NPE in aclservice while running IT

2016-09-02 01:34:45,219 | WARN | pool-47-thread-2 | AbstractAclServiceImpl | 350 - org.opendaylight.netvirt.aclservice-impl - 0.4.0.SNAPSHOT | security groups are null
java.lang.NullPointerException
at org.opendaylight.netvirt.aclservice.AbstractEgressAclServiceImpl.programAclRules(AbstractEgressAclServiceImpl.java:125)
at org.opendaylight.netvirt.aclservice.AbstractAclServiceImpl.programAclWithAllowedAddress(AbstractAclServiceImpl.java:172)
at org.opendaylight.netvirt.aclservice.AbstractAclServiceImpl.removeAcl(AbstractAclServiceImpl.java:185)
at org.opendaylight.netvirt.aclservice.AclServiceManagerImpl.notify(AclServiceManagerImpl.java:58)
at org.opendaylight.netvirt.aclservice.listeners.AclInterfaceStateListener.remove(AclInterfaceStateListener.java:83)
at org.opendaylight.netvirt.aclservice.listeners.AclInterfaceStateListener.remove(AclInterfaceStateListener.java:35)
at org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase$DataTreeChangeHandler.run(AsyncDataTreeChangeListenerBase.java:117)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)