mytang0

Great! Excluding other commits will make it easier to review.

Hello, please fix the license check problem.

> Hi @mytang0 Thanks for your contribution. Actually I want to discuss about reusing [ShardingSphere's cluster mode](https://github.com/apache/shardingsphere/tree/master/shardingsphere-mode/shardingsphere-mode-type/shardingsphere-cluster-mode/shardingsphere-cluster-mode-repository) in ElasticJob. Maintaining similar codes in sub-project will disperse developers' energies. You may...

Please take a look @TeslaCN

You can refer to pr #2111

PTAL @AlbumenJ

> Please merge the latest 3.1 branch to your branch ok, merged.

>  Test code: `@SuppressWarnings("unchecked") public static void listTest() throws Exception { Hessian2Serialization hessian2Serialization = new Hessian2Serialization(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ObjectOutput objectOutput = hessian2Serialization.serialize(null, baos); // List test...

The original problem of hessian2 makes it difficult to fix bug only through dubbo.

Linked to #3544, PR overlapped. @sanskar-thakur