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[ARTEMIS-502] AMQ224044, error acknowledging message: java.lang.NullPointerException, can happen sometimes during load

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Ingo Weiss 2016-04-25 09:56:51 +01:00 committed by Martyn Taylor
parent d947741a92
commit 82019cb3be
1 changed files with 5 additions and 0 deletions
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5
artemis-server/src/main/java/org/apache/activemq/artemis/core/server/impl/ServerConsumerImpl.java
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@ -930,6 +930,11 @@ public class ServerConsumerImpl implements ServerConsumer, ReadyListener {
synchronized (lock) { synchronized (lock) {
// This is an optimization, if the reference is the first one, we just poll it. // This is an optimization, if the reference is the first one, we just poll it.
// But first we need to make sure deliveringRefs isn't empty
if (deliveringRefs.isEmpty()) {
return null;
}
if (deliveringRefs.peek().getMessage().getMessageID() == messageID) { if (deliveringRefs.peek().getMessage().getMessageID() == messageID) {
return deliveringRefs.poll(); return deliveringRefs.poll();
} }