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https://issues.apache.org/jira/browse/YARN-8812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16623439#comment-16623439
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Oleksandr Shevchenko commented on YARN-8812:
--------------------------------------------
Test Proxy#testNMProxyRPCRetry failed by a different cause. This test failed in
trunk without the patch.
> Containers fail during creating a symlink which started with hyphen for a
> resource file
> ---------------------------------------------------------------------------------------
>
> Key: YARN-8812
> URL: https://issues.apache.org/jira/browse/YARN-8812
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Oleksandr Shevchenko
> Assignee: Oleksandr Shevchenko
> Priority: Minor
> Attachments: YARN-8812.001.patch
>
>
> When we run some job and add a file with alias started with hyphen then a
> container fails during creating a symlink for a resource file:
> {noformat}
> yarn jar hadoop-mapreduce-examples.jar pi -files testfile#-symlink 1 1
> {noformat}
> or add a file to distributed cache in MR job by "job.addCacheFile"
> Containers fail if resource file has a symlink started with hyphen with the
> following error:
> {noformat}
> Stack trace: ExitCodeException exitCode=1:
> /tmp/hadoop-yarn/nm-local-dir/usercache/yarn/appcache/application_1537449069809_0022/container_e01_1537449069809_0022_02_000001/launch_container.sh
> ln: invalid option -- 'y'
> Try 'ln --help' for more information.
> at org.apache.hadoop.util.Shell.runCommand(Shell.java:572)
> at org.apache.hadoop.util.Shell.run(Shell.java:466)
> at org.apache.hadoop.util.Shell$ShellCommandExecutor.execute(Shell.java:768)
> at
> org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor.launchContainer(LinuxContainerExecutor.java:306)
> {noformat}
> The main cause of the problem is "launch_container.sh" script whitch contain
> the following command for creating a symlink:
> {noformat}
> ln -sf "/tmp/hadoop-yarn/nm-local-dir/usercache/yarn/filecache/49/testfile"
> "-symlink"
> {noformat}
> As the result "-symlink" parse as "-s" flag but not as a symlink name.
> The same job successfully passed when running on MRv1 but not on YARN since
> symlinks create in different ways. Unix systems support names which start
> with the hyphen.
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