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https://issues.apache.org/jira/browse/YARN-9647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16891193#comment-16891193
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Eric Yang commented on YARN-9647:
---------------------------------
[~Jim_Brennan] I agree this approach is better optimization for performance and
code readability. [~magnum] Can you try Jim's approach? Thanks
> Docker launch fails when local-dirs or log-dirs is unhealthy.
> -------------------------------------------------------------
>
> Key: YARN-9647
> URL: https://issues.apache.org/jira/browse/YARN-9647
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 3.1.2
> Reporter: KWON BYUNGCHANG
> Priority: Major
> Attachments: YARN-9647.001.patch, YARN-9647.002.patch
>
>
> my /etc/hadoop/conf/container-executor.cfg
> {code}
> [docker]
> docker.allowed.ro-mounts=/data1/hadoop/yarn/local,/data2/hadoop/yarn/local
> docker.allowed.rw-mounts=/data1/hadoop/yarn/local,/data2/hadoop/yarn/local
> {code}
> if /data2 is unhealthy, docker launch fails although container can use
> /data1 as local-dir, log-dir
> error message is below
> {code}
> [2019-06-25 14:55:26.168]Exception from container-launch. Container id:
> container_e50_1561100493387_5185_01_000597 Exit code: 29 Exception message:
> Launch container failed Shell error output: Could not determine real path of
> mount '/data2/hadoop/yarn/local' Could not determine real path of mount
> '/data2/hadoop/yarn/local' Unable to find permitted docker mounts on disk
> Error constructing docker command, docker error code=16, error message='Mount
> access error' Shell output: main : command provided 4 main : run as user is
> magnum main : requested yarn user is magnum Creating script paths... Creating
> local dirs... [2019-06-25 14:55:26.189]Container exited with a non-zero exit
> code 29. [2019-06-25 14:55:26.192]Container exited with a non-zero exit code
> 29.
> {code}
> root cause is that normalize_mounts() in docker-util.c return -1 because it
> cannot resolve real path of /data2/hadoop/yarn/local.(note that /data2 is
> disk fault at this point)
> however disk of nm local dirs and nm log dirs can fail at any time.
> docker launch should succeed if there are available local dirs and log dirs.
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