[
https://issues.apache.org/jira/browse/HADOOP-12810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15149857#comment-15149857
]
Hudson commented on HADOOP-12810:
---------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #9309 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9309/])
HADOOP-12810. FileSystem#listLocatedStatus causes unnecessary RPC calls
(vinayakumarb: rev 96ea3094315bb1e1a5e268e3817c7fdedc3e9462)
* hadoop-common-project/hadoop-common/CHANGES.txt
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
> FileSystem#listLocatedStatus causes unnecessary RPC calls
> ---------------------------------------------------------
>
> Key: HADOOP-12810
> URL: https://issues.apache.org/jira/browse/HADOOP-12810
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs, fs/s3
> Affects Versions: 2.7.2
> Reporter: Ryan Blue
> Assignee: Ryan Blue
> Fix For: 2.7.3
>
> Attachments: HADOOP-12810.1.patch
>
>
> {{FileSystem#listLocatedStatus}} lists the files in a directory and then
> calls {{getFileBlockLocations(stat.getPath(), ...)}} for each instead of
> {{getFileBlockLocations(stat, ...)}}. That function with the path arg just
> calls {{getFileStatus}} to get another file status from the path and calls
> the file status version, so this ends up calling {{getFileStatus}}
> unnecessarily.
> This is particularly bad for S3, where {{getFileStatus}} is expensive.
> Avoiding the extra call improved input split calculation time for a data set
> in S3 by ~20x: from 10 minutes to 25 seconds.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
