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https://issues.apache.org/jira/browse/HADOOP-15871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16771325#comment-16771325
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Steve Loughran commented on HADOOP-15871:
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In S3A I'm going to have it return what the inner S3 stream says, returning "1"
otherwise, which is what that inner stream does. I'm not going near HDFS I'm
afraid
> Some input streams does not obey "java.io.InputStream.available" contract
> --------------------------------------------------------------------------
>
> Key: HADOOP-15871
> URL: https://issues.apache.org/jira/browse/HADOOP-15871
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs, fs/s3
> Reporter: Shixiong Zhu
> Priority: Major
>
> E.g, DFSInputStream and S3AInputStream return the size of the remaining
> available bytes, but the javadoc of "available" says it should "Returns an
> estimate of the number of bytes that can be read (or skipped over) from this
> input stream *without blocking* by the next invocation of a method for this
> input stream."
> I understand that some applications may rely on the current behavior. It
> would be great that there is an interface to document how "available" should
> be implemented.
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