stats for 80k fows not collected properly after mininet restart

odl: https://nexus.opendaylight.org/content/repositories/automatedweeklyreleases-1065/org/opendaylight/integration/distribution-karaf/0.3.0-Lithium-RC1-v201506170015/distribution-karaf-0.3.0-Lithium-RC1-v201506170015.tar.gz

features: odl-openflowplugin-flow-services-ui

steps to reproduce:
1) connect mininet with 63 switches
sudo mn --controller=remote,ip=10.25.2.9 --topo tree,6 --switch ovsk,protocols=OpenFlow13

2) configure 80k flows using
test/tools/odl-mdsal-clustering-tests/clustering-performance-test/flow_stats_stability_monitor.py --host 10.25.2.9 --auth --fpr 20 --config_monitor 750 --deconfig_monitor 200 --monitor_period 30 --flows 16000 --threads 5 --bulk-delete

3) once flows are configured you can restart mininet

the script output looks like

• • • Test summary:
      Elapsed time: 87.66s
      Peak requests/s: 46.98 OK, 46.98 Total
      Peak flows/s: 939.62 OK, 939.62 Total
      Avg. requests/s: 45.63 OK, 45.63 Total (97.13% of peak total)
      Avg. flows/s: 912.67 OK, 912.67 Total (97.13% of peak total)

• • • Total flows added: 80000
      HTTP[OK] results: 4000

(1434538519.780677, 63, 29767, 26360)
(1434538547.42563, 63, 39727, 35980)
(1434538579.425267, 63, 52067, 48660)
(1434538611.199114, 63, 63947, 60860)
(1434538647.436588, 63, 74727, 72600)
(1434538679.702498, 63, 80567, 80000)
(1434538709.464098, 63, 80567, 80000)
Could not retrieve inventory, response not in JSON format HERE MINIENT WAS RESTARTED
(1434538721.380539, 0, 0, 0)
Could not retrieve inventory, response not in JSON format
(1434538751.394594, 0, 0, 0)
Could not retrieve inventory, response not in JSON format
(1434538781.423616, 0, 0, 0)
Could not retrieve inventory, response not in JSON format
(1434538811.434752, 0, 0, 0)
(1434538841.66587, 30, 1289, 1280)
(1434538873.432987, 54, 11801, 13020)
(1434538904.859306, 63, 18286, 22440)
(1434538936.936223, 63, 35583, 33900)
(1434538968.239737, 63, 43110, 42813)
(1434539000.265855, 63, 53202, 54133)
(1434539031.529655, 63, 62934, 62493)
(1434539063.868791, 63, 74335, 73813)
(1434539102.517058, 63, 80560, 79993) only 79993 out of 80k present in the inventory
(1434539129.367053, 63, 80560, 79993)
(1434539159.691142, 63, 80560, 79993)
(1434539189.831279, 63, 80560, 79993)
(1434539219.873444, 63, 80560, 79993)
(1434539249.604617, 63, 80560, 79993)
(1434539279.611363, 63, 80560, 79993)

Deleting all flows in bulk:
All flows deleted.
(1434539299.211172, 63, 80560, 79993)
(1434539314.711525, 63, 567, 0)
(1434539344.687325, 63, 567, 0)
(1434539374.741245, 63, 567, 0)
(1434539404.618388, 63, 567, 0)
(1434539434.671081, 63, 567, 0)
(1434539464.632976, 63, 567, 0)
(1434539494.923816, 63, 567, 0)

And the log is full of warnings like this:

2015-06-17 10:58:22,292 | WARN | nPool-7-worker-3 | StatRpcMsgManagerImpl | 195 - org.opendaylight.openflowplugin.applications.statistics-manager - 0.1.0.Lithium-RC1-v201506170015 | Response Registration for Statistics RPC call fail!
org.opendaylight.controller.md.sal.dom.api.DOMRpcImplementationNotAvailableException: No local or remote implementation available for rpc AbsoluteSchemaPath

{path=[(urn:opendaylight:flow:statistics?revision=2013-08-19)get-aggregate-flow-statistics-from-flow-table-for-all-flows]}

at org.opendaylight.controller.remote.rpc.RemoteRpcImplementation$1.onComplete(RemoteRpcImplementation.java:57)[178:org.opendaylight.controller.sal-remoterpc-connector:1.2.0.Lithium-RC1-v201506170015]
at org.opendaylight.controller.remote.rpc.RemoteRpcImplementation$1.onComplete(RemoteRpcImplementation.java:48)[178:org.opendaylight.controller.sal-remoterpc-connector:1.2.0.Lithium-RC1-v201506170015]
at akka.dispatch.OnComplete.internal(Future.scala:248)[164:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.OnComplete.internal(Future.scala:245)[164:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:175)[164:com.typesafe.akka.actor:2.3.10]
at akka.dispatch.japi$CallbackBridge.apply(Future.scala:172)[164:com.typesafe.akka.actor:2.3.10]
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32)[161:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.impl.ExecutionContextImpl$$anon$3.exec(ExecutionContextImpl.scala:107)[161:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)[161:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)[161:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)[161:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)[161:org.scala-lang.scala-library:2.10.4.v20140209-180020-VFINAL-b66a39653b]