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https://issues.apache.org/jira/browse/FLINK-2823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14946630#comment-14946630
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Maximilian Michels commented on FLINK-2823:
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I think MapR FS comes with its own file system schema {{maprfs://}}.
{{file://}} should really indicate that the setup is not correct.
Only checking the environment variables won't cover all cases. You can, for
instance, configure Hadoop using resource files in the class path.
> YARN client should report a proper exception if Hadoop Env variables are not
> set
> --------------------------------------------------------------------------------
>
> Key: FLINK-2823
> URL: https://issues.apache.org/jira/browse/FLINK-2823
> Project: Flink
> Issue Type: Bug
> Components: YARN Client
> Affects Versions: 0.10
> Reporter: Stephan Ewen
> Fix For: 0.10
>
>
> The important variables are {{HADOOP_HOME}} and {{HADOOP_CONF_DIR}}.
> If none of the two environment variables are set, the YARN client does not
> pick the correct settings / file system to successfully deploy a job.
> The YARN client should throw a good exception. Right now, this requires some
> tricky debugging to find the cause of the problem.
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