// internal shutdown method to let shutdown bookie gracefully // when encountering exception synchronized int shutdown(int exitCode) { try { if (running) { // avoid shutdown twice // the exitCode only set when first shutdown usually due to exception found this.exitCode = exitCode; // mark bookie as in shutting down progress shuttingdown = true; // Shutdown Sync thread syncThread.shutdown(); // Shutdown disk checker ledgerDirsManager.shutdown(); if (indexDirsManager != ledgerDirsManager) { indexDirsManager.shutdown(); } // Shutdown journal journal.shutdown(); this.join(); // Shutdown the EntryLogger which has the GarbageCollector Thread running ledgerStorage.shutdown(); // close Ledger Manager try { activeLedgerManager.close(); activeLedgerManagerFactory.uninitialize(); } catch (IOException ie) { LOG.error("Failed to close active ledger manager : ", ie); } // Shutdown the ZK client if (zk != null) zk.close(); // Shutdown State Service stateService.shutdown(); // setting running to false here, so watch thread in bookie server know it only after bookie // shut down running = false; } } catch (InterruptedException ie) { LOG.error("Interrupted during shutting down bookie : ", ie); } return this.exitCode; }