- [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?

public void ensureWritableBytes(int writableBytes) {
        if (writableBytes > writableBytes()) {
            throw new IndexOutOfBoundsException();
        }
    }
    @Override
    public void getBytes(int index, byte[] dst) {
        getBytes(index, dst, 0, dst.length);
    }
    @Override
    public void getBytes(int index, ChannelBuffer dst) {
        getBytes(index, dst, dst.writableBytes());
    }
    @Override
    public void getBytes(int index, ChannelBuffer dst, int length) {
        if (length > dst.writableBytes()) {
            throw new IndexOutOfBoundsException();
        }
        getBytes(index, dst, dst.writerIndex(), length);
        dst.writerIndex(dst.writerIndex() + length);
    }
    @Override
    public void setBytes(int index, byte[] src) {
        setBytes(index, src, 0, src.length);
    }
    @Override
    public void setBytes(int index, ChannelBuffer src) {
        setBytes(index, src, src.readableBytes());
    }
    @Override