[HDFS-7120] When aborting NameNode or JournalNode due to metadata file problems, write the contents of the metadata directories and permissions to logs.

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: journal-node, namenode
• Assignee: Chris Nauroth
• Reporter: Chris Nauroth
• Created: 22/Sep/14 18:00
• Updated: 06/Jan/17 22:04

Description

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.