java.lang.IllegalArgumentException: Argument can not be null

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java.lang.IllegalArgumentException: Argument can not be null
at com.springsource.repository.internal.StandardArtifactDescriptorDepository.resolveArtifactDescriptors(StandardArtifactDescriptorDepository.java:177)
at com.springsource.repository.internal.RepositoryDumpContributor.dumpDepository(RepositoryDumpContributor.java:76)
at com.springsource.repository.internal.RepositoryDumpContributor.contribute(RepositoryDumpContributor.java:60)
at com.springsource.osgi.medic.dump.impl.StandardDumpGenerator.generateDump(StandardDumpGenerator.java:70)
at com.springsource.osgi.medic.dump.impl.StandardDumpGenerator.generateDump(StandardDumpGenerator.java:57)
at com.springsource.kernel.serviceability.dump.DumpCoordinator.ajc$afterThrowing$com_springsource_kernel_serviceability_dump_DumpCoordinator$1$7340b330(DumpCoordinator.aj:56)
at com.springsource.kernel.concurrent.ExecutorServiceDelegate$KernelRunnable.run(ExecutorServiceDelegate.java:127)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)

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