Multiple entries with same key exceptions are seen

https://jenkins.opendaylight.org/releng/view/netvirt-csit/job/netvirt-csit-1node-0cmb-1ctl-2cmp-openstack-queens-upstream-stateful-aluminium/

https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/netvirt-csit-1node-0cmb-1ctl-2cmp-openstack-queens-upstream-stateful-aluminium/91/robot-plugin/log_full.html.gz#s1-s1

Karaf logs:

https://logs.opendaylight.org/releng/vex-yul-odl-jenkins-1/netvirt-csit-1node-0cmb-1ctl-2cmp-openstack-queens-upstream-stateful-aluminium/91/odl_1/odl1_karaf.log.gz

Job still failed on final retry: JobEntry{key='bc.group.update.376b8a1f-a6a4-4872-8dc1-5303b57267ed', jobId='J377', queueId='Q274', mainWorker=org.opendaylight.netvirt.elan.l2gw.jobs.BcGroupUpdateJob@62da31a7, rollbackWorker=null, retryCount=5/5, futures=[com.google.common.util.concurrent.ImmediateFuture$ImmediateFailedFuture@91b9f64[status=FAILURE, cause=[java.lang.IllegalArgumentException: Multiple entries with same key: BucketKey{_bucketId=BucketId{_value=1}}=Bucket{_action={ActionKey{_order=0}=Action{_action=NxActionRegLoadNodesNodeTableFlowApplyActionsCase{_nxRegLoad=NxRegLoad{_dst=Dst{_dstChoice=DstNxRegCase{_nxReg=interface org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6, augmentation=[]}, _end=31, _start=0, augmentation=[]}, _value=3328, augmentation=[]}, augmentation=[]}, _order=0, augmentation=[]}, ActionKey{_order=1}=Action{_action=NxActionResubmitRpcAddGroupCase{_nxResubmit=NxResubmit{_table=220, augmentation=[]}, augmentation=[]}, _order=1, augmentation=[]}}, _bucketId=BucketId{_value=1}, _watchGroup=4294967295, _watchPort=4294967295, _weight=0, augmentation=[]} and BucketKey{_bucketId=BucketId{_value=1}}=Bucket{_action={ActionKey{_order=0}=Action{getAction=NxActionRegLoadNodesNodeGroupBucketsBucketActionsCase{getNxRegLoad=NxRegLoad Unknown macro: {getDst=Dst{getDstChoice=DstNxRegCase{getNxReg=interface org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6, augmentation=[]}, getEnd=31, getStart=0, augmentation=[]}, getValue=3328, augmentation=[]}, augmentation=[]}, getOrder=0, augmentation=[]}, ActionKey{_order=1}=Action{getAction=NxActionResubmitNodesNodeGroupBucketsBucketActionsCase{getNxResubmit=NxResubmit{getInPort=65528, getTable=220, augmentation=[]}, augmentation=[]}, getOrder=1, augmentation=[]}}, _bucketId=BucketId{_value=1}, _watchGroup=4294967295, _watchPort=4294967295, _weight=0, augmentation=[]}. To index multiple values under a key, use Multimaps.index.]]]} java.lang.IllegalArgumentException: Multiple entries with same key: BucketKey{_bucketId=BucketId{_value=1}}=Bucket{_action={ActionKey{_order=0}=Action{_action=NxActionRegLoadNodesNodeTableFlowApplyActionsCase{_nxRegLoad=NxRegLoad{_dst=Dst{_dstChoice=DstNxRegCase{_nxReg=interface org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6, augmentation=[]}, _end=31, _start=0, augmentation=[]}, _value=3328, augmentation=[]}, augmentation=[]}, _order=0, augmentation=[]}, ActionKey{_order=1}=Action{_action=NxActionResubmitRpcAddGroupCase{_nxResubmit=NxResubmit{_table=220, augmentation=[]}, augmentation=[]}, _order=1, augmentation=[]}}, _bucketId=BucketId{_value=1}, _watchGroup=4294967295, _watchPort=4294967295, _weight=0, augmentation=[]} and BucketKey{_bucketId=BucketId{_value=1}}=Bucket{_action={ActionKey{_order=0}=Action{getAction=NxActionRegLoadNodesNodeGroupBucketsBucketActionsCase{getNxRegLoad=NxRegLoad{getDst=Dst{getDstChoice=DstNxRegCase{getNxReg=interface org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg6, augmentation=[]}, getEnd=31, getStart=0, augmentation=[]}, getValue=3328, augmentation=[]} , augmentation=[]}, getOrder=0, augmentation=[]}, ActionKey{_order=1}=Action{getAction=NxActionResubmitNodesNodeGroupBucketsBucketActionsCase {getNxResubmit=NxResubmit{getInPort=65528, getTable=220, augmentation=[]}, augmentation=[]} , getOrder=1, augmentation=[]}}, _bucketId=BucketId{_value=1}, _watchGroup=4294967295, _watchPort=4294967295, _weight=0, augmentation=[]}. To index multiple values under a key, use Multimaps.index.

