- [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?

}
    @Override
    public void writeBytes(ChannelBuffer src, int length) {
        if (length > src.readableBytes()) {
            throw new IndexOutOfBoundsException();
        }
        writeBytes(src, src.readerIndex(), length);
        src.readerIndex(src.readerIndex() + length);
    }
    @Override
    public void writeBytes(ChannelBuffer src, int srcIndex, int length) {
        setBytes(writerIndex, src, srcIndex, length);
        writerIndex += length;
    }
    @Override
    public void writeBytes(ByteBuffer src) {
        int length = src.remaining();
        setBytes(writerIndex, src);
        writerIndex += length;
    }
    @Override
    public int writeBytes(InputStream in, int length) throws IOException {
        int writtenBytes = setBytes(writerIndex, in, length);
        if (writtenBytes > 0) {
            writerIndex += writtenBytes;
        }
        return writtenBytes;
    }
    @Override
    public ChannelBuffer copy() {