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### _Why are the changes needed?_ The abstract `ServiceDiscovery` class has two subclass (KyuubiServiceDiscovery and EngineServiceDiscovery), but only abstract class name is always printed in the log. ``` 2021-07-01 00:47:30.046 INFO kyuubi.SparkSQLEngineListener: Received ApplicationEnd Message from Spark at INITIALIZED, stopping 2021-07-01 00:47:30.047 INFO spark.SparkSQLEngine: Service: [ServiceDiscovery] is stopping. 2021-07-01 00:47:30.051 INFO imps.CuratorFrameworkImpl: backgroundOperationsLoop exiting ``` ### _How was this patch tested?_ - [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible - [x] Add screenshots for manual tests if appropriate - [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request ``` 2021-07-01 01:53:09.124 INFO zookeeper.ClientCnxn: Socket error occurred: localhost/127.0.0.1:2181: Connection refused 2021-07-01 01:53:09.128 INFO client.EngineServiceDiscovery: Service[EngineServiceDiscovery] is initialized. 2021-07-01 01:53:09.128 INFO spark.SparkSQLEngine: Service[SparkSQLEngine] is initialized. 2021-07-01 01:54:13.417 INFO kyuubi.SparkSQLEngineListener: Received ApplicationEnd Message from Spark at INITIALIZED, stopping 2021-07-01 01:54:13.418 INFO spark.SparkSQLEngine: Service: [EngineServiceDiscovery] is stopping. 2021-07-01 01:54:13.420 INFO imps.CuratorFrameworkImpl: backgroundOperationsLoop exiting ``` Closes #733 from timothy65535/work. Closes #732 31d8b04b [timothy65535] remove redundant constructor 2fa8e7b2 [timothy65535] [KYUUBI #732] Fix always print the name of abstract ServiceDiscovery class Authored-by: timothy65535 <timothy65535@163.com> Signed-off-by: Kent Yao <yao@apache.org> |
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