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https://issues.apache.org/jira/browse/YARN-1450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834382#comment-13834382
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Binglin Chang commented on YARN-1450:
-------------------------------------
bq. So, if we launch the AM with --shell_command, we will meet the same issue
as before (can not allow multiple commands separating with ";" or "|"). Right ?
Actually there is no issue, the AM is started standalone(no client -> RM -> NM
-> launch AM), we don't need to care about escaping/unescaping issues, allow
multiple commands separating with ";", ";", "|" or env variable should be fine.
There is nothing wrong about --shell_command, anything you can write to a file
you can pass with cmdline, the issue in YARN-1303 is cuased by client try to
construct a whole cmd without proper escaping support.
> TestUnmanagedAMLauncher#testDSShell fails on trunk
> --------------------------------------------------
>
> Key: YARN-1450
> URL: https://issues.apache.org/jira/browse/YARN-1450
> Project: Hadoop YARN
> Issue Type: Bug
> Components: applications/distributed-shell
> Reporter: Akira AJISAKA
> Assignee: Binglin Chang
> Attachments: YARN-1450.v1.patch,
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.TestUnmanagedAMLauncher-output.txt,
>
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.TestUnmanagedAMLauncher.txt
>
>
> TestUnmanagedAMLauncher fails on trunk. The console output is
> {code}
> Running
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.TestUnmanagedAMLauncher
> Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 35.937 sec
> <<< FAILURE! - in
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.TestUnmanagedAMLauncher
> testDSShell(org.apache.hadoop.yarn.applications.unmanagedamlauncher.TestUnmanagedAMLauncher)
> Time elapsed: 14.558 sec <<< ERROR!
> java.lang.RuntimeException: Failed to receive final expected state in
> ApplicationReport, CurrentState=ACCEPTED,
> ExpectedStates=FINISHED,FAILED,KILLED
> at
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.UnmanagedAMLauncher.monitorApplication(UnmanagedAMLauncher.java:447)
> at
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.UnmanagedAMLauncher.run(UnmanagedAMLauncher.java:352)
> at
> org.apache.hadoop.yarn.applications.unmanagedamlauncher.TestUnmanagedAMLauncher.testDSShell(TestUnmanagedAMLauncher.java:145)
> {code}
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