// 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();
}