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Posted to common-issues@hadoop.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2018/10/22 21:29:00 UTC

[jira] [Created] (HADOOP-15871) Some input streams does not obey "java.io.InputStream.available" contract

Shixiong Zhu created HADOOP-15871:
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             Summary: 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


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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