Kris20030907 commented on issue #10023:
URL: https://github.com/apache/rocketmq/issues/10023#issuecomment-3764853309
This repeated call will not cause an exception to be thrown, because
ThreadPoolExecutor treats repeated calls to shutdown idempotently. However,
this is still a code defect, so I submitted a fix.
```java
public void shutdown() {
final ReentrantLock mainLock = this.mainLock;
mainLock.lock();
try {
checkShutdownAccess();
advanceRunState(SHUTDOWN);
interruptIdleWorkers();
onShutdown(); // hook for ScheduledThreadPoolExecutor
} finally {
mainLock.unlock();
}
tryTerminate();
}
```
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