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https://issues.apache.org/jira/browse/HADOOP-11270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14198024#comment-14198024
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Thomas Demoor commented on HADOOP-11270:
----------------------------------------
Hi Venkata,
The behavior of different file systems has been documented (quite recently).
Have a look at
[http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/filesystem/index.html].
If you look at the contract for s3n (s3n.xml) you will find
<property>
<name>fs.contract.rejects-seek-past-eof</name>
<value>true</value>
</property>
> Seek behavior difference between NativeS3FsInputStream and DFSInputStream
> -------------------------------------------------------------------------
>
> Key: HADOOP-11270
> URL: https://issues.apache.org/jira/browse/HADOOP-11270
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Reporter: Venkata Puneet Ravuri
> Assignee: Venkata Puneet Ravuri
>
> There is a difference in behavior while seeking a given file present
> in S3 using NativeS3FileSystem$NativeS3FsInputStream and a file present in
> HDFS using DFSInputStream.
> If we seek to the end of the file incase of NativeS3FsInputStream, it fails
> with exception "java.io.EOFException: Attempted to seek or read past the end
> of the file". That is because a getObject request is issued on the S3 object
> with range start as value of length of file.
> This is the complete exception stack:-
> Caused by: java.io.EOFException: Attempted to seek or read past the end of
> the file
> at
> org.apache.hadoop.fs.s3native.Jets3tNativeFileSystemStore.processException(Jets3tNativeFileSystemStore.java:462)
> at
> org.apache.hadoop.fs.s3native.Jets3tNativeFileSystemStore.handleException(Jets3tNativeFileSystemStore.java:411)
> at
> org.apache.hadoop.fs.s3native.Jets3tNativeFileSystemStore.retrieve(Jets3tNativeFileSystemStore.java:234)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
> at org.apache.hadoop.fs.s3native.$Proxy17.retrieve(Unknown Source)
> at
> org.apache.hadoop.fs.s3native.NativeS3FileSystem$NativeS3FsInputStream.seek(NativeS3FileSystem.java:205)
> at
> org.apache.hadoop.fs.BufferedFSInputStream.seek(BufferedFSInputStream.java:96)
> at
> org.apache.hadoop.fs.BufferedFSInputStream.skip(BufferedFSInputStream.java:67)
> at java.io.DataInputStream.skipBytes(DataInputStream.java:220)
> at org.apache.hadoop.hive.ql.io.RCFile$ValueBuffer.readFields(RCFile.java:739)
> at
> org.apache.hadoop.hive.ql.io.RCFile$Reader.currentValueBuffer(RCFile.java:1720)
> at org.apache.hadoop.hive.ql.io.RCFile$Reader.getCurrentRow(RCFile.java:1898)
> at
> org.apache.hadoop.hive.ql.io.RCFileRecordReader.next(RCFileRecordReader.java:149)
> at
> org.apache.hadoop.hive.ql.io.RCFileRecordReader.next(RCFileRecordReader.java:44)
> at
> org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.doNext(HiveContextAwareRecordReader.java:339)
> ... 15 more
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