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https://issues.apache.org/jira/browse/DRILL-6353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16489608#comment-16489608
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ASF GitHub Bot commented on DRILL-6353:
---------------------------------------
parthchandra commented on a change in pull request #1259: DRILL-6353: Upgrade
Parquet MR dependencies
URL: https://github.com/apache/drill/pull/1259#discussion_r190698166
##########
File path:
exec/java-exec/src/test/java/org/apache/drill/exec/store/parquet/TestParquetMetadataCache.java
##########
@@ -737,6 +738,7 @@ public void testBooleanPartitionPruning() throws Exception
{
}
}
+ @Ignore
Review comment:
At what point do these tests fail? If they happen (as I suspect) during
planning or building the metadata cache, then we are looking at a bigger issue
that may need to be addressed before we switch to the upgraded version.
Essentially, pruning checks stats to determine whether the file should be
read or not. If the stats are corrupted and we use them anyway, the query will
return wrong results. If the stats are not corrupted and the Parquet library
refuses to read them because it cannot be sure of the state of the stats, then
the pruning will fail and the query will take too long to run.
If the tests are failing to execute because the Parquet library fails to
read the stats, then we will have a situation where queries that used to run
correctly will stop running after we upgrade to the new Parquet library, which
is likely to be *very* unpopular.
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> Upgrade Parquet MR dependencies
> -------------------------------
>
> Key: DRILL-6353
> URL: https://issues.apache.org/jira/browse/DRILL-6353
> Project: Apache Drill
> Issue Type: Task
> Reporter: Vlad Rozov
> Assignee: Vlad Rozov
> Priority: Major
> Fix For: 1.14.0
>
>
> Upgrade from a custom build {{1.8.1-drill-r0}} to Apache release {{1.10.0}}.
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