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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4766) NM should not aggregate logs older than the retention policy
Date Mon, 23 May 2016 17:02:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-4766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296653#comment-15296653

Haibo Chen commented on YARN-4766:

The checkstyle warnings are against the protobuf-generated file. I'll try to clean up some
of the javadoc warnings.

> NM should not aggregate logs older than the retention policy
> ------------------------------------------------------------
>                 Key: YARN-4766
>                 URL: https://issues.apache.org/jira/browse/YARN-4766
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: log-aggregation, nodemanager
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>         Attachments: yarn4766.001.patch, yarn4766.002.patch, yarn4766.003.patch, yarn4766.004.patch,
yarn4766.004.patch, yarn4766.005.patch
> When a log aggregation fails on the NM the information is for the attempt is kept in
the recovery DB. Log aggregation can fail for multiple reasons which are often related to
HDFS space or permissions.
> On restart the recovery DB is read and if an application attempt needs its logs aggregated,
the files are scheduled for aggregation without any checks. The log files could be older than
the retention limit in which case we should not aggregate them but immediately mark them for
deletion from the local file system.

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