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https://issues.apache.org/jira/browse/FLINK-4628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15495945#comment-15495945
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Flavio Pompermaier commented on FLINK-4628:
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Could this be also the cause of
https://issues.apache.org/jira/browse/FLINK-4061?
> 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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