willimpo opened a new pull request, #3708:
URL: https://github.com/apache/eventmesh/pull/3708
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Fixes #<3707>.
### Motivation
when using rocketmq as eventmesh storage，and consumer groups are frequently
started and shutdown.
The number of threads in the process continues to increase，and eventually
led to Full GC
### Modifications
In the rocketmq eventmesh storage, we overwrite the
ConsumeMessageConcurrentlyService.java of rocketmq
but in the shutdown(long) method, we didn't do anything, this led to some
consumer threads are not recycled when consumer was shutdown
**the shutdown(long) method in ConsumeMessageConcurrentlyService.java**
```
public void shutdown(long awaitTerminateMillis) {
}
```
**where the ConsumeMessageConcurrentlyService.shutdown(long) method was
invoked**
```
DefaultMQPushConsumerImpl.java:
public synchronized void shutdown(long awaitTerminateMillis) {
switch (this.serviceState) {
case CREATE_JUST:
break;
case RUNNING:
// here invokes the shutdown method
this.consumeMessageService.shutdown(awaitTerminateMillis);
this.persistConsumerOffset();
this.mQClientFactory.unregisterConsumer(this.defaultMQPushConsumer.getConsumerGroup());
this.mQClientFactory.shutdown();
log.info("the consumer [{}] shutdown OK",
this.defaultMQPushConsumer.getConsumerGroup());
this.rebalanceImpl.destroy();
this.serviceState = ServiceState.SHUTDOWN_ALREADY;
break;
case SHUTDOWN_ALREADY:
break;
default:
break;
}
}
```
Therefore, my modification is to supplement the logic of shutdown (long) .
### Documentation
- Does this pull request introduce a new feature? (yes / no)
- If yes, how is the feature documented? (not applicable / docs / JavaDocs /
not documented)
- If a feature is not applicable for documentation, explain why?
- If a feature is not documented yet in this PR, please create a followup
issue for adding the documentation
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