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List:       webservices-general
Subject:    [jira] [Closed] (AXIOM-355) Axiom Causes java.lang.LinkageError
From:       "Andreas Veithen (JIRA)" <jira () apache ! org>
Date:       2011-03-27 11:49:05
Message-ID: 429654353.15020.1301226545836.JavaMail.tomcat () hel ! zones ! apache ! org
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     [ https://issues.apache.org/jira/browse/AXIOM-355?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

Andreas Veithen closed AXIOM-355.
---------------------------------


> Axiom Causes java.lang.LinkageError Running Under OSGi/Servicemix/Equinox
> -------------------------------------------------------------------------
> 
> Key: AXIOM-355
> URL: https://issues.apache.org/jira/browse/AXIOM-355
> Project: Axiom
> Issue Type: Bug
> Affects Versions: 1.2.10
> Environment: Apache Servicemix 4.3 (Fuse distribution), Apache ODE, Equinox
> Reporter: Kurt Westerfeld
> 
> When using Apache ODE under Apache Servicemix, Fuse distribution, which uses \
> Equinox as a OSGi container, the Apache ODE code throws a classloader exception \
> (see below....java.lang.LinkageError) when trying to use the javax.xml.stream.util \
> package.  The error seems to be related to a partial OSGi "Import-Package" \
> decleration provided by Apache Axiom.  To fix, I adjusted the OSGi manifest, and \
> added: javax.xml.stream.events,javax.xml.stream.util
> Around/alongside the javax.xml.stream import package statement.   This hack was not \
> something I would recommend normal users to have to do--it just illustrates the \
> OSGi packaging problem Axiom has. What I think is going on here is that Axiom loads \
> parts of its classes with the OSGi loader when running under Servicemix, which \
> provides the javax.xml.stream package from a supplied package (Stax API), and then \
> the boot loader provides other parts.  These two class domains cannot be \
> intermingled. Please simply add these two packages listed above to an explicitly \
> declared Import-Package to the maven compile for Axiom.  This will fix this nicely. \
> Simply add all three to the maven-bundle-plugin: javax.xml.stream,
> javax.xml.stream.events,
> javax.xml.stream.util
> A workaround for this issue can be found at the bottom of this web page, on project \
> Apache ODE: http://ode.apache.org/smx4-osgi-deployment.html.   Note the workaround \
> in this case causes the javax.xml.stream to always be loaded from one place, and \
> the OSGi manifest tweaks on Import-Package I suggest above do the same thing (but \
> don't require the user to change the configuration of the container). Here is the \
> stacktrace for the error I am receiving: Caused by: java.lang.LinkageError: loader \
> constraint violation: when resolving method \
> "javax.xml.stream.util.StreamReaderDelegate.<init>(Ljavax/xml/stream/XMLStreamReader;)V" \
> the class loader (instance of \
> org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the current class, \
> org/apache/axiom/om/impl/builder/SafeXMLStreamReader, and the class loader \
> (instance of <bootloader>) for resolved class, \
> javax/xml/stream/util/StreamReaderDelegate, have different Class objects for the \
> type javax/xml/stream/XMLStreamReader used in the signature  at \
> org.apache.axiom.om.impl.builder.SafeXMLStreamReader.<init>(SafeXMLStreamReader.java:62)
>   at org.apache.axiom.om.impl.builder.StAXBuilder.initParser(StAXBuilder.java:151)
> 	at org.apache.axiom.om.impl.builder.StAXBuilder.<init>(StAXBuilder.java:128)
> 	at org.apache.axiom.om.impl.builder.StAXBuilder.<init>(StAXBuilder.java:160)
> 	at org.apache.axiom.om.impl.builder.StAXOMBuilder.<init>(StAXOMBuilder.java:130)
> 	at org.apache.axiom.om.impl.builder.StAXOMBuilder.<init>(StAXOMBuilder.java:146)
> 	at org.apache.ode.il.DynamicService.convertToOM(DynamicService.java:159)
> 	at org.apache.ode.il.DynamicService.invoke(DynamicService.java:78)
> 	at org.apache.ode.jbi.DynamicMessageExchangeProcessor.invoke(DynamicMessageExchangeProcessor.java:61)
>   at org.apache.ode.jbi.BaseMessageExchangeProcessor.onJbiMessageExchange(BaseMessageExchangeProcessor.java:83)
>                 
> 	... 8 more

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