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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4628) User class loader unavailable during input split assignment
Date Thu, 22 Sep 2016 10:44:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15512926#comment-15512926

ASF GitHub Bot commented on FLINK-4628:

Github user StephanEwen commented on the issue:

    Merging this...

> User class loader unavailable during input split assignment
> -----------------------------------------------------------
>                 Key: FLINK-4628
>                 URL: https://issues.apache.org/jira/browse/FLINK-4628
>             Project: Flink
>          Issue Type: Bug
>          Components: JobManager
>    Affects Versions: 1.2.0, 1.1.2
>            Reporter: Maximilian Michels
>            Assignee: Maximilian Michels
>            Priority: Minor
> {{InputFormat}}\s runs through two configuration phases in the {{JobManager}}.
> 1. initializeOnMaster which runs the configure() method on the InputFormat
> 2. createInputSplits when the ExecutionJobVertex is created
> In 1 we set the user class loader as the context class loader of the executing thread.
> In 2 we only have the system class loader available. If any classes need to be loaded
then, we have a problem. Some InputFormats rely on code which lazily load classes at different
points in time.
> In particular, this is a problem with the HBase TableInputFormat in the latest master.
> We should make the user class loader available when creating input splits.

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