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java.lang.IllegalStateException: Promise already completed.	at scala.concurrent.Promise$class.complete(Promise.scala:55)	at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153)	at scala.concurrent.Promise$class.success(Promise.scala:86)	at scala.concurrent.impl.Promise$DefaultPromise.success(Promise.scala:153)	at com.omsignal.sync.open.rest.omplus.E4sOmplusElasticSearchIndexClient$$anonfun$1.apply$mcV$sp(OmplusElasticSearchIndexClient.scala:93)	at com.sksamuel.elastic4s.streams.BulkActor.postStop(BulkIndexingSubscriber.scala:176)	at akka.actor.Actor$class.aroundPostStop(Actor.scala:492)	at com.sksamuel.elastic4s.streams.BulkActor.aroundPostStop(BulkIndexingSubscriber.scala:86)	at akka.actor.dungeon.FaultHandling$class.akka$actor$dungeon$FaultHandling$$finishTerminate(FaultHandling.scala:210)	at akka.actor.dungeon.FaultHandling$class.terminate(FaultHandling.scala:172)	at akka.actor.ActorCell.terminate(ActorCell.scala:374)	at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:467)	at akka.actor.ActorCell.systemInvoke(ActorCell.scala:483)	at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:260)	at akka.dispatch.Mailbox.run(Mailbox.scala:224)	at akka.dispatch.Mailbox.exec(Mailbox.scala:234)	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)