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Posted to common-dev@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2017/06/28 12:05:00 UTC

[jira] [Created] (HADOOP-14606) S3AInputStream: Handle skip(n) skipping < n bytes in a forward seek

Steve Loughran created HADOOP-14606:
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             Summary: S3AInputStream: Handle skip(n) skipping < n bytes in a forward seek
                 Key: HADOOP-14606
                 URL: https://issues.apache.org/jira/browse/HADOOP-14606
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: 2.8.1
            Reporter: Steve Loughran


There's some hints in the InputStream docs that {{skip(n)}} may skip <n bytes. Codepaths only seem to do this if read() returns -1, meaning end of stream is reached. Wh

If that happens when doing a forward seek via skip, then we have got our numbers wrong and are in trouble. Look for a negative response, log @ ERROR and revert to a close/reopen seek to an absolute position.

*I have no evidence of this acutally occurring*



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