ConcurrentModificationException on schema, investigate!!!!!

[pietermartin]

2015-03-11 12:43:15,606 ERROR [VirtualGroupLoadGuru.recalculateVirtualGroupAsync-27733-thread-1] VirtualGroupLoadGuru:552 - Failed internalWalkDownAndAddOrRemoveVirtualGroups. java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429) at java.util.HashMap$EntryIterator.next(HashMap.java:1463) at java.util.HashMap$EntryIterator.next(HashMap.java:1461) at java.util.HashMap.putMapEntries(HashMap.java:511) at java.util.HashMap.putAll(HashMap.java:784) at org.umlg.sqlg.structure.SchemaManager.getEdgeForeignKeys(SchemaManager.java:1016) at org.umlg.sqlg.structure.SqlgVertex.internalGetVertices(SqlgVertex.java:504) at org.umlg.sqlg.structure.SqlgVertex.vertices(SqlgVertex.java:344) at org.umlg.sqlg.strategy.SqlgVertexStep.flatMap(SqlgVertexStep.java:45) at org.apache.tinkerpop.gremlin.process.graph.traversal.step.map.FlatMapStep.processNextStart(FlatMapStep.java:48) at org.apache.tinkerpop.gremlin.process.traversal.step.AbstractStep.hasNext(AbstractStep.java:134) at org.apache.tinkerpop.gremlin.process.traversal.DefaultTraversal.hasNext(DefaultTraversal.java:115) at org.umlg.runtime.collection.persistent.BaseCollection.loadManyNotPrimitiveNotDataType(BaseCollection.java:1449) at org.umlg.runtime.collection.persistent.BaseCollection.loadFromVertex(BaseCollection.java:75) at org.umlg.runtime.collection.persistent.BaseCollection.maybeLoad(BaseCollection.java:811) at org.umlg.runtime.collection.persistent.BaseCollection.add(BaseCollection.java:169) at org.umlg.runtime.collection.persistent.BaseCollection.addIgnoreInverse(BaseCollection.java:162) at com.rorotika.cm.network.AbstractWorkspaceElement.addToVirtualGroupIgnoreInverse(AbstractWorkspaceElement.java:347) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru.lambda$internalWalkDownAndAddOrRemoveVirtualGroups$13(VirtualGroupLoadGuru.java:513) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru$$Lambda$118/1746798919.visit(Unknown Source) at com.rorotika.cm.etl.meta.EtlElement.walkNetworkElementsForRealAndPlan(EtlElement.java:482) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru.internalWalkDownAndAddOrRemoveVirtualGroups(VirtualGroupLoadGuru.java:505) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru.walkDownAndAddVirtualGroup(VirtualGroupLoadGuru.java:438) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru.recalculateVirtualGroup(VirtualGroupLoadGuru.java:195) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru.lambda$recalculateVirtualGroupAsync$3(VirtualGroupLoadGuru.java:73) at com.rorotika.cm.network.virtualgroup.VirtualGroupLoadGuru$$Lambda$137/726698298.call(Unknown Source) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) 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)

[pietermartin]

Can not duplicate.