CollectionCloner::shutdown() should not block on resetting _verifyCollectionDroppedScheduler

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    • Repl 2018-01-29
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      CollectionCloner::shutdown() may block waiting for the implicit join inside RemoteCommandRetryScheduler's destructor (while calling reset() in "_verifyCollectionDroppedScheduler").

      https://github.com/mongodb/mongo/blob/cec131017b16e12b993ef8c90733feed4081fe0d/src/mongo/db/repl/collection_cloner.cpp?#L259

      collection_cloner.cpp
      void CollectionCloner::_cancelRemainingWork_inlock() {
    if (_arm) {
        Client::initThreadIfNotAlready();
        _killArmHandle = _arm->kill(cc().getOperationContext());
    }
    _countScheduler.shutdown();
    _listIndexesFetcher.shutdown();
    if (_establishCollectionCursorsScheduler) {
        _establishCollectionCursorsScheduler->shutdown();
    }
    if (_verifyCollectionDroppedScheduler) {
        _verifyCollectionDroppedScheduler->shutdown();
        _verifyCollectionDroppedScheduler.reset();
    }
    _dbWorkTaskRunner.cancel();
}

            Assignee:
            Benety Goh
            Reporter:
            Benety Goh
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              Created:
              Updated:
              Resolved: