[
https://issues.apache.org/jira/browse/PARQUET-739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wes McKinney resolved PARQUET-739.
----------------------------------
Resolution: Fixed
Fix Version/s: cpp-0.1
Issue resolved by pull request 175
[https://github.com/apache/parquet-cpp/pull/175]
> Rle-decoding uses static buffer that is shared accross threads
> --------------------------------------------------------------
>
> Key: PARQUET-739
> URL: https://issues.apache.org/jira/browse/PARQUET-739
> Project: Parquet
> Issue Type: Bug
> Components: parquet-cpp
> Reporter: Florian Scheibner
> Assignee: Florian Scheibner
> Fix For: cpp-0.1
>
>
> Reading two parquet files in parallel lead to a memory corruption that caused
> a crash. The columns are rle dictionary encoded strings in an uncompressed
> page, created with parquet-mr.
> Initial debugging showed that the indices for the dictionary returned by the
> rle decoder are garbage. So that data page got corrupted in memory. Reading
> the files in one thread works.
> I have a ColumnReader for each column and read one element from reach column
> to get a complete row.
> The indices are decoded into one global static buffer. So multiple threads
> all use the same buffer and overwrite each other's indices.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
