clebertsuconic commented on code in PR #4029:
URL: https://github.com/apache/activemq-artemis/pull/4029#discussion_r850575993
##########
artemis-server/src/main/java/org/apache/activemq/artemis/core/postoffice/impl/PostOfficeImpl.java:
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@@ -1846,43 +1844,45 @@ private final class ExpiryReaper extends
ActiveMQScheduledComponent {
super(scheduledExecutorService, executor, checkPeriod, timeUnit,
onDemand);
}
- volatile CountDownLatch inUseLatch;
+ private Iterator<Queue> iterator;
+ // this is for logger.debug only
+ private Queue currentQueue;
@Override
- public void stop() {
- super.stop();
- // this will do a best effort to stop the current latch.
- // no big deal if it failed. this is just to optimize this component
stop.
- CountDownLatch latch = inUseLatch;
- if (latch != null) {
- latch.countDown();
+ public void run() {
+ if (iterator != null) {
+ logger.debugf("A previous reaping call has not finished yet, and
it is currently working on %s", currentQueue);
+ return;
}
+
+ iterator = iterableOf(getLocalQueues()).iterator();
+
+ moveNext();
}
+ private void done() {
+ executor.execute(this::moveNext);
+ }
- @Override
- public void run() {
- // The reaper thread should be finished case the PostOffice is gone
- // This is to avoid leaks on PostOffice between stops and starts
- for (Queue queue : iterableOf(getLocalQueues())) {
- if (!isStarted()) {
- break;
- }
- try {
- CountDownLatch latch = new CountDownLatch(1);
- this.inUseLatch = latch;
- queue.expireReferences(latch::countDown);
- // the idea is in fact to block the Reaper while the Queue is
executing reaping.
- // This would avoid another eventual expiry to be called if the
period for reaping is too small
- // This should also avoid bursts in CPU consumption because of
the expiry reaping
- if (!latch.await(10, TimeUnit.SECONDS)) {
- ActiveMQServerLogger.LOGGER.errorExpiringMessages(new
TimeoutException(queue.getName().toString()));
- }
- } catch (Exception e) {
- ActiveMQServerLogger.LOGGER.errorExpiringMessages(e);
- }
+ private void moveNext() {
+ Queue queue;
+ if (!iterator.hasNext() || !this.isStarted()) {
+ queue = null;
+ } else {
+ queue = iterator.next();
}
+
+ if (queue == null) {
Review Comment:
I added the currentQueue just for debugging. but I guess it could have a
double usage now...
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