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java.lang.NullPointerException: 	at com.ligadata.metadataapiservice.RemoveEngineConfigService.process(RemoveEngineConfigService.scala:61)	at com.ligadata.metadataapiservice.RemoveEngineConfigService$$anonfun$receive$1.applyOrElse(RemoveEngineConfigService.scala:50)	at akka.actor.Actor$class.aroundReceive(Actor.scala:465)	at com.ligadata.metadataapiservice.RemoveEngineConfigService.aroundReceive(RemoveEngineConfigService.scala:36)	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)	at akka.actor.ActorCell.invoke(ActorCell.scala:487)	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)	at akka.dispatch.Mailbox.run(Mailbox.scala:221)	at akka.dispatch.Mailbox.exec(Mailbox.scala:231)	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)