Found one Java-level deadlock:
=============================
"pool-org.apache.karaf.deployer.blueprint-2.3.0.fuse-71-047-thread-1":
  waiting to lock monitor 0x0000000010a374e8 (object 0x00000000e057e670, a java.util.ArrayList),
  which is held by "FelixStartLevel"
"FelixStartLevel":
  waiting to lock monitor 0x0000000010a37440 (object 0x00000000e057efc8, a java.lang.Object),
  which is held by "pool-org.apache.karaf.deployer.blueprint-2.3.0.fuse-71-047-thread-1"

Java stack information for the threads listed above:
===================================================
"pool-org.apache.karaf.deployer.blueprint-2.3.0.fuse-71-047-thread-1":
	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe.getBestServiceReference(AbstractServiceReferenceRecipe.java:443)
	- waiting to lock <0x00000000e057e670> (a java.util.ArrayList)
	at org.apache.aries.blueprint.container.ReferenceRecipe.retrack(ReferenceRecipe.java:128)
	at org.apache.aries.blueprint.container.ReferenceRecipe.untrack(ReferenceRecipe.java:151)
	- locked <0x00000000e057efc8> (a java.lang.Object)
	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe.serviceRemoved(AbstractServiceReferenceRecipe.java:359)
	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe.access$200(AbstractServiceReferenceRecipe.java:71)
	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe$3.run(AbstractServiceReferenceRecipe.java:317)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:722)
"FelixStartLevel":
	at org.apache.aries.blueprint.container.ReferenceRecipe.doStop(ReferenceRecipe.java:122)
	- waiting to lock <0x00000000e057efc8> (a java.lang.Object)
	at org.apache.aries.blueprint.container.AbstractServiceReferenceRecipe.stop(AbstractServiceReferenceRecipe.java:153)
	- locked <0x00000000e057e670> (a java.util.ArrayList)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.untrackServiceReference(BlueprintContainerImpl.java:597)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.untrackServiceReferences(BlueprintContainerImpl.java:577)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.destroy(BlueprintContainerImpl.java:845)
	at org.apache.aries.blueprint.container.BlueprintExtender.destroyContext(BlueprintExtender.java:254)
	at org.apache.aries.blueprint.container.BlueprintExtender.bundleChanged(BlueprintExtender.java:246)
	at org.apache.aries.blueprint.container.BlueprintExtender$BlueprintBundleTrackerCustomizer.modifiedBundle(BlueprintExtender.java:471)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:198)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.customizerModified(BundleHookBundleTracker.java:128)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$AbstractTracked.track(BundleHookBundleTracker.java:468)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$Tracked.bundleChanged(BundleHookBundleTracker.java:161)
	at org.apache.aries.util.tracker.hook.BundleHookBundleTracker$BundleEventHook.event(BundleHookBundleTracker.java:117)
	at org.apache.felix.framework.util.SecureAction.invokeBundleEventHook(SecureAction.java:1103)
	at org.apache.felix.framework.util.EventDispatcher.createWhitelistFromHooks(EventDispatcher.java:696)
	at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:484)
	at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4479)
	at org.apache.felix.framework.Felix.stopBundle(Felix.java:2592)
	at org.apache.felix.framework.Felix.setActiveStartLevel(Felix.java:1305)
	at org.apache.felix.framework.FrameworkStartLevelImpl.run(FrameworkStartLevelImpl.java:298)
	at java.lang.Thread.run(Thread.java:722)