CSIT failures - IndexOutOfBoundsException in fibmanager

It is coming in this line where usedRds is empty and we do usedRds.get(0) inside CleanUpDpnForVpn() in VrfEntryListener:

//Is this fib route an extra route? If yes, get the nexthop which would be
//an adjacency in the vpn
Optional<Routes> extraRouteOptional = VpnExtraRouteHelper.getVpnExtraroutes(dataBroker,
FibUtil.getVpnNameFromId(dataBroker, vpnInstance.getVpnId()), usedRds.get(0),
vrfEntry.getDestPrefix());

2017-03-21 16:24:00,754 | ERROR | nPool-1-worker-1 | DataStoreJobCoordinator | 326 - org.opendaylight.genius.mdsalutil-api - 0.2.0.SNAPSHOT | Exception when executing jobEntry: JobEntry

{key='FIB-100042-238054001007561', mainWorker=org.opendaylight.netvirt.fibmanager.VrfEntryListener$$Lambda$441/1666620594@32a9bdc2, rollbackWorker=null, retryCount=0, futures=null}

java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(ArrayList.java:653)[:1.8.0_121]
at java.util.ArrayList.get(ArrayList.java:429)[:1.8.0_121]
at org.opendaylight.netvirt.fibmanager.VrfEntryListener.lambda$cleanUpDpnForVpn$23(VrfEntryListener.java:2087)
at org.opendaylight.genius.datastoreutils.DataStoreJobCoordinator$MainTask.run(DataStoreJobCoordinator.java:268)[326:org.opendaylight.genius.mdsalutil-api:0.2.0.SNAPSHOT]
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)[:1.8.0_121]
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)[:1.8.0_121]
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)[:1.8.0_121]
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)[:1.8.0_121]
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)[:1.8.0_121]
2017-03-21 16:24:00,768 | INFO | nPool-1-worker-3 | LockManager | 350 - org.opendaylight.genius.lockmanager-impl - 0.2.0.SNAPSHOT | Unlocking acl.flow.priorities.pool.238054001007561.213TCP_DESTINATION_22_65535Egress36e2a25cc8-ceb2-4d89-b056-57497a31704b