        at com.google.common.collect.Maps.uniqueIndex(Maps.java:1338) ~[bundleFile:?]

        at com.google.common.collect.Maps.uniqueIndex(Maps.java:1293) ~[bundleFile:?]

        at org.opendaylight.yangtools.yang.binding.CodeHelpers.compatMap(CodeHelpers.java:296) ~[?:?]

        at org.opendaylight.yang.gen.v1.urn.opendaylight.group.types.rev131018.group.BucketsBuilder.setBucket(BucketsBuilder.java:113) ~[?:?]

        at org.opendaylight.genius.mdsalutil.MDSALUtil.buildBucketLists(MDSALUtil.java:293) ~[?:?]

        at org.opendaylight.netvirt.elan.utils.ElanUtils.syncUpdateGroup(ElanUtils.java:1768) ~[?:?]

        at org.opendaylight.netvirt.elan.l2gw.utils.ElanL2GatewayMulticastUtils.setupStandardElanBroadcastGroups(ElanL2GatewayMulticastUtils.java:303) ~[?:?]

        at org.opendaylight.netvirt.elan.l2gw.utils.ElanL2GatewayMulticastUtils.updateRemoteBroadcastGroupForAllElanDpns(ElanL2GatewayMulticastUtils.java:265) ~[?:?]

        at org.opendaylight.netvirt.elan.l2gw.jobs.BcGroupUpdateJob.lambda$call$0(BcGroupUpdateJob.java:59) ~[?:?]

        at org.opendaylight.genius.infra.ManagedTransactionFactoryImpl.lambda$callWithNewTransactionAndSubmit$3(ManagedTransactionFactoryImpl.java:89) ~[?:?]

        at org.opendaylight.genius.infra.ManagedTransactionFactoryImpl.applyWithNewTransactionAndSubmit(ManagedTransactionFactoryImpl.java:105) ~[?:?]

        at org.opendaylight.genius.infra.ManagedTransactionFactoryImpl.callWithNewTransactionAndSubmit(ManagedTransactionFactoryImpl.java:88) ~[?:?]

        at org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl.callWithNewWriteOnlyTransactionAndSubmit(ManagedNewTransactionRunnerImpl.java:63) ~[?:?]

        at org.opendaylight.netvirt.elan.l2gw.jobs.BcGroupUpdateJob.call(BcGroupUpdateJob.java:58) ~[?:?]

        at org.opendaylight.netvirt.elan.l2gw.jobs.BcGroupUpdateJob.call(BcGroupUpdateJob.java:27) ~[?:?]

        at org.opendaylight.infrautils.jobcoordinator.internal.JobCoordinatorImpl$MainTask.run(JobCoordinatorImpl.java:416) [bundleFile:?]

        at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426) [?:?]

        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) [?:?]

        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) [?:?]

        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) [?:?]

        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) [?:?]

        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) [?:?]