@Override
public void initialize(MasterServices master, MetricsMaster metricsMaster)
throws KeeperException, IOException, UnsupportedOperationException {
this.master = master;
this.rootDir = master.getMasterFileSystem().getRootDir();
checkSnapshotSupport(master.getConfiguration(), master.getMasterFileSystem());
// get the configuration for the coordinator
Configuration conf = master.getConfiguration();
long wakeFrequency = conf.getInt(SNAPSHOT_WAKE_MILLIS_KEY, SNAPSHOT_WAKE_MILLIS_DEFAULT);
long timeoutMillis =
Math.max(
conf.getLong(
SnapshotDescriptionUtils.SNAPSHOT_TIMEOUT_MILLIS_KEY,
SnapshotDescriptionUtils.SNAPSHOT_TIMEOUT_MILLIS_DEFAULT),
conf.getLong(
SnapshotDescriptionUtils.MASTER_SNAPSHOT_TIMEOUT_MILLIS,
SnapshotDescriptionUtils.DEFAULT_MAX_WAIT_TIME));
int opThreads = conf.getInt(SNAPSHOT_POOL_THREADS_KEY, SNAPSHOT_POOL_THREADS_DEFAULT);
// setup the default procedure coordinator
String name = master.getServerName().toString();
ThreadPoolExecutor tpool = ProcedureCoordinator.defaultPool(name, opThreads);
ProcedureCoordinatorRpcs comms =
new ZKProcedureCoordinatorRpcs(
master.getZooKeeper(), SnapshotManager.ONLINE_SNAPSHOT_CONTROLLER_DESCRIPTION, name);
this.coordinator = new ProcedureCoordinator(comms, tpool, timeoutMillis, wakeFrequency);
this.executorService = master.getExecutorService();
resetTempDir();
}
@Override
public void cancel(String why) {
if (finished) return;
this.finished = true;
LOG.info(
"Stop taking snapshot="
+ ClientSnapshotDescriptionUtils.toString(snapshot)
+ " because: "
+ why);
CancellationException ce = new CancellationException(why);
monitor.receive(new ForeignException(master.getServerName().toString(), ce));
}