minxiangli opened a new issue #3923:
URL: https://github.com/apache/rocketmq/issues/3923
1. Please describe the issue you observed:
- What did you do (The steps to reproduce)?
1.run this demo
`public void test() throws InterruptedException {
for(int i = 0; i < 100; i++) {
for (int j = 0; j < 20; j++) {
CompletableFuture.runAsync(()->{
DefaultMQProducer producer = new
DefaultMQProducer("please_rename_unique_group_name");
producer.setNamesrvAddr("localhost:9876");
try {
producer.start();
} catch (MQClientException e) {
e.printStackTrace();
}finally {
producer.shutdown();
}
});
}
}
Thread.sleep(1000*60*60*5);
}
`
- What did you see instead?
2. Please tell us about your environment:
jre : 1.8
os: mac os
rocketmq-version : release-4.9.2
3. Other information (e.g. detailed explanation, logs, related issues,
suggestions how to fix, etc):
scheduledExecutorService.scheduleAtFixedRate() and
scheduledExecutorService.shutdown() are not synchronous methods。
You can't guarantee that there is only one “RequestHouseKeepingService”。
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