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

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

    [ https://issues.apache.org/jira/browse/FLINK-27104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17518633#comment-17518633 ] 

Sitan Pang commented on FLINK-27104:
------------------------------------

Maybe we could add a new option 'pipeline.external-resorces' to set external jars for job.

For session job, 'pipeline.external-resorces' will be added into 'pipeline.jars', so it will be uploaded by clusterClient and loaded by userClassLoader.

> 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
>            Priority: Minor
>
> 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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