14:52:47,299 ERROR [com.thinkaurelius.titan.graphdb.database.StandardTitanGraph] (default task-4) Could not commit transaction [11] due to exception: com.thinkaurelius.titan.core.TitanException: Could not execute operation due to backend exception
	at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:44)
	at com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.CacheTransaction.persist(CacheTransaction.java:86)
	at com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.CacheTransaction.flushInternal(CacheTransaction.java:140)
	at com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.CacheTransaction.commit(CacheTransaction.java:197)
	at com.thinkaurelius.titan.diskstorage.BackendTransaction.commit(BackendTransaction.java:134)
	at com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.commit(StandardTitanGraph.java:644)
	at com.thinkaurelius.titan.graphdb.transaction.StandardTitanTx.commit(StandardTitanTx.java:1337)
	at org.hawkular.inventory.impl.tinkerpop.spi.GraphProvider.commit(GraphProvider.java:127)
	at org.hawkular.inventory.impl.tinkerpop.InventoryContext.commit(InventoryContext.java:59)
	at org.hawkular.inventory.impl.tinkerpop.TinkerpopBackend.commit(TinkerpopBackend.java:1065)
	at org.hawkular.inventory.base.Transaction$Committable.commit(Transaction.java:291)
	at org.hawkular.inventory.base.TransactionPayload$Committing.lambda$committing$44(TransactionPayload.java:35)
	at org.hawkular.inventory.base.Traversal.lambda$inCommittableTx$93(Traversal.java:106)
	at org.hawkular.inventory.base.Util.onFailureRetry(Util.java:107)
	at org.hawkular.inventory.base.Util.inCommittableTx(Util.java:79)
	at org.hawkular.inventory.base.Traversal.inCommittableTx(Traversal.java:105)
	at org.hawkular.inventory.base.Traversal.inTx(Traversal.java:96)
	at org.hawkular.inventory.base.Traversal.inTx(Traversal.java:79)
	at org.hawkular.inventory.base.SingleSyncedFetcher.synchronize(SingleSyncedFetcher.java:93)
	at org.hawkular.inventory.base.BaseResources$Single.synchronize(BaseResources.java:205)
	at org.hawkular.inventory.rest.RestSync.sync(RestSync.java:77)
	at org.hawkular.inventory.rest.RestSync$Proxy$_$$_WeldClientProxy.sync(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:498)
	at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:139)
	at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
	at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
	at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:236)
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:395)
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:202)
	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:221)
	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
	at io.undertow.websockets.jsr.JsrWebSocketFilter.doFilter(JsrWebSocketFilter.java:129)
	at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
	at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
	at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
	at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
	at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
	at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
	at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
	at io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51)
	at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
	at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
	at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56)
	at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
	at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
	at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
	at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
	at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
	at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
	at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
	at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
	at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.thinkaurelius.titan.diskstorage.locking.PermanentLockingException: Expected value mismatch for KeyColumn [k=0x 16-165-160-114-116- 37-100-101-102-105-110-101-243, c=0x  0]: expected=[] vs actual=[  5- 16-149] (store=graphindex)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.checkSingleExpectedValueUnsafe(ExpectedValueCheckingTransaction.java:274)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.access$000(ExpectedValueCheckingTransaction.java:35)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction$1.call(ExpectedValueCheckingTransaction.java:212)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction$1.call(ExpectedValueCheckingTransaction.java:209)
	at com.thinkaurelius.titan.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:56)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.checkSingleExpectedValue(ExpectedValueCheckingTransaction.java:209)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.checkAllExpectedValues(ExpectedValueCheckingTransaction.java:178)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction.prepareForMutations(ExpectedValueCheckingTransaction.java:143)
	at com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingStoreManager.mutateMany(ExpectedValueCheckingStoreManager.java:57)
	at com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.CacheTransaction$1.call(CacheTransaction.java:89)
	at com.thinkaurelius.titan.diskstorage.keycolumnvalue.cache.CacheTransaction$1.call(CacheTransaction.java:86)
	at com.thinkaurelius.titan.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:56)
	at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:42)
	... 70 more