You are viewing a plain text version of this content. The canonical link for it is here.

Posted to hdfs-dev@hadoop.apache.org by "Srikanth Upputuri (JIRA)" <ji...@apache.org> on 2014/09/17 12:34:34 UTC

[jira] [Created] (HDFS-7082) When replication factor equals number of data nodes, corrupt replica will never get substituted with good replica

Srikanth Upputuri created HDFS-7082:
---------------------------------------

             Summary: When replication factor equals number of data nodes, corrupt replica will never get substituted with good replica
                 Key: HDFS-7082
                 URL: https://issues.apache.org/jira/browse/HDFS-7082
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
            Reporter: Srikanth Upputuri
            Assignee: Srikanth Upputuri
            Priority: Minor


BlockManager will not invalidate a corrupt replica if this brings down the total number of replicas below replication factor (except if the corrupt replica has a wrong genstamp). On clusters where the replication factor = total data nodes, a new replica can not be created from a live replica as all the available datanodes already have a replica each. Because of this, the corrupt replicas will never be substituted with good replicas, so will never get deleted. Sooner or later all replicas may get corrupt and there will be no live replicas in the cluster for this block.




--
This message was sent by Atlassian JIRA
(v6.3.4#6332)