hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4828) Make QJM epoch-related errors more understandable
Date Thu, 16 May 2013 18:15:16 GMT
Todd Lipcon created HDFS-4828:

             Summary: Make QJM epoch-related errors more understandable
                 Key: HDFS-4828
                 URL: https://issues.apache.org/jira/browse/HDFS-4828
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: qjm
    Affects Versions: 3.0.0, 2.0.5-beta
            Reporter: Todd Lipcon

Since we started running QJM on production clusters, we've found that users are very confused
by some of the error messages that it produces. For example, when a failover occurs and an
old NN gets fenced out, it sees errors about its epoch being out of date. We should amend
these errors to add text like "This is likely because another NameNode took over as Active."
Potentially we can even include the other NN's hostname, timestamp it became active, etc.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

View raw message