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https://issues.apache.org/jira/browse/YARN-1175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13762379#comment-13762379
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Tassapol Athiapinya commented on YARN-1175:
-------------------------------------------
Also, for distributed shell of running echo, AppMaster.stdout which does not
print out anything, has LogLength of 0. There is inconsistency between the app
master which does not call any print command and echo stdout which calls prints
with "" (no end of line).
> LogLength shown in $ yarn logs is 1 character longer than actual stdout
> -----------------------------------------------------------------------
>
> Key: YARN-1175
> URL: https://issues.apache.org/jira/browse/YARN-1175
> Project: Hadoop YARN
> Issue Type: Bug
> Components: applications/distributed-shell
> Reporter: Tassapol Athiapinya
> Fix For: 2.1.1-beta
>
>
> Run distributed shell with -shell_command "pwd". Do $ yarn logs on that
> application.
> Count number of characters in Log Contents field. Number of characters will
> be smaller than LogLength field by one.
> {code:title=mock-up yarn logs output}
> $ /usr/bin/yarn logs -applicationId application_1378424977532_0088
> ...
> LogType: stdout
> LogLength: 87
> Log Contents:
> /mypath/appcache/application_1378424977532_0088/container_1378424977532_0088_01_000002
> {code}
> ----
> {panel}
> Th length of
> "/mypath/appcache/application_1378424977532_0088/container_1378424977532_0088_01_000002"
> is 86.
> {panel}
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