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https://issues.apache.org/jira/browse/HADOOP-10987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14196130#comment-14196130
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Hudson commented on HADOOP-10987:
---------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #1922 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1922/])
HADOOP-10987. Provide an iterator-based listing API for FileSystem. Contributed
by Kihwal Lee. (kihwal: rev 67f13b58e4d41879845aa118186d984de2e312ed)
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestHarFileSystem.java
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FilterFileSystem.java
* hadoop-common-project/hadoop-common/CHANGES.txt
*
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/FileSystemTestWrapper.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestFileStatus.java
> Provide an iterator-based listing API for FileSystem
> ----------------------------------------------------
>
> Key: HADOOP-10987
> URL: https://issues.apache.org/jira/browse/HADOOP-10987
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 2.7.0
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Fix For: 2.7.0
>
> Attachments: HADOOP-10987.patch, HADOOP-10987.v2.patch,
> HADOOP-10987.v3.patch, HADOOP-10987.v4.branch-2.patch, HADOOP-10987.v4.patch,
> HADOOP-10987.v4_with_comment_fix.branch-2.patch,
> HADOOP-10987.v4_with_comment_fix.patch
>
>
> Iterator based listing methods already exist in {{FileContext}} for both
> simple listing and listing with locations. However, {{FileSystem}} lacks the
> former. From what I understand, it wasn't added to {{FileSystem}} because it
> was believed to be phased out soon. Since {{FileSystem}} is very well alive
> today and new features are getting added frequently, I propose adding an
> iterator based {{listStatus}} method. As for the name of the new method, we
> can use the same name used in {{FileContext}} : {{listStatusIterator()}}.
> It will be particularly useful when listing giant directories. Without this,
> the client has to build up a huge data structure and hold it in memory. We've
> seen client JVMs running out of memory because of this.
> Once this change is made, we can modify FsShell, etc. in followup jiras.
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