private void dropSubsumedCheckpoints(long timestamp) {
Iterator<Map.Entry<Long, PendingCheckpoint>> entries = pendingCheckpoints.entrySet().iterator();
while (entries.hasNext()) {
PendingCheckpoint p = entries.next().getValue();
if (p.getCheckpointTimestamp() < timestamp) {
rememberRecentCheckpointId(p.getCheckpointId());
p.discard(userClassLoader);
onCancelCheckpoint(p.getCheckpointId());
entries.remove();
}
}
}
/**
* Receives a {@link DeclineCheckpoint} message and returns whether the message was associated
* with a pending checkpoint.
*
* @param message Checkpoint decline from the task manager
* @return Flag indicating whether the declined checkpoint was associated with a pending
* checkpoint.
*/
public boolean receiveDeclineMessage(DeclineCheckpoint message) throws Exception {
if (shutdown || message == null) {
return false;
}
if (!job.equals(message.getJob())) {
LOG.error("Received DeclineCheckpoint message for wrong job: {}", message);
return false;
}
final long checkpointId = message.getCheckpointId();
PendingCheckpoint checkpoint;
// Flag indicating whether the ack message was for a known pending
// checkpoint.
boolean isPendingCheckpoint;
synchronized (lock) {
// we need to check inside the lock for being shutdown as well, otherwise we
// get races and invalid error log messages
if (shutdown) {
return false;
}
checkpoint = pendingCheckpoints.get(checkpointId);
if (checkpoint != null && !checkpoint.isDiscarded()) {
isPendingCheckpoint = true;
LOG.info(
"Discarding checkpoint "
+ checkpointId
+ " because of checkpoint decline from task "
+ message.getTaskExecutionId());
pendingCheckpoints.remove(checkpointId);
checkpoint.discard(userClassLoader);
rememberRecentCheckpointId(checkpointId);
boolean haveMoreRecentPending = false;
Iterator<Map.Entry<Long, PendingCheckpoint>> entries =
pendingCheckpoints.entrySet().iterator();
while (entries.hasNext()) {
PendingCheckpoint p = entries.next().getValue();
if (!p.isDiscarded()
&& p.getCheckpointTimestamp() >= checkpoint.getCheckpointTimestamp()) {
haveMoreRecentPending = true;
break;
}
}
if (!haveMoreRecentPending && !triggerRequestQueued) {
LOG.info("Triggering new checkpoint because of discarded checkpoint " + checkpointId);
triggerCheckpoint(System.currentTimeMillis());
} else if (!haveMoreRecentPending) {
LOG.info(
"Promoting queued checkpoint request because of discarded checkpoint "
+ checkpointId);
triggerQueuedRequests();
}
} else if (checkpoint != null) {
// this should not happen
throw new IllegalStateException(
"Received message for discarded but non-removed checkpoint " + checkpointId);
} else {
// message is for an unknown checkpoint, or comes too late (checkpoint disposed)
if (recentPendingCheckpoints.contains(checkpointId)) {
isPendingCheckpoint = true;
LOG.info(
"Received another decline checkpoint message for now expired checkpoint attempt "
+ checkpointId);
} else {
isPendingCheckpoint = false;
}
}
}
return isPendingCheckpoint;
}
