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Posted to hdfs-dev@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2014/11/24 17:42:12 UTC

[jira] [Created] (HDFS-7434) DatanodeID hashCode should not be mutable

Daryn Sharp created HDFS-7434:
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             Summary: DatanodeID hashCode should not be mutable
                 Key: HDFS-7434
                 URL: https://issues.apache.org/jira/browse/HDFS-7434
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: namenode
    Affects Versions: 2.0.0-alpha, 3.0.0
            Reporter: Daryn Sharp


Mutable hash codes may lead to orphaned instances in a collection.  Instances must always be removed prior to modification of hash code values, and re-inserted.  Although current code appears to do this, the mutable hash code is a landmine.



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