If you are using 0.8.0 of Felix, then you seriously need to upgrade. You
can get the version of Felix by starting it and typing "version" in the
Felix shell or by typing "ps" and looking at the version of the system
bundle.
If you really are using 0.8.0, then it is possible that this was related
to a bug from a while ago where Felix was not properly guarding class
definition with a lock. Try upgrading to the latest 1.2.2 release (1.4.0
will be coming soon too).
-> richard
Ali Naddaf wrote:
Hi Richard.
In the manifest of felix.jar I see "Bundle-Version: 0.8.0.incubator",
so is that the version you are asking for? As for what I was doing,
this is a multimedia application and I was trying to open a media file
for playback. I am trying to see how I can deterministically reproduce
this but otherwise, do yo have any suggestion as to how I can debug
the issue?
Thanks,
Ali.
Richard S. Hall wrote:
Which version of Felix are you using?
What are you doing when this error occurs?
It certainly would be great to find some way to reproduce it. I am
sure it is explainable.
-> richard
Ali Naddaf wrote:
Hello all.
I have an OSGi based application (using Felix) that is under heavy
development and a few days ago, I started seeing the following
exception showing up in my logs:
java.lang.LinkageError: loader (instance of
org/apache/felix/framework/searchpolicy/ContentClassLoader):
attempted duplicate class definition for name:
"org/simplecenter/upnp/av/DIDLParser"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at
org.apache.felix.framework.searchpolicy.ContentClassLoader.findClass(ContentClassLoader.java:149)
at
org.apache.felix.framework.searchpolicy.ContentClassLoader.loadClassFromModule(ContentClassLoader.java:51)
at
org.apache.felix.framework.searchpolicy.ContentLoaderImpl.getClass(ContentLoaderImpl.java:121)
at
org.apache.felix.framework.searchpolicy.R4Wire.getClass(R4Wire.java:86)
at
org.apache.felix.framework.searchpolicy.R4SearchPolicyCore.searchImports(R4SearchPolicyCore.java:392)
at
org.apache.felix.framework.searchpolicy.R4SearchPolicyCore.findClassOrResource(R4SearchPolicyCore.java:353)
at
org.apache.felix.framework.searchpolicy.R4SearchPolicyCore.findClass(R4SearchPolicyCore.java:136)
at
org.apache.felix.framework.searchpolicy.R4SearchPolicy.findClass(R4SearchPolicy.java:45)
at
org.apache.felix.framework.searchpolicy.ContentClassLoader.loadClass(ContentClassLoader.java:70)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at
org.simplecenter.upnp.av.controlpoint.BaseAVTransportListener.parseMetaData(BaseAVTransportListener.java:87)
at
org.simplecenter.upnp.av.controlpoint.BaseAVTransportListener.change(BaseAVTransportListener.java:78)
at
org.simplecenter.upnp.av.controlpoint.LastChangeListener.parseStates(LastChangeListener.java:98)
at
org.simplecenter.upnp.av.controlpoint.LastChangeListener.parseEvent(LastChangeListener.java:74)
at
org.simplecenter.upnp.av.controlpoint.LastChangeListener.LastChangeChanged(LastChangeListener.java:45)
at
org.simplecenter.upnp.av.renderer.RendererAVTransport.LastChangeChanged(RendererAVTransport.java:48)
at
org.simplecenter.upnp.av.renderer.RendererDeviceInstance$1.sendEvent(RendererDeviceInstance.java:101)
at
org.simplecenter.upnp.av.renderer.LastChangeEventSender.flushEvents(LastChangeEventSender.java:122)
at
org.simplecenter.upnp.av.renderer.LastChangeEventSender.access$300(LastChangeEventSender.java:38)
at
org.simplecenter.upnp.av.renderer.LastChangeEventSender$EventTimer.run(LastChangeEventSender.java:101)
at java.lang.Thread.run(Unknown Source)
I cannot find any duplicate classes in my code and also this problem
doesn't show itself all the times, and yet I haven't been able to
find accurate reproduction steps. Anyhow, if any one has any
suggestion as to what this may mean and how I can debug that, it
would be greatly appreciated.
Many thanks
Ali
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