Operational Inventory data persists in datastore after network is disconnected

I'm using this build: https://nexus.opendaylight.org/content/repositories/opendaylight.snapshot/org/opendaylight/integration/distribution-karaf/0.4.3-SNAPSHOT/distribution-karaf-0.4.3-20160530.142832-194.zip

And I'm running ODL in 3-node cluster.

After connecting mininet to cluster (sudo mn --controller 'remote,ip=10.25.2.14,port=6633' --controller 'remote,ip=10.25.2.13,port=6633' --controller 'remote,ip=10.25.2.12,port=6633' --topo tree,3 --switch ovsk,protocols=OpenFlow13) operational inventory DS shows data correctly. But after quitting (and cleaning up) mininet, data are still present in operational inventory datastore.