Occurred when adding a 2nd URL to Hawkular with C* running in separate containers:

Full stack trace: http://pastebin.test.redhat.com/345519

13:58:17,647 ERROR [com.thinkaurelius.titan.graphdb.database.StandardTitanGraph] (default task-12) Could not commit transaction [13] due to exception: com.thinkaurelius.titan.diskstorage.locking.PermanentLockingException: Local lock contention
at com.thinkaurelius.titan.diskstorage.locking.AbstractLocker.writeLock(AbstractLocker.java:323)
at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingStore.acquireLock(ExpectedValueCheckingStore.java:89)
at com.thinkaurelius.titan.diskstorage.keycolumnvalue.KCVSProxy.acquireLock(KCVSProxy.java:40)
at com.thinkaurelius.titan.diskstorage.BackendTransaction.acquireIndexLock(BackendTransaction.java:240)
at com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.prepareCommit(StandardTitanGraph.java:506)
at com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.commit(StandardTitanGraph.java:635)
at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.commit(StandardTitanTx.java:1337)
at com.thinkaurelius.titan.graphdb.blueprints.TitanBlueprintsGraph.commit(TitanBlueprintsGraph.java:60)
at org.hawkular.inventory.impl.tinkerpop.spi.GraphProvider.commit(GraphProvider.java:79)
at org.hawkular.inventory.impl.tinkerpop.InventoryContext.commit(InventoryContext.java:56)
at org.hawkular.inventory.impl.tinkerpop.TinkerpopBackend.commit(TinkerpopBackend.java:997)
at org.hawkular.inventory.base.Mutator.lambda$doCreate$26(Mutator.java:115)
at org.hawkular.inventory.base.spi.InventoryBackend$Transaction.execute(InventoryBackend.java:355)
at org.hawkular.inventory.base.Util.commitOrRetry(Util.java:96)
at org.hawkular.inventory.base.Util.runInTransaction(Util.java:78)
at org.hawkular.inventory.base.Traversal.mutating(Traversal.java:78)
at org.hawkular.inventory.base.Mutator.doCreate(Mutator.java:71)
at org.hawkular.inventory.base.BaseMetrics$ReadWrite.create(BaseMetrics.java:120)
at org.hawkular.inventory.base.BaseMetrics$ReadWrite.create(BaseMetrics.java:50)
at org.hawkular.inventory.rest.RestMetrics.createMetric(RestMetrics.java:126)
at org.hawkular.inventory.rest.RestMetrics.createMetric(RestMetrics.java:83)
at org.hawkular.inventory.rest.RestMetrics$Proxy$_$$_WeldClientProxy.createMetric(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)