expense of fairness is an
issue for semaphores that are frequently accessed by many threads, which is not the case here.

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