[jira] [Updated] (AMBARI-24981) JournalNode may fail to start due to unreadable config file

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-24981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated AMBARI-24981:
------------------------------------
    Labels: pull-request-available  (was: )

> JournalNode may fail to start due to unreadable config file
> -----------------------------------------------------------
>
>                 Key: AMBARI-24981
>                 URL: https://issues.apache.org/jira/browse/AMBARI-24981
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-agent
>            Reporter: Doroszlai, Attila
>            Assignee: Doroszlai, Attila
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 2.8.0
>
>
> During startup, JournalNode reads config files that belong to YARN, not HDFS (eg. {{yarn-site.xml}}), if they are present in the Hadoop config dir.
> Ambari's {{File()}} provider creates files at the final location, then sets metadata (ownership and permissions).  This makes the file visible to other processes with possibly the wrong metadata.
> If agent-side parallel execution is enabled, JournalNode may be started concurrently with some YARN component.  JournalNode may encounter a config file that it cannot read, because the file's permissions and owner are still 440 and root, respectively, which causes it to shutdown:
> {noformat}
> ERROR conf.Configuration (Configuration.java:loadResource(2999)) - error parsing conf yarn-site.xml
> java.io.FileNotFoundException: /etc/hadoop/conf/yarn-site.xml (Permission denied)
> {noformat}



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