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https://issues.apache.org/jira/browse/HADOOP-11659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14367246#comment-14367246
]
Hudson commented on HADOOP-11659:
---------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk-Java8 #127 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/127/])
HADOOP-11659. o.a.h.FileSystem.Cache#remove should use a single hash map
lookup. Contributed by Brahma Reddy Battula. (aajisaka: rev
34117325b29f0f1bdbe21343e7fd07e9ad0af907)
*
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
* hadoop-common-project/hadoop-common/CHANGES.txt
> o.a.h.fs.FileSystem.Cache#remove should use a single hash map lookup
> --------------------------------------------------------------------
>
> Key: HADOOP-11659
> URL: https://issues.apache.org/jira/browse/HADOOP-11659
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 2.6.0
> Reporter: Gera Shegalov
> Assignee: Brahma Reddy Battula
> Priority: Minor
> Fix For: 2.8.0
>
> Attachments: HADDOOP-11659-004.patch, HADOOP-11659-002.patch,
> HADOOP-11659-003.patch, HADOOP-11659.patch
>
>
> The method looks up the same key in the same hash map potentially 3 times
> {code}
> if (map.containsKey(key) && fs == map.get(key)) {
> map.remove(key)
> {code}
> Instead it could do a single lookup
> {code}
> FileSystem cachedFs = map.remove(key);
> {code}
> and then test cachedFs == fs or something else.
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