@Override
public synchronized void start() {
setDaemon(true);
LOG.info("I'm starting a bookie with journal directory {}", journalDirectory.getName());
// Start DiskChecker thread
ledgerDirsManager.start();
if (indexDirsManager != ledgerDirsManager) {
indexDirsManager.start();
}
// start sync thread first, so during replaying journals, we could do checkpoint
// which reduce the chance that we need to replay journals again if bookie restarted
// again before finished journal replays.
syncThread.start();
// replay journals
try {
readJournal();
} catch (IOException ioe) {
LOG.error("Exception while replaying journals, shutting down", ioe);
shutdown(ExitCode.BOOKIE_EXCEPTION);
return;
} catch (BookieException be) {
LOG.error("Exception while replaying journals, shutting down", be);
shutdown(ExitCode.BOOKIE_EXCEPTION);
return;
}
// Do a fully flush after journal replay
try {
syncThread.requestFlush().get();
} catch (InterruptedException e) {
LOG.warn("Interrupting the fully flush after replaying journals : ", e);
Thread.currentThread().interrupt();
} catch (ExecutionException e) {
LOG.error("Error on executing a fully flush after replaying journals.");
shutdown(ExitCode.BOOKIE_EXCEPTION);
}
// start bookie thread
super.start();
// After successful bookie startup, register listener for disk
// error/full notifications.
ledgerDirsManager.addLedgerDirsListener(getLedgerDirsListener());
if (indexDirsManager != ledgerDirsManager) {
indexDirsManager.addLedgerDirsListener(getLedgerDirsListener());
}
ledgerStorage.start();
// set running here.
// since bookie server use running as a flag to tell bookie server whether it is alive
// if setting it in bookie thread, the watcher might run before bookie thread.
running = true;
try {
registerBookie(true).get();
} catch (Exception ie) {
LOG.error("Couldn't register bookie with zookeeper, shutting down : ", ie);
shutdown(ExitCode.ZK_REG_FAIL);
}
}
