[jira] [Created] (FLINK-27104) ClassNotFound when submit jobs to session cluster with external jars

["Sitan Pang (Jira)" <ji...@apache.org>]

Sitan Pang created FLINK-27104:
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             Summary: ClassNotFound when submit jobs to session cluster with external jars
                 Key: FLINK-27104
                 URL: https://issues.apache.org/jira/browse/FLINK-27104
             Project: Flink
          Issue Type: Improvement
          Components: Client / Job Submission
    Affects Versions: 1.11.0
            Reporter: Sitan Pang


I'm trying to submit SQL jobs to session cluster on k8s, which need external local udfs jars.

I meet ClassNotFound Exception because of the reasons below:
 * 'pipeline.jars' will be overwritten by '-j' option which only accepts one jar.
 * 'pipeline.classpaths' will not be uploaded, so local files could not be found in TM.
 * 'pipelines.cached-files' will not be added to classpaths. In Task#createUserCodeClassloader and ClientUtils#buildUserCodeClassLoader, only 'pipeline.jars' and 'pipeline.classpaths' are added to user class loader. 
 
Only combining external jars into one could solve this, which means we need to re-create a new jar every time.
Is there a better way to submit with external jars?
Or could we make 'pipeline.jars' directly used by users?
 



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