java.util.ConcurrentModificationException

Missing intents in CHO test ( after installing 300 host intents)

During the pingall some intents return back to the installing state and the log has the following exception.

This does not seem to happen in 1.3.

2015-09-24 13:36:41,530 | ERROR | objectivetracker | Tools | 73 - org.onosproject.onlab-misc - 1.4.0.SNAPSHOT | Uncaught exception on onos-intent-objectivetracker
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)[:1.8.0_51]
at java.util.HashMap$KeyIterator.next(HashMap.java:1453)[:1.8.0_51]
at com.google.common.collect.AbstractMapBasedMultimap$WrappedCollection$WrappedIterator.next(AbstractMapBasedMultimap.java:486)[44:com.google.guava:18.0.0]
at org.onosproject.net.intent.impl.IntentManager.buildAndSubmitBatches(IntentManager.java:251)[143:org.onosproject.onos-core-net:1.4.0.SNAPSHOT]
at org.onosproject.net.intent.impl.IntentManager.access$600(IntentManager.java:77)[143:org.onosproject.onos-core-net:1.4.0.SNAPSHOT]
at org.onosproject.net.intent.impl.IntentManager$InternalTopoChangeDelegate.triggerCompile(IntentManager.java:285)[143:org.onosproject.onos-core-net:1.4.0.SNAPSHOT]
at org.onosproject.net.intent.impl.ObjectiveTracker$DeviceAvailabilityHandler.run(ObjectiveTracker.java:381)[143:org.onosproject.onos-core-net:1.4.0.SNAPSHOT]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_51]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_51]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_51]