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https://issues.apache.org/jira/browse/DRILL-7393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16985203#comment-16985203
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ASF GitHub Bot commented on DRILL-7393:
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paul-rogers commented on issue #1910: DRILL-7393: Revisit Drill tests to ensure 
that patching is executed b…
URL: https://github.com/apache/drill/pull/1910#issuecomment-559887767
 
 
   The meta-question is why we still need this after all these years? Shouldn't 
we try to normalize our usage of Guava? Also, we moved Drill's use into a 
shaded jar so that, presumably, it won't conflict with other usages. So, do we 
still need this patching hack?
 
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> Revisit Drill tests to ensure that patching is executed before any test run
> ---------------------------------------------------------------------------
>
>                 Key: DRILL-7393
>                 URL: https://issues.apache.org/jira/browse/DRILL-7393
>             Project: Apache Drill
>          Issue Type: Task
>    Affects Versions: 1.16.0, 1.17.0
>            Reporter: Arina Ielchiieva
>            Assignee: Anton Gozhiy
>            Priority: Major
>              Labels: ready-to-commit
>
> Apache Drill patches some Protobuf and Guava classes (see GuavaPatcher, 
> ProtobufPatcher), patching should be done before classes to be patched are 
> loaded. That's why this operation is executed in static block in Drillbit 
> class.
> Some tests in java-exec module use Drillbit class, some extend DrillTest 
> class, both of them patch Guava. But there are some tests that do not call 
> patcher but load classes to be patched. For example, 
> {{org.apache.drill.exec.sql.TestSqlBracketlessSyntax}} loads Guava 
> Preconditions class. If such tests run before tests that require patching, 
> tests run will fail since patching won't be successful. Patchers code does 
> not fail application if patching was not complete, just logs warning 
> ({{logger.warn("Unable to patch Guava classes.", e);}}), so sometimes it hard 
> to identify unit tests failure root cause.
> We need to revisit all Drill tests to ensure that all of them extend common 
> test base class which patchers Protobuf and Guava classes in static block. 
> Also refactor Patcher classes to have assert to fail if patching fails during 
> unit testing if there are any problems.
> After all tests are revised, we can remove {{metastore-test}} execution from 
> main.xml in {{maven-surefire-plugin}} which was added to ensure that all 
> Metastore tests run in a separate JVM where patching is done in first place 
> since Iceberg Metastore heavily depends on patched Guava Preconditions class.



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