Exception on $delete event if id does not exist

[rschuil]

When sending a $delete event with an entity ID that does not exist, Harness returns status 500 and logs an exception:

09:28:02.279 INFO ActorSystemImpl - Harness Server: HttpRequest(HttpMethod(POST),http://host:9090/engines/ur/events,List(Host: host:9090, User-Agent: agent, Timeout-Access: ),HttpEntity.Strict(application/json,{"event":"$delete","entityType":"item","entityId":"766559","eventTime":"2020-10-21T10:28:02+03:00"}),HttpProtocol(HTTP/1.1))
09:28:02.281 ERROR MongoAsyncDao - Can't removeOne from collection ur.items with filter WrappedArray((_id,Equals(766559)))
09:28:02.282 ERROR ActorSystemImpl - Internal error
java.lang.RuntimeException: Can't removeOne from collection ur.items with filter WrappedArray((_id,Equals(766559)))
at com.actionml.core.store.backends.MongoAsyncDao$$anonfun$removeOneAsync$2.apply(MongoAsyncDao.scala:133)
at com.actionml.core.store.backends.MongoAsyncDao$$anonfun$removeOneAsync$2.apply(MongoAsyncDao.scala:127)
at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:253)
at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:251)
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:36)
at scala.concurrent.impl.ExecutionContextImpl$AdaptedForkJoinTask.exec(ExecutionContextImpl.scala:121)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Request : HttpRequest(HttpMethod(POST),http://host:9090/engines/ur/events,List(Host: host:9090, User-Agent: agent, Timeout-Access: ),HttpEntity.Strict(application/json,{"event":"$delete","entityType":"item","entityId":"766559","eventTime":"2020-10-21T10:28:02+03:00"}),HttpProtocol(HTTP/1.1))
Response: Complete(HttpResponse(500 Internal Server Error,List(),HttpEntity.Strict(text/plain; charset=UTF-8,There was an internal server error.),HttpProtocol(HTTP/1.1)))
09:28:02.282 INFO ActorSystemImpl - Complete: HttpMethod(POST):http://host:9090/engines/ur/events -> 500 Internal Server Error [3 ms.]

[frutik]

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