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From "John Stoneham (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-728) Leaks a BatchScanner thread pool for each BatchDeleter
Date Mon, 13 Aug 2012 19:28:38 GMT
John Stoneham created ACCUMULO-728:

             Summary: Leaks a BatchScanner thread pool for each BatchDeleter
                 Key: ACCUMULO-728
             Project: Accumulo
          Issue Type: Bug
          Components: client
    Affects Versions: 1.3.6, 1.3.5, 1.3.7
            Reporter: John Stoneham
            Assignee: Billie Rinaldi

Each BatchDeleter (i.e., TabletServerBatchDeleter) causes a BatchScanner thread to leak. This
is because TabletServerBatchDeleter extends TabletServerBatchReader which opens a thread pool
on construction but no close() method is offered on the BatchDeleter interface.

Workaround: downcast BatchDeleter to either BatchScanner or TabletServerBatchDeleter, then
call close().

It appears the close() method is available on BatchDeleter from 1.4 forward, but this still
affects 1.3 series users (which is why I'm documenting it).

Since BatchDeleter is a one-off class - call delete() and forget - it might make sense for
it to close itself instead when complete.

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