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https://issues.apache.org/jira/browse/AXIOM-355?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Veithen resolved AXIOM-355.
-----------------------------------
Resolution: Invalid
The stack trace shows a class called SafeXMLStreamReader which only existed in
Axiom 1.2.8. Therefore the issue description doesn't match the information
about the affected version (which mentions 1.2.10). In addition, the OSGi stuff
has been completely reworked for the 1.2.9 release. The manifests are now
generated by maven-bundle-plugin which correctly includes javax.xml.stream.util
in the Import-Package declaration.
> 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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