[jira] Updated: (HADOOP-3640) NativeS3FsInputStream read() method for reading a single byte is incorrect

["Robert Chansler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-3640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Chansler updated HADOOP-3640:
------------------------------------

    Component/s: fs/s3

> NativeS3FsInputStream read() method for reading a single byte is incorrect
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-3640
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3640
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs/s3
>    Affects Versions: 0.18.0
>            Reporter: Tom White
>            Assignee: Tom White
>             Fix For: 0.19.0
>
>         Attachments: hadoop-3640.patch
>
>
> From Albert Chern:
> I think there may be a bug in the read() method of NativeS3InputStream, which looks like this:
> {code}
> public synchronized int read() throws IOException {
>     int result = in.read();
>     if (result > 0) {
>         pos += result;
>     }
>     return result;
> }
> {code}
> The return value of InputStream.read() should be the next byte in the range 0 to 255, or -1 if there are no more bytes.  So shouldn't this method look something like this?
> {code}
> public synchronized int read() throws IOException {
>     int result = in.read();
>     if (result > -1) {
>         pos ++;
>     }
>     return result;
> }
> {code}

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