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https://issues.apache.org/jira/browse/HDFS-7120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14143541#comment-14143541
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Chris Nauroth commented on HDFS-7120:
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I was thinking it would be helpful to log something like ls output, with
inclusion of permissions. {{MiniDFSCluster#createPermissionsDiagnosisString}}
does something similar for tests already.
> When aborting NameNode or JournalNode due to metadata file problems, write
> the contents of the metadata directories and permissions to logs.
> --------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-7120
> URL: https://issues.apache.org/jira/browse/HDFS-7120
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: journal-node, namenode
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
>
> If the NameNode or JournalNode aborts due to an unexpected error in the
> metadata directories, often the root cause is that the metadata files are in
> an unexpected state, or permissions are broken on the directories. This
> issue proposes that during abort, we write additional information about the
> directory state and permissions to the logs. This can help speed up
> diagnosis, and ultimately recovery.
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