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https://issues.apache.org/jira/browse/YARN-4818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15196359#comment-15196359
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Brook Zhou commented on YARN-4818:
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You're right, it was some issue with our FileSystem implementation.
I will cancel this. Sorry about the confusion.
> AggregatedLogFormat.LogValue.write() incorrectly truncates files
> ----------------------------------------------------------------
>
> Key: YARN-4818
> URL: https://issues.apache.org/jira/browse/YARN-4818
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 2.8.0
> Reporter: Brook Zhou
> Assignee: Brook Zhou
> Labels: log-aggregation
> Fix For: 2.8.0
>
> Attachments: YARN-4818-v0.patch
>
>
> AggregatedLogFormat.LogValue.write() currently has a bug where it only writes
> in blocks of the buffer size (65535). This is because
> FileInputStream.read(byte[] buf) returns -1 if there are less than buf.length
> bytes remaining. In cases where the file size is not an exact multiple of
> 65535 bytes, the remaining bytes are truncated.
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