[
https://issues.apache.org/jira/browse/KUDU-1437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Przemyslaw Maciolek updated KUDU-1437:
--------------------------------------
Description:
Putting a sequence of negative values to INT32 RLE-encoded column corrupts the
data after compaction.
The exact recipe to reproduce it is following:
1) Put a sequence of negative values in descending order to an INT32
RLE-encoded column (it's a primary key in my case, but maybe regular columns
are affected as well)
2) Wait for compaction
3) See you data converted to -1's
A Gist showing an example of data corruption is available here:
https://gist.github.com/pmaciolek/dfc6a95ff85145d23774cb5d1a9f5a4f (based on
{{sample.cc}} provided with Kudu sources, note that {{-std=c++11}} might need
to be added to the compiler flags)
was:
Putting a sequence of negative values to INT32 RLE-encoded column corrupts the
data after compaction.
The exact recipe to reproduce it is following:
1) Put a sequence of negative values in descending order to an INT32
RLE-encoded column (it's a primary key in my case, but maybe regular columns
are affected as well)
2) Wait for compaction
3) See you data converted to -1's
A Gist showing an example of data corruption is available here:
https://gist.github.com/pmaciolek/dfc6a95ff85145d23774cb5d1a9f5a4f (based on
`sample.cc` provided with Kudu sources, note that `-std=c++11` might need to be
added to the compiler flags)
> Negative values corruption for RLE-encoded INT32 columns
> --------------------------------------------------------
>
> Key: KUDU-1437
> URL: https://issues.apache.org/jira/browse/KUDU-1437
> Project: Kudu
> Issue Type: Bug
> Components: tserver
> Affects Versions: 0.6.0, 0.7.0, 0.8.0
> Reporter: Przemyslaw Maciolek
>
> Putting a sequence of negative values to INT32 RLE-encoded column corrupts
> the data after compaction.
> The exact recipe to reproduce it is following:
> 1) Put a sequence of negative values in descending order to an INT32
> RLE-encoded column (it's a primary key in my case, but maybe regular columns
> are affected as well)
> 2) Wait for compaction
> 3) See you data converted to -1's
> A Gist showing an example of data corruption is available here:
> https://gist.github.com/pmaciolek/dfc6a95ff85145d23774cb5d1a9f5a4f (based on
> {{sample.cc}} provided with Kudu sources, note that {{-std=c++11}} might need
> to be added to the compiler flags)
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
