StackOverflowError while shard is committing

Scale testing on latest Boron code with 3-node cluster as part of an openstack solution.
200 OVSs are connected, and 1 VM per OVS.
ODL3 crashed because of a StackOverflowError:
2017-03-22T21:00:38.704+0200: [GC pause (G1 Evacuation Pause) (young) 21G->8029M(24G), 0.0591195 secs]
Uncaught error from thread [opendaylight-cluster-data-akka.actor.default-dispatcher-49] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[opendaylight-cluster-data]
java.lang.StackOverflowError
at org.opendaylight.yangtools.yang.data.impl.schema.nodes.AbstractImmutableDataContainerNode.getValue(AbstractImmutableDataContainerNode.java:38)
at org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableMapEntryNodeBuilder.<init>(ImmutableMapEntryNodeBuilder.java:45)
at org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableMapEntryNodeBuilder.create(ImmutableMapEntryNodeBuilder.java:61)
at org.opendaylight.yangtools.yang.data.impl.schema.tree.ListEntryModificationStrategy.createBuilder(ListEntryModificationStrategy.java:64)
at org.opendaylight.yangtools.yang.data.impl.schema.tree.ListEntryModificationStrategy.createBuilder(ListEntryModificationStrategy.java:22)
....

This can be seen in karaf.out