- [x] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [x] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 2.7.3
* Operating System version: Mac
* Java version: 1.8

### Steps to reproduce this issue

1.  `org/apache/dubbo/registry/support/ProviderConsumerRegTable.java:65` Type 'ProviderInvokerWrapper<>' does not define hashCode(), but is used in a hashing data-structure.
2. Class overrides equals but not hashCode.
* org.apache.dubbo.config.AbstractConfig
* org.apache.dubbo.registry.support.ProviderInvokerWrapper
* org.apache.dubbo.remoting.buffer.AbstractChannelBuffer

Pls. provide [GitHub address] to reproduce this issue.

### Expected Result

Whether the above suggestions can be fixed or have other considerations

### Actual Result

Is it considered a bug? Will it fix?

return capacity() - writerIndex;
    }
    @Override
    public void markReaderIndex() {
        markedReaderIndex = readerIndex;
    }
    @Override
    public void resetReaderIndex() {
        readerIndex(markedReaderIndex);
    }
    @Override
    public void markWriterIndex() {
        markedWriterIndex = writerIndex;
    }
    @Override
    public void resetWriterIndex() {
        writerIndex = markedWriterIndex;
    }
    @Override
    public void discardReadBytes() {
        if (readerIndex == 0) {
            return;
        }
        setBytes(0, this, readerIndex, writerIndex - readerIndex);
        writerIndex -= readerIndex;
        markedReaderIndex = Math.max(markedReaderIndex - readerIndex, 0);
        markedWriterIndex = Math.max(markedWriterIndex - readerIndex, 0);
        readerIndex = 0;
    }
    @Override