[jira] [Updated] (MAPREDUCE-3302) Remove the last dependency call from org.apache.hadoop.record package in MR.

["Harsh J (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Harsh J updated MAPREDUCE-3302:
-------------------------------

     Target Version/s: 3.0.0  (was: 2.0.0-alpha, 3.0.0)
    Affects Version/s:     (was: 0.24.0)
                       3.0.0
    
> Remove the last dependency call from org.apache.hadoop.record package in MR.
> ----------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3302
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3302
>             Project: Hadoop Map/Reduce
>          Issue Type: Task
>          Components: client
>    Affects Versions: 3.0.0
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Minor
>         Attachments: MAPREDUCE-3302.patch
>
>
> SecureShuffleUtils provides the following helper:
> {code}
>   /**
>    * verify that hash equals to HMacHash(msg)
>    * @param newHash
>    * @return true if is the same
>    */
>   private static boolean verifyHash(byte[] hash, byte[] msg, SecretKey key) {
>     byte[] msg_hash = generateByteHash(msg, key);
>     return Utils.compareBytes(msg_hash, 0, msg_hash.length, hash, 0, hash.length) == 0;
>   }
> {code}
> The {{Utils}} class used there is {{org.apache.hadoop.record.Utils}}. With the {{record}} common package going away via HADOOP-7781, the internal (and also deprecated on the whole) {{compareBytes}} utility must be moved elsewhere.
> The {{Utils#compareBytes}} contains:
> {code}
> /** Lexicographic order of binary data. */
>   public static int compareBytes(byte[] b1, int s1, int l1,
>                                  byte[] b2, int s2, int l2) {
>     return WritableComparator.compareBytes(b1, s1, l1, b2, s2, l2);
>   }
> {code}
> Which looks like it can be replaced inline, as it appears to be a dummy wrapper call. I'll put up a patch with this inline replacement shortly for review.

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