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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-11584) s3a file block size set to 0 in getFileStatus
Date Sun, 22 Feb 2015 15:26:19 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-11584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14332222#comment-14332222
] 

Hudson commented on HADOOP-11584:
---------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2062 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2062/])
HADOOP-11584 s3a file block size set to 0 in getFileStatus. (Brahma Reddy Battula via stevel)
(stevel: rev 709ff99cff4124823bde631e272af7be9a22f83b)
* hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/TestS3ABlocksize.java
* hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileStatus.java
* hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AFileSystem.java
* hadoop-common-project/hadoop-common/CHANGES.txt
* hadoop-tools/hadoop-aws/src/test/resources/log4j.properties


> s3a file block size set to 0 in getFileStatus
> ---------------------------------------------
>
>                 Key: HADOOP-11584
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11584
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.6.0
>            Reporter: Dan Hecht
>            Assignee: Brahma Reddy Battula
>            Priority: Blocker
>             Fix For: 2.7.0
>
>         Attachments: HADOOP-10584-003.patch, HADOOP-111584.patch, HADOOP-11584-002.patch
>
>
> The consequence is that mapreduce probably is not splitting s3a files in the expected
way. This is similar to HADOOP-5861 (which was for s3n, though s3n was passing 5G rather than
0 for block size).
> FileInputFormat.getSplits() relies on the FileStatus block size being set:
> {code}
>         if (isSplitable(job, path)) {
>           long blockSize = file.getBlockSize();
>           long splitSize = computeSplitSize(blockSize, minSize, maxSize);
> {code}
> However, S3AFileSystem does not set the FileStatus block size field. From S3AFileStatus.java:
> {code}
>   // Files
>   public S3AFileStatus(long length, long modification_time, Path path) {
>     super(length, false, 1, 0, modification_time, path);
>     isEmptyDirectory = false;
>   }
> {code}
> I think it should use S3AFileSystem.getDefaultBlockSize() for each file's block size
(where it's currently passing 0).



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