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https://issues.apache.org/jira/browse/HADOOP-18321?focusedWorklogId=786695&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-786695
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ASF GitHub Bot logged work on HADOOP-18321:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 30/Jun/22 16:18
Start Date: 30/Jun/22 16:18
Worklog Time Spent: 10m
Work Description: ashutoshcipher opened a new pull request, #4521:
URL: https://github.com/apache/hadoop/pull/4521
### Description of PR
Fix when to read an additional record from a BZip2 text file split
JIRA - HADOOP-18321
### How was this patch tested?
Added Units
### For code changes:
- [X] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
Issue Time Tracking
-------------------
Worklog Id: (was: 786695)
Remaining Estimate: 0h
Time Spent: 10m
> 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
> 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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