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https://issues.apache.org/jira/browse/HDFS-8760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938726#comment-14938726
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Hudson commented on HDFS-8760:
------------------------------
FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #465 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/465/])
HDFS-8760. Erasure Coding: reuse BlockReader when reading the same block
(jing9: rev f8f7a923b76abcd1d0242c15a536b20af1c1695e)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/util/StripedBlockUtil.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSStripedInputStream.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestWriteReadStripedFile.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/mover/Mover.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/StripedFileTestUtil.java
> Erasure Coding: reuse BlockReader when reading the same block in pread
> ----------------------------------------------------------------------
>
> Key: HDFS-8760
> URL: https://issues.apache.org/jira/browse/HDFS-8760
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Fix For: HDFS-7285
>
> Attachments: HDFS-8760-HDFS-7285.001.patch, HDFS-8760.000.patch
>
>
> Currently in pread, we create a new block reader for each aligned stripe even
> though these stripes belong to the same block. It's better to reuse them to
> avoid unnecessary block reader creation overhead. This can also avoid reading
> from the same bad DataNode.
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