lizhiboo commented on code in PR #4562:
URL: https://github.com/apache/rocketmq/pull/4562#discussion_r915373979
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client/src/main/java/org/apache/rocketmq/client/impl/producer/DefaultMQProducerImpl.java:
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@@ -671,8 +676,18 @@ private SendResult sendDefaultImpl(
private TopicPublishInfo tryToFindTopicPublishInfo(final String topic) {
TopicPublishInfo topicPublishInfo =
this.topicPublishInfoTable.get(topic);
if (null == topicPublishInfo || !topicPublishInfo.ok()) {
- this.topicPublishInfoTable.putIfAbsent(topic, new
TopicPublishInfo());
- this.mQClientFactory.updateTopicRouteInfoFromNameServer(topic);
+ try {
+ if(lockUpdatePublishInfo.tryLock(LOCK_TIMEOUT_MILLIS,
TimeUnit.MILLISECONDS)){
Review Comment:
We can add a parameter isEmpty2FetchFromNamesrv in
mQClientFactory.updateTopicRouteInfoFromNameServer method. if
isEmpty2FetchFromNamesrv is true, and double-check topic route info is also
empty after tryLock, then update from namesrv. if isEmpty2FetchFromNamesrv is
false, and double-check topic route info is not empty after tryLock, then do
not update from namesrv. MQClientInstance's scheduled task will update topic
route info reguarly.
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