XiaoyiPeng opened a new issue #3492:
URL: https://github.com/apache/rocketmq/issues/3492
**BUG REPORT**
1. Please describe the issue you observed:
DefaultMQPushConsumerImpl#adjustThreadPool() has no effect. The code shown
below:
```
public void adjustThreadPool() {
long computeAccTotal = this.computeAccumulationTotal();
long adjustThreadPoolNumsThreshold =
this.defaultMQPushConsumer.getAdjustThreadPoolNumsThreshold();
long incThreshold = (long) (adjustThreadPoolNumsThreshold * 1.0);
long decThreshold = (long) (adjustThreadPoolNumsThreshold * 0.8);
if (computeAccTotal >= incThreshold) {
this.consumeMessageService.incCorePoolSize();
}
if (computeAccTotal < decThreshold) {
this.consumeMessageService.decCorePoolSize();
}
}
```
The method `ConsumeMessageService#incCorePoolSize()` has a empty body and
does nothing in their implementation class. For example, in class
`org.apache.rocketmq.client.impl.consumerConsumeMessageConcurrentlyService`
```
@Override
public void incCorePoolSize() {
}
@Override
public void decCorePoolSize() {
}
```
2. Please tell us about your environment:
Windows10
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