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https://issues.apache.org/jira/browse/CXF-3949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622164#comment-13622164
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Sergey Beryozkin commented on CXF-3949:
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FYI, I had to move the static initializer from CXFNonSpringJaxrsServlet to its
new subclass, CXFJaxrsRuntimeDelegateServlet, in order to fix the regression
reported at https://issues.apache.org/jira/browse/CXF-4825.
Also, check https://issues.apache.org/jira/browse/CXF-4825: the idea is to have
the runtime not depending on RuntimeDelegate completely and make sure the
'foreign' instances like Response are copied, for example, when the application
code uses an active RuntimeDelegate. I'm actually hoping that this new
CXFJaxrsRuntimeDelegateServlet will prove to be redundant, if not now then soon
enough
> NoClassDefFoundError when using CXF JAX-RS in OSGi environment
> --------------------------------------------------------------
>
> Key: CXF-3949
> URL: https://issues.apache.org/jira/browse/CXF-3949
> Project: CXF
> Issue Type: Bug
> Components: JAX-RS
> Affects Versions: 2.3.2
> Environment: ServiceMix 4.3
> Reporter: metatech
> Assignee: Sergey Beryozkin
> Fix For: 2.4.9, 2.5.5, 2.6.2, 2.7.0
>
> Original Estimate: 8h
> Remaining Estimate: 8h
>
> When using the CXF JAX-RS implementation in an OSGi environment, the CXF
> implementation might fail to initialize properly.
> The problem is non-consistently reproduceable, but more likely to occur on
> machines with high parallelism (due to several cores/threads).
> The CXF bundle ("org.apache.cxf.bundle") has a dependency on the JSR 311 API
> JAR ("org.apache.servicemix.specs.jsr311-api-1.1").
> But the dependency is marked as "resolution=optional" in the OSGi headers of
> the CXF bundle manifest.
> As a result, if the JSR-311 bundle is not yet fully started when the CXF
> bundle is started, OSGi does not "wire" these packages into the imports of
> the CXF bundle:
> javax.ws.rs
> javax.ws.rs.core
> javax.ws.rs.ext
> The error is the following :
> java.lang.NoClassDefFoundError: Could not initialize class
> org.apache.cxf.jaxrs.utils.JAXRSUtils
> See similar error DOSGI-1
> I guess that these packages are marked as optional because CXF can be used in
> an environment where no JAX-RS is available, and it works fine as long as the
> application does not use this API. However, when an application is known to
> use the API, the dependency marked as "optional" is not correct.
> Long-term solution : split CXF bundle into smaller bundles (like Jetty).
> Workaround : edit the manifest of the CXF bundle, and remove the
> "resolution=optional" for the packages which are known to be used by the
> application. Tip : replace "resolution" by "resolutio2", this tricks
> prevents from changing the alignment of the 80-characters columns.
>
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