[jira] [Created] (HDFS-6074) Under replicated blocks with ONE replica should get replication priority over blocks with more than one replica.

["Mike George (JIRA)" <ji...@apache.org>]

Mike George created HDFS-6074:
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             Summary: Under replicated blocks with ONE replica should get replication priority over blocks with more than one replica.
                 Key: HDFS-6074
                 URL: https://issues.apache.org/jira/browse/HDFS-6074
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 2.2.0
            Reporter: Mike George
            Priority: Minor


We had two nodes fail at the same time.   There were over 2000 blocks at higher risk of causing corrupt files since they were single replica.   There were over 40000 under replicated blocks with most having two replicas and the namenode priority to recreate missing replicas clearly placed no priority of single replica blocks.



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