Bulkomatic tool failing often in Nitrogen branch

This is the job (single node):

https://jenkins.opendaylight.org/releng/view/openflowplugin/job/openflowplugin-csit-1node-perf-bulkomatic-only-nitrogen/

And this is the ERROR seen in karaf log:

2018-02-14 08:15:25,876 | ERROR | lt-dispatcher-21 | LocalThreePhaseCommitCohort | 223 - org.opendaylight.controller.sal-distributed-datastore - 1.6.2.SNAPSHOT | Failed to prepare transaction member-1-datastore-config-fe-0-chn-60-txn-0-0 on backend akka.pattern.AskTimeoutException: Ask timed out on ActorSelection[Anchor(akka://opendaylight-cluster-data/), Path(/user/shardmanager-config/member-1-shard-inventory-config#-447778172)] after [30000 ms]. Sender[null] sent message of type "org.opendaylight.controller.cluster.datastore.messages.ReadyLocalTransaction". at akka.pattern.PromiseActorRef$$anonfun$1.apply$mcV$sp(AskSupport.scala:604)[35:com.typesafe.akka.actor:2.4.18] at akka.actor.Scheduler$$anon$4.run(Scheduler.scala:126)[35:com.typesafe.akka.actor:2.4.18] at scala.concurrent.Future$InternalCallbackExecutor$.unbatchedExecute(Future.scala:601)[334:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc] at scala.concurrent.BatchingExecutor$class.execute(BatchingExecutor.scala:109)[334:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc] at scala.concurrent.Future$InternalCallbackExecutor$.execute(Future.scala:599)[334:org.scala-lang.scala-library:2.11.11.v20170413-090219-8a413ba7cc] at akka.actor.LightArrayRevolverScheduler$TaskHolder.executeTask(LightArrayRevolverScheduler.scala:329)[35:com.typesafe.akka.actor:2.4.18] at akka.actor.LightArrayRevolverScheduler$$anon$4.executeBucket$1(LightArrayRevolverScheduler.scala:280)[35:com.typesafe.akka.actor:2.4.18] at akka.actor.LightArrayRevolverScheduler$$anon$4.nextTick(LightArrayRevolverScheduler.scala:284)[35:com.typesafe.akka.actor:2.4.18] at akka.actor.LightArrayRevolverScheduler$$anon$4.run(LightArrayRevolverScheduler.scala:236)[35:com.typesafe.akka.actor:2.4.18] at java.lang.Thread.run(Thread.java:748)[:1.8.0_161]