[ 
https://issues.apache.org/jira/browse/BEAM-2790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Ismaël Mejía updated BEAM-2790:
-------------------------------
    Description: 
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}

  was:
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]


> 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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