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https://issues.apache.org/jira/browse/HDFS-7741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309256#comment-14309256
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Hudson commented on HDFS-7741:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk-Java8 #97 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/97/])
HDFS-7741. Remove unnecessary synchronized in FSDataInputStream and 
HdfsDataInputStream. (yliu) (yliu: rev 7b10ef0c3bfec9cdf20d6e2385b6d218809a37b9)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* 
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataInputStream.java
* 
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSDataInputStream.java


> Remove unnecessary synchronized in FSDataInputStream and HdfsDataInputStream
> ----------------------------------------------------------------------------
>
>                 Key: HDFS-7741
>                 URL: https://issues.apache.org/jira/browse/HDFS-7741
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Yi Liu
>            Assignee: Yi Liu
>            Priority: Minor
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7741.001.patch
>
>
> The {{synchronized}} for {{HdfsDataInputStream#getAllBlocks}} and 
> {{FSDataInputStream#seek}} are unnecessary.



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