[jira] [Commented] (TIKA-2693) Tika 1.17 uses the wrong classloader for reflection

["Andreas Beeker (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TIKA-2693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16558986#comment-16558986 ] 

Andreas Beeker commented on TIKA-2693:
--------------------------------------

The NoClassDefFoundError happens, because I suggested to use POI 4.0.0, but 4.0.0 has API-breaks caused by [#62355|https://bz.apache.org/bugzilla/show_bug.cgi?id=62355] - and a moved POIXMLTextExtractor is one of them. So this has to be tested after Tika is adapted to POI 4.0.0.

> Tika 1.17 uses the wrong classloader for reflection
> ---------------------------------------------------
>
>                 Key: TIKA-2693
>                 URL: https://issues.apache.org/jira/browse/TIKA-2693
>             Project: Tika
>          Issue Type: Bug
>          Components: general
>    Affects Versions: 1.17
>            Reporter: Karl Wright
>            Priority: Major
>
> I don't know whether this was addressed in 1.18, but Tika seemingly uses the wrong classloader when loading some classes by reflection.
> In ManifoldCF, there's a two-tiered classloader hierarchy.  Tika runs in the higher class level.  Its expectation is that classes that are loaded via reflection use the classloader associated with the class that is resolving the reflection, NOT the thread classloader.  That's standard Java practice.
> But apparently there's a place where Tika doesn't do it that way:
> {code}
> Error tossed: org/apache/poi/POIXMLTextExtractor
> java.lang.NoClassDefFoundError: org/apache/poi/POIXMLTextExtractor
>         at org.apache.tika.parser.microsoft.ooxml.OOXMLParser.parse(OOXMLParser.java:106) ~[?:?]
>         at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) ~[?:?]
>         at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:280) ~[?:?]
>         at org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:143) ~[?:?]
>         at org.apache.manifoldcf.agents.transformation.tika.TikaParser.parse(TikaParser.java:74) ~[?:?]
> {code}



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