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https://issues.apache.org/jira/browse/HADOOP-18321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HADOOP-18321:
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Labels: pull-request-available (was: )
> Fix when to read an additional record from a BZip2 text file split
> ------------------------------------------------------------------
>
> Key: HADOOP-18321
> URL: https://issues.apache.org/jira/browse/HADOOP-18321
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.3.3
> Reporter: Ashutosh Gupta
> Assignee: Ashutosh Gupta
> Priority: Critical
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Fix data correctness issue with TextInputFormat that can occur when reading
> BZip2 compressed text files. When triggered this bug would cause a split to
> return the first record of the succeeding split that reads the next BZip2
> block, thereby duplicating that record.
> *When the bug is triggered?*
> The condition for the bug to occur requires that the flag
> "needAdditionalRecord" in CompressedSplitLineReader to be set to true by
> #fillBuffer at an inappropriate time: when we haven't read the remaining
> bytes of split. This can happen when the inDelimiter parameter is true while
> #fillBuffer is invoked while reading the next line. The inDelimiter parameter
> is true when either 1) the last byte of the buffer is a CR character ('\r')
> if using the default delimiters, or 2) the last bytes of the buffer are a
> common prefix of the delimiter if using a custom delimiter.
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