[jira] [Created] (FLINK-16794) ClassNotFoundException caused by ClassLoader.getSystemClassLoader using impertinently

[Shang Yuanchun (Jira)]

victor.jiang created FLINK-16794:
------------------------------------

             Summary: ClassNotFoundException caused by ClassLoader.getSystemClassLoader using impertinently  
                 Key: FLINK-16794
                 URL: https://issues.apache.org/jira/browse/FLINK-16794
             Project: Flink
          Issue Type: Improvement
          Components: Client / Job Submission, Runtime / REST
    Affects Versions: 1.8.3, 1.8.2, 1.8.1, 1.8.0
            Reporter: victor.jiang


In same containerization environment，the context classloader is not the SystemClassLoader，it uses the customized classloader usually for the classes isolation ，so the ClassNotFoundException may be caused。recommends using getClass/Caller/ThreadCurrentContext 's ClassLoader。

The related sources below:

1.flink-clients\src\main\java\org\apache\flink\client\program\ClusterClient.java"(690,33): return getAccumulators(jobID, ClassLoader.getSystemClassLoader());
2.flink-clients\src\main\java\org\apache\flink\client\program\MiniClusterClient.java"(148,33): return getAccumulators(jobID, ClassLoader.getSystemClassLoader());
3.flink-runtime\src\main\java\org\apache\flink\runtime\blob\BlobUtils.java"(348,66): return (Throwable) InstantiationUtil.deserializeObject(bytes, ClassLoader.getSystemClassLoader());
4.flink-runtime\src\main\java\org\apache\flink\runtime\rest\messages\json\SerializedThrowableDeserializer.java"(52,68): return InstantiationUtil.deserializeObject(serializedException, ClassLoader.getSystemClassLoader());
5.flink-runtime\src\main\java\org\apache\flink\runtime\rpc\messages\RemoteRpcInvocation.java"(118,67): methodInvocation = serializedMethodInvocation.deserializeValue(ClassLoader.getSystemClassLoader());



--
This message was sent by Atlassian Jira
(v8.3.4#803005)