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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-2790) Error while reading from Amazon S3 via Hadoop File System
Date Tue, 22 Aug 2017 12:56:00 GMT

    [ https://issues.apache.org/jira/browse/BEAM-2790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16136748#comment-16136748
] 

ASF GitHub Bot commented on BEAM-2790:
--------------------------------------

GitHub user iemejia opened a pull request:

    https://github.com/apache/beam/pull/3744

    [BEAM-2790] Use byte[] instead of ByteBuffer to read from Hadoop FS

    Follow this checklist to help us incorporate your contribution quickly and easily:
    
     - [x] Make sure there is a [JIRA issue](https://issues.apache.org/jira/projects/BEAM/issues/)
filed for the change (usually before you start working on it).  Trivial changes like typos
do not require a JIRA issue.  Your pull request should address just this issue, without pulling
in other changes.
     - [x] Each commit in the pull request should have a meaningful subject line and body.
     - [x] Format the pull request title like `[BEAM-XXX] Fixes bug in ApproximateQuantiles`,
where you replace `BEAM-XXX` with the appropriate JIRA issue.
     - [x] Write a pull request description that is detailed enough to understand what the
pull request does, how, and why.
     - [x] Run `mvn clean verify` to make sure basic checks pass. A more thorough check will
be performed on your pull request automatically.
     - [ ] If this contribution is large, please file an Apache [Individual Contributor License
Agreement](https://www.apache.org/licenses/icla.pdf).
    
    ---


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/iemejia/beam BEAM-2790-fix-s3-read

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/beam/pull/3744.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #3744
    
----
commit 76f2d91bc9f612d4e98fe7d8099dffd36c47ff85
Author: Ismaël Mejía <iemejia@gmail.com>
Date:   2017-08-22T12:50:12Z

    [BEAM-2790] Use byte[] instead of ByteBuffer to read from Hadoop FS

----


> Error while reading from Amazon S3 via Hadoop File System
> ---------------------------------------------------------
>
>                 Key: BEAM-2790
>                 URL: https://issues.apache.org/jira/browse/BEAM-2790
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-extensions
>    Affects Versions: 2.0.0, 2.1.0
>            Reporter: Ismaël Mejía
>            Assignee: Ismaël Mejía
>
> If you try to use hadoop-aws with Beam to read from AWS S3 it breaks because S3AInputStream
(the implementation of Hadoop's FSDataInputStream) is not ByteBufferReadable. 
> [code]
> Exception in thread "main" java.lang.UnsupportedOperationException: Byte-buffer read
unsupported by input stream
> 	at org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:146)
> 	at org.apache.beam.sdk.io.hdfs.HadoopFileSystem$HadoopSeekableByteChannel.read(HadoopFileSystem.java:192)
> 	at org.apache.beam.sdk.io.TextSource$TextBasedReader.tryToEnsureNumberOfBytesInBuffer(TextSource.java:232)
> 	at org.apache.beam.sdk.io.TextSource$TextBasedReader.findSeparatorBounds(TextSource.java:166)
> 	at org.apache.beam.sdk.io.TextSource$TextBasedReader.readNextRecord(TextSource.java:198)
> 	at org.apache.beam.sdk.io.FileBasedSource$FileBasedReader.advanceImpl(FileBasedSource.java:481)
> 	at org.apache.beam.sdk.io.FileBasedSource$FileBasedReader.startImpl(FileBasedSource.java:476)
> 	at org.apache.beam.sdk.io.OffsetBasedSource$OffsetBasedReader.start(OffsetBasedSource.java:261)
> [code]



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