[Bug] 修复 Java UDF 编译错误导致 Byzer Notebook 中的 job 不能被正确终止的问题。Fix a Java UDF compilation error that caused the Job in Byzer Notebook to fail to terminate correctly.

[chncaesar]

Steps to reproduce

1. Login byze.org/trial, and submit the following code

REGISTER ScriptUDF.`` AS echoFun WHERE
and lang="java"
and udfType="udf"
and code='''
import java.util.HashMap;
import java.util.Map;
public class Test {
    public Map<String, String> apply(String s) {
      Map m = new HashMap<>();
      m.put(s, s);
      return m;
  }
}
'''

select  echoFun("a") as output;

2. Notebook keeps running, and there's no error log.
3. However , exception can be found in logs/engine.log

/streaming/udf/java/sun283382a5e4f666a0ad0b3436c7d6a8bd/UDF.java:7: error: class Test is public, should be declared in a file named Test.java

[chncaesar]

Close this issue as its pr is merged