public void postClose(final boolean abortRequested) {
    try {
      execOperation(new RegionObserverOperationWithoutResult() {
        @Override
        public void call(RegionObserver observer) throws IOException {
          observer.postClose(this, abortRequested);
        }

        @Override
        public void postEnvCall() {
          shutdown(this.getEnvironment());
        }
      });
    } catch (IOException e) {
      LOG.warn(e.toString(), e);
    }
  }
Invoked after a region is closed
@param abortRequested true if the server is aborting
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java