Sever 2012 r2 error 1009 Need Assistance.

Hi there everyone im 100% new to windows servers have very little experience with trouble shooting server errors. I got dropped in to a position due to current tech leaving. I have a reoccurring error 1009 MSExchangeFastSearch which keep happening every minutes.  Like i said i have very little experience with servers or where anything is. Just looking for some help to fix this.

The indexing of mailbox database Mailbox Database 1335734779 encountered an unexpected exception. Error details: Microsoft.Exchange.Search.Core.Abstraction.OperationFailedException: The component operation has failed. ---> Microsoft.Exchange.Search.Core.Abstraction.OperationFailedException: The component operation has failed. ---> System.ServiceModel.EndpointNotFoundException: Could not connect to net.tcp://localhost:3847/. The connection attempt lasted for a time span of 00:00:02.0469130. TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:3847.  ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:3847
   at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
   at System.ServiceModel.Channels.SocketConnectionInitiator.ConnectAsyncResult.OnConnect(IAsyncResult result)
   --- End of inner exception stack trace ---

Server stack trace: 
   at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at System.ServiceModel.Channels.CommunicationObject.EndOpen(IAsyncResult result)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at System.ServiceModel.ICommunicationObject.EndOpen(IAsyncResult result)
   at Microsoft.Exchange.Search.OperatorSchema.PagingImsFlowExecutor.CreateProxy()
   at Microsoft.Exchange.Search.OperatorSchema.PagingImsFlowExecutor.AcquireProxy()
   at Microsoft.Exchange.Search.OperatorSchema.PagingImsFlowExecