NoClassDefFoundError using Xerces in OSGi environment - osgi

Question

I've built a simple bundle which instantiate a org.apache.xerces.util.XMLCatalogResolver class.
In my pom, I've had these dependencies and plugin :
<build>
<plugins>
<!-- Plugin to create bundle -->
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>2.5.4</version>
<extensions>true</extensions>
<configuration>
<instructions>
<Import-Package>*</Import-Package>
<Export-Package>myXMLResolver</Export-Package>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>2.16.1</version>
<type>bundle</type>
<scope>provided</scope>
</dependency>
<!-- xerces is provided in /lib/endorsed/ folder of ServiceMix -->
<dependency>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
<version>2.11.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.servicemix.bundles</groupId>
<artifactId>org.apache.servicemix.bundles.xmlresolver</artifactId>
<version>1.2_5</version>
<type>bundle</type>
<scope>compile</scope>
</dependency>
</dependencies>
</build>
Testing the bundle "locally" (within the IDE) is working fine.
Deploying it into the /deploy folder is also fine (its status is "Active").
When running it (through Camel route), I get this stacktrace :
Caused by: java.lang.NoClassDefFoundError: org/apache/xml/resolver/CatalogManager
at org.apache.xerces.util.XMLCatalogResolver.init(Unknown Source)[:]
at org.apache.xerces.util.XMLCatalogResolver.<init>(Unknown Source)[:]
at org.apache.xerces.util.XMLCatalogResolver.<init>(Unknown Source)[:]
at myXMLResolver.MainBean.run(MainBean.java:17)[241:test.myXMLResolver:0.0.1.SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.7.0_95]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[:1.7.0_95]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.7.0_95]
at java.lang.reflect.Method.invoke(Method.java:606)[:1.7.0_95]
at org.apache.camel.component.bean.MethodInfo.invoke(MethodInfo.java:408)[199:org.apache.camel.camel-core:2.16.1]
at org.apache.camel.component.bean.MethodInfo$1.doProceed(MethodInfo.java:279)[199:org.apache.camel.camel-core:2.16.1]
at org.apache.camel.component.bean.MethodInfo$1.proceed(MethodInfo.java:252)[199:org.apache.camel.camel-core:2.16.1]
... 19 more
If I'm not wrong, the class CatalogManager from package org.apache.xml.resolver existed during compilation but not in run-time. So I deploy org.apache.servicemix.bundles.xmlresolver dependency into /deploy folder.
When executing in Karaf console the command bundle:headers <xmlresolver_bundle_id>, I get :
Export-Package =
...
org.apache.xml.resolver;uses:="org.apache.xml.resolver.helpers,javax.xml.parsers,org.apache.xml.resolver.readers";version=1.2,
...
Nevertheless, same stacktrace appears.
Even if I add the package org.apache.xml.resolver in the <Import-Package> I get the same error.
Any idea of what's going on ?
I'm using ServiceMix 6.1.0 (w/ Karaf 3.0.5), running on Java 7.
Edit :
Here is the bundle's MANIFEST.MF :
Manifest-Version: 1.0
Bnd-LastModified: 1461311084908
Build-Jdk: 1.8.0_72-internal
Bundle-ManifestVersion: 2
Bundle-Name: myXMLResolver
Bundle-SymbolicName: test.myXMLResolver
Bundle-Version: 0.0.1.SNAPSHOT
Created-By: Apache Maven Bundle Plugin
Export-Package: myXMLResolver;version="0.0.1";uses:="org.apache.camel,org.apache.xerces.util"
Import-Package: org.apache.camel;version="[2.16,3)",org.apache.xerces.util;version="[2.11,3)"
Require-Capability: osgi.ee;filter:="(&(osgi.ee=JavaSE)(version=1.7))"
Tool: Bnd-2.4.1.201501161923
If I add the package org.apache.xml.resolver in the <Import-Package>, Import-Package from MANIFEST become : org.apache.camel;version="[2.16,3)",org.apache.xerces.util;version="[2.11,3)",org.apache.xml.resolver;version="[1.2,2)"
Edit #2 : workaround
A workaround can be done :
Put the bundle org.apache.servicemix.bundles.xmlresolver in
<SMX_HOME>/lib/endorsed folder
In the file <SMX_HOME>/etc/config.properties, add
org.apache.xml.resolver to the property
org.osgi.framework.system.package.extra.
But it doesn't look like a clean method...
Edit #3 : issue opened on Jira : https://issues.apache.org/jira/browse/SM-3020