private void flushSnapshot() throws ForeignException {
if (regions.isEmpty()) {
// No regions on this RS, we are basically done.
return;
}
monitor.rethrowException();
// assert that the taskManager is empty.
if (taskManager.hasTasks()) {
throw new IllegalStateException(
"Attempting to take snapshot "
+ ClientSnapshotDescriptionUtils.toString(snapshot)
+ " but we currently have outstanding tasks");
}
// Add all hfiles already existing in region.
for (Region region : regions) {
// submit one task per region for parallelize by region.
taskManager.submitTask(new RegionSnapshotTask(region));
monitor.rethrowException();
}
// wait for everything to complete.
LOG.debug("Flush Snapshot Tasks submitted for " + regions.size() + " regions");
try {
taskManager.waitForOutstandingTasks();
} catch (InterruptedException e) {
LOG.error("got interrupted exception for " + getMemberName());
throw new ForeignException(getMemberName(), e);
}
}
/** Cancel threads if they haven't finished. */
@Override
public void cleanup(Exception e) {
LOG.info(
"Aborting all online FLUSH snapshot subprocedure task threads for '"
+ snapshot.getName()
+ "' due to error",
e);
try {
taskManager.cancelTasks();
} catch (InterruptedException e1) {
Thread.currentThread().interrupt();
}
}