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https://issues.apache.org/jira/browse/HDFS-4265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14320976#comment-14320976
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Hudson commented on HDFS-4265:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #7110 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/7110/])
HDFS-4265. BKJM doesn't take advantage of speculative reads. Contributed by
Rakesh R. (aajisaka: rev 0d521e33262193e6cf709deaa69a54811a97ef6a)
*
hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/test/java/org/apache/hadoop/contrib/bkjournal/TestBookKeeperSpeculativeRead.java
*
hadoop-hdfs-project/hadoop-hdfs/src/contrib/bkjournal/src/main/java/org/apache/hadoop/contrib/bkjournal/BookKeeperJournalManager.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
> BKJM doesn't take advantage of speculative reads
> ------------------------------------------------
>
> Key: HDFS-4265
> URL: https://issues.apache.org/jira/browse/HDFS-4265
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: 2.2.0
> Reporter: Ivan Kelly
> Assignee: Rakesh R
> Fix For: 2.7.0
>
> Attachments: 0005-HDFS-4265.patch, 0006-HDFS-4265.patch,
> 0007-HDFS-4265.patch, 0009-HDFS-4265.patch, 001-HDFS-4265.patch,
> 002-HDFS-4265.patch, 003-HDFS-4265.patch, 004-HDFS-4265.patch
>
>
> BookKeeperEditLogInputStream reads entry at a time, so it doesn't take
> advantage of the speculative read mechanism introduced by BOOKKEEPER-336.
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