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https://issues.apache.org/jira/browse/HADOOP-6177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740395#action_12740395
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Hong Tang commented on HADOOP-6177:
-----------------------------------
The root cause is because readChecksumChunk returns -1 when the fs input stream
reaches the end of the file. And in fill(), this leads to count == -1
(FSInputChecker.java:176). The fix is rather simple, adding the following line
at the end of fill():
{noformat}
count = readChecksumChunk(buf, 0, buf.length);
+ if (count < 0) count = 0;
{noformat}
> FSInputChecker.getPos() would return position greater than the file size
> ------------------------------------------------------------------------
>
> Key: HADOOP-6177
> URL: https://issues.apache.org/jira/browse/HADOOP-6177
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Hong Tang
> Assignee: Hong Tang
> Attachments: hadoop-6177-testcase.patch
>
>
> When using a small buffer (< 512 bytes) to read through the whole file, the
> final file position is 1+ the file size.
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