[jira] [Created] (FLINK-16913) ReadableConfigToConfigurationAdapter#getEnum throws UnsupportedOperationException

[Shang Yuanchun (Jira)]

Canbin Zheng created FLINK-16913:
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             Summary: ReadableConfigToConfigurationAdapter#getEnum throws UnsupportedOperationException
                 Key: FLINK-16913
                 URL: https://issues.apache.org/jira/browse/FLINK-16913
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Configuration
    Affects Versions: 1.10.0
            Reporter: Canbin Zheng
             Fix For: 1.10.1, 1.11.0
         Attachments: image-2020-04-01-16-46-13-122.png

Steps to reproduce the issue:
 # Set flink-conf.yaml
 ** state.backend: rocksdb
 ** state.checkpoints.dir: hdfs:///flink-checkpoints
 ** state.savepoints.dir: hdfs:///flink-checkpoints
 # Start a Kubernetes session cluster
 # Submit a job to the session cluster following a UnsupportedOperationException

{code:java}
 The program finished with the following exception:org.apache.flink.client.program.ProgramInvocationException: The main method caused an error: The adapter does not support this method
        at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:335)
        at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:205)
        at org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:143)
        at org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:659)
        at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:210)
        at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:890)
        at org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:963)
        at org.apache.flink.runtime.security.contexts.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30)
        at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:963)
Caused by: java.lang.UnsupportedOperationException: The adapter does not support this method
        at org.apache.flink.configuration.ReadableConfigToConfigurationAdapter.getEnum(ReadableConfigToConfigurationAdapter.java:258)
        at org.apache.flink.contrib.streaming.state.RocksDBStateBackend.<init>(RocksDBStateBackend.java:336)
        at org.apache.flink.contrib.streaming.state.RocksDBStateBackend.configure(RocksDBStateBackend.java:394)
        at org.apache.flink.contrib.streaming.state.RocksDBStateBackendFactory.createFromConfig(RocksDBStateBackendFactory.java:47)
        at org.apache.flink.contrib.streaming.state.RocksDBStateBackendFactory.createFromConfig(RocksDBStateBackendFactory.java:32)
        at org.apache.flink.runtime.state.StateBackendLoader.loadStateBackendFromConfig(StateBackendLoader.java:154)
        at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.loadStateBackend(StreamExecutionEnvironment.java:792)
        at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.configure(StreamExecutionEnvironment.java:761)
        at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.<init>(StreamExecutionEnvironment.java:217)
        at org.apache.flink.client.program.StreamContextEnvironment.<init>(StreamContextEnvironment.java:53)
        at org.apache.flink.client.program.StreamContextEnvironment.lambda$setAsContext$2(StreamContextEnvironment.java:103)
        at java.util.Optional.map(Optional.java:215)
        at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.getExecutionEnvironment(StreamExecutionEnvironment.java:1882)
        at org.apache.flink.streaming.examples.socket.SocketWindowWordCount.main(SocketWindowWordCount.java:62)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:321)
        ... 8 more
{code}
The call stack is:

I am wondering why we introduce {{ReadableConfigToConfigurationAdapter}} to wrap the {{Configuration}} but leave many of the methods in it to throw UnsupportedOperationException that causes problems. Why don't we use {{Configuration}} object directly?



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