- [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 readBytes(OutputStream out, int length) throws IOException {
        checkReadableBytes(length);
        getBytes(readerIndex, out, length);
        readerIndex += length;
    }
    @Override
    public void skipBytes(int length) {
        int newReaderIndex = readerIndex + length;
        if (newReaderIndex > writerIndex) {
            throw new IndexOutOfBoundsException();
        }
        readerIndex = newReaderIndex;
    }
    @Override
    public void writeByte(int value) {
        setByte(writerIndex++, value);
    }
    @Override
    public void writeBytes(byte[] src, int srcIndex, int length) {
        setBytes(writerIndex, src, srcIndex, length);
        writerIndex += length;
    }
    @Override
    public void writeBytes(byte[] src) {
        writeBytes(src, 0, src.length);
    }
    @Override
    public void writeBytes(ChannelBuffer src) {
        writeBytes(src, src.readableBytes());