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https://issues.apache.org/jira/browse/SPARK-21377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16083033#comment-16083033
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Marcelo Vanzin commented on SPARK-21377:
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bq. we specify HBase related jars with --packages, but these dependencies are
not added into AM classpath
I'm a little confused about how the code in the PR is supposed to solve this.
Specifying {{\-\-packages}} doesn't automatically make jars available to the
AM. The files are just distributed to the cluster, but you still need code to
make the AM's class loader see those jars. There's code to do that for the
driver ({{ApplicationMaster.startUserApplication}}) but not for the AM
({{ApplicationMaster.runExecutorLauncher}}.
> Add a new configuration to extend AM classpath in yarn client mode
> ------------------------------------------------------------------
>
> Key: SPARK-21377
> URL: https://issues.apache.org/jira/browse/SPARK-21377
> Project: Spark
> Issue Type: Bug
> Components: YARN
> Affects Versions: 2.2.0
> Reporter: Yesha Vora
> Priority: Minor
>
> In this issue we have a long running Spark application with secure HBase,
> which requires {{HBaseCredentialProvider}} to get tokens periodically, we
> specify HBase related jars with {{\--packages}}, but these dependencies are
> not added into AM classpath, so when {{HBaseCredentialProvider}} tries to
> initialize HBase connections to get tokens, it will be failed.
> Currently because jars specified with {{\--jars}} or {{\--packages}} are not
> added into AM classpath, the only way to extend AM classpath is to use
> "spark.driver.extraClassPath" which supposed to be used in yarn cluster mode.
> So here we should figure out a solution either to put these dependencies to
> AM classpath or to extend AM classpath with correct configuration.
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