hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Marco Nicosia (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3184) HOD gracefully exclude "bad" nodes during ring formation
Date Fri, 04 Apr 2008 23:32:24 GMT
HOD gracefully exclude "bad" nodes during ring formation

                 Key: HADOOP-3184
                 URL: https://issues.apache.org/jira/browse/HADOOP-3184
             Project: Hadoop Core
          Issue Type: Improvement
          Components: contrib/hod
            Reporter: Marco Nicosia

HOD clusters sometimes fail to allocate due to a single "bad" node. During ring formation,
the entire ring should not be dependent upon every single node being good. Instead, it should
either exclude any ring member that does not adequately join the ring in a specified amount
of time.

This is a frequent HOD user issue (although not directly caused by HOD).

Examples of bad nodes: Missing java, incorrect version of HOD or Hadoop, local name-cache
corrupt, slow network links, drives just beginning to fail, etc.

Many of these conditions are known, and we can monitor for those separately, but this enhancement
would shield users from unknown failure conditions that we haven't yet anticipated. This way,
a user will get a cluster, instead of hanging indefinitely.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message