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Posted to dev@parquet.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/07/23 15:51:00 UTC
[jira] [Commented] (PARQUET-1353) The random data generator used
for tests repeats the same value over and over again
[ https://issues.apache.org/jira/browse/PARQUET-1353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16553021#comment-16553021 ]
ASF GitHub Bot commented on PARQUET-1353:
-----------------------------------------
zivanfi opened a new pull request #504: PARQUET-1353: Fix random data generator.
URL: https://github.com/apache/parquet-mr/pull/504
The random data generator used for tests used to repeat the same value
over and over again.
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> The random data generator used for tests repeats the same value over and over again
> -----------------------------------------------------------------------------------
>
> Key: PARQUET-1353
> URL: https://issues.apache.org/jira/browse/PARQUET-1353
> Project: Parquet
> Issue Type: Bug
> Reporter: Zoltan Ivanfi
> Assignee: Zoltan Ivanfi
> Priority: Minor
> Labels: pull-request-available
>
> The RandomValues class returns references to its internal buffer as random values. This buffer gets a random value every time a new random value is requested, but since earlier values reference the same internal buffer, they get changed to the same value as well. So even if successive calls return different values each time, the actual list of these values will always consist of a single value repeated multiple times. For example:
> ||n-th call||returned value||accumulated list expected||accumulated list actual||
> |1|6C|6C|6C|
> |2|8F|6C 8F|8F 8F|
> |3|52|6C 8F 52|52 52 52|
> |4|B8|6C 8F 52 B8|B8 B8 B8 B8|
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