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https://issues.apache.org/jira/browse/MAPREDUCE-3302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Joseph Evans updated MAPREDUCE-3302:
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Target Version/s: 2.0.0, 3.0.0 (was: 0.23.1)
> 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: 0.24.0
> 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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