caigy commented on code in PR #4582:
URL: https://github.com/apache/rocketmq/pull/4582#discussion_r960554605
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broker/src/main/java/org/apache/rocketmq/broker/transaction/queue/TransactionalMessageServiceImpl.java:
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@@ -431,7 +431,7 @@ private MessageQueue getOpQueue(MessageQueue messageQueue) {
if (opQueue == null) {
opQueue = new
MessageQueue(TransactionalMessageUtil.buildOpTopic(),
messageQueue.getBrokerName(),
messageQueue.getQueueId());
- opQueueMap.put(messageQueue, opQueue);
+ opQueueMap.putIfAbsent(messageQueue, opQueue);
Review Comment:
It seems that if `opQueueMap` contains `messageQueue`, the newly created
`opQueue` would not be put in `opQueueMap` but returned.
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