[jira] [Commented] (TIKA-1507) Under OSGi, ForkParser failes to send core parser classes like ExternalParser

["Bob Paulin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TIKA-1507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14988840#comment-14988840 ] 

Bob Paulin commented on TIKA-1507:
----------------------------------

This is resolved by moving the tika-external-parsers.xml to the tika-core project which resolves the split package issue.  Fixed in rev 1712462.

> Under OSGi, ForkParser failes to send core parser classes like ExternalParser
> -----------------------------------------------------------------------------
>
>                 Key: TIKA-1507
>                 URL: https://issues.apache.org/jira/browse/TIKA-1507
>             Project: Tika
>          Issue Type: Bug
>          Components: packaging, parser
>    Affects Versions: 1.6, 1.7
>            Reporter: Nick Burch
>            Assignee: Bob Paulin
>         Attachments: TIKA-1507C.patch
>
>
> Under OSGi, if you try to use ForkParser with the Tesseract OCR parser, it will fail with:
> java.lang.NoClassDefFoundError: org/apache/tika/parser/external/ExternalParser
> 	at org.apache.tika.parser.ocr.TesseractOCRParser.hasTesseract(TesseractOCRParser.java:117)
> 	at org.apache.tika.parser.ocr.TesseractOCRParser.getSupportedTypes(TesseractOCRParser.java:91)
> 	at org.apache.tika.parser.CompositeParser.getParsers(CompositeParser.java:81)
> 	at org.apache.tika.parser.DefaultParser.getParsers(DefaultParser.java:95)
> 	at org.apache.tika.parser.CompositeParser.getParser(CompositeParser.java:209)
> 	at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:244)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:622)
> 	at org.apache.tika.fork.ForkServer.call(ForkServer.java:144)
> 	at org.apache.tika.fork.ForkServer.processRequests(ForkServer.java:124)
> 	at org.apache.tika.fork.ForkServer.main(ForkServer.java:69)
> Caused by: java.lang.ClassNotFoundException: Unable to find class org.apache.tika.parser.external.ExternalParser
> 	at org.apache.tika.fork.ClassLoaderProxy.findClass(ClassLoaderProxy.java:117)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:323)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:268)
> 	... 13 more
> ExternalParser lives in the Tika Core jar, not the Tika Parsers one. This all works fine outside of OSGi, so it looks like something about the OSGi bundling is causing the fork parser to fail to send the parser-related classes from Tika Core over to the forked JVM



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