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https://issues.apache.org/jira/browse/HADOOP-13321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15881309#comment-15881309
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Hudson commented on HADOOP-13321:
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SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11294 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11294/])
HADOOP-13321. Deprecate FileSystem APIs that promote inefficient call (liuml07:
rev a4d4a23785356e6a19d0db3a2dec8ae8cf861273)
* (edit)
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ChecksumFileSystem.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/ftp/FTPFileSystem.java
* (edit)
hadoop-tools/hadoop-openstack/src/main/java/org/apache/hadoop/fs/swift/snative/SwiftNativeFileSystem.java
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
> Deprecate FileSystem APIs that promote inefficient call patterns.
> -----------------------------------------------------------------
>
> Key: HADOOP-13321
> URL: https://issues.apache.org/jira/browse/HADOOP-13321
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs
> Affects Versions: 3.0.0-alpha3
> Reporter: Chris Nauroth
> Assignee: Mingliang Liu
> Fix For: 3.0.0-alpha3
>
> Attachments: HADOOP-13321.000.patch, HADOOP-13321.001.patch,
> HADOOP-13321.002.patch, HADOOP-13321.003.patch, HADOOP-13321.004.patch
>
>
> {{FileSystem}} contains several methods that act as convenience wrappers over
> calling {{getFileStatus}} and retrieving a single property of the returned
> {{FileStatus}}. These methods have a habit of fostering inefficient call
> patterns in applications, resulting in multiple redundant {{getFileStatus}}
> calls. For HDFS, this translates into wasteful NameNode RPC traffic. For
> file systems backed by cloud object stores, this translates into wasteful
> HTTP traffic. This issue proposes to deprecate these methods and instead
> encourage applications to call {{getFileStatus}} and then reuse the same
> {{FileStatus}} instance as needed.
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