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https://issues.apache.org/jira/browse/HDFS-7647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14312771#comment-14312771
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Milan Desai commented on HDFS-7647:
-----------------------------------
Hi [~arpitagarwal], I added those in because Findbugs was complaining that a
subclass (DatanodeInfoWithStorage) didn't override equals() and hashCode() and
recommending that I call the super and add an explanatory comment if I didn't
want to override. Revision 5 is the same exact as Revision 7 but without the
equals and hashCode overridden, so we can commit that one, but there will be
two additional FindBugs warnings.
> DatanodeManager.sortLocatedBlocks() sorts DatanodeInfos but not StorageIDs
> --------------------------------------------------------------------------
>
> Key: HDFS-7647
> URL: https://issues.apache.org/jira/browse/HDFS-7647
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Milan Desai
> Assignee: Milan Desai
> Attachments: HDFS-7647-2.patch, HDFS-7647-3.patch, HDFS-7647-4.patch,
> HDFS-7647-5.patch, HDFS-7647-6.patch, HDFS-7647-7.patch, HDFS-7647.patch
>
>
> DatanodeManager.sortLocatedBlocks() sorts the array of DatanodeInfos inside
> each LocatedBlock, but does not touch the array of StorageIDs and
> StorageTypes. As a result, the DatanodeInfos and StorageIDs/StorageTypes are
> mismatched. The method is called by FSNamesystem.getBlockLocations(), so the
> client will not know which StorageID/Type corresponds to which DatanodeInfo.
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