[jira] [Created] (YARN-9083) Support remote directory localization in yarn native service

["Zhankun Tang (JIRA)" <ji...@apache.org>]

Zhankun Tang created YARN-9083:
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             Summary: Support remote directory localization in yarn native service
                 Key: YARN-9083
                 URL: https://issues.apache.org/jira/browse/YARN-9083
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Zhankun Tang
            Assignee: Zhankun Tang


When refining YARN-8714, found that the YARN localizer seems can handle remote directory directly. In FSDownload.java#downloadAndUnpack, it uses "FileUtil.copy" which can handle directory. This ability is added by YARN-2185.

For testing purpose, I changed distributedShell's client to let it localize an HDFS directory "mydir" directly. 
{code:java}
Path p = new Path("hdfs:///user/yarn/submarine/jobs/tf-job-001/staging" +
 "/mydir");
FileStatus scFileStatus = fs.getFileStatus(p);
LocalResource r =
 LocalResource.newInstance(URL.fromURI(p.toUri()),
 LocalResourceType.FILE, LocalResourceVisibility.APPLICATION,
 scFileStatus.getLen(), scFileStatus.getModificationTime());
localResources.put("mydir", r);{code}
And YARN localizer indeed downloads the HDFS dir to local for DistributedShell.
{code:java}
yarn@master0-VirtualBox:~/apache-hadoop-install-dir/hadoop-dev-workspace$ ls /tmp/hadoop-yarn/nm-local-dir/usercache/yarn/appcache/application_1543898305524_0004/filecache/13/mydir
1.py  2.py  dir1  test_kill9.sh
yarn@master0-VirtualBox:~/apache-hadoop-install-dir/hadoop-dev-workspace$ ls /tmp/hadoop-yarn/nm-local-dir/usercache/yarn/appcache/application_1543898305524_0004/container_1543898305524_0004_01_000001/ -l
total 20
lrwxrwxrwx 1 yarn hadoop  111 12月  5 10:08 AppMaster.jar -> /tmp/hadoop-yarn/nm-local-dir/usercache/yarn/appcache/application_1543898305524_0004/filecache/10/AppMaster.jar
lrwxrwxrwx 1 yarn hadoop  103 12月  5 10:08 mydir -> /tmp/hadoop-yarn/nm-local-dir/usercache/yarn/appcache/application_1543898305524_0004/filecache/13/mydir
{code}
But the YARN native service seems doesn't know this YARN localizer ability and blocked it.
{code:java}
2018-12-05 10:06:40,286 ERROR client.ApiServiceClient: srcFile=hdfs://192.168.50.191:9000/user/yarn/submarine/jobs/tf-job-001/staging/mydir is a directory, which is not supported.{code}
We should utilize this ability in yarn native service.



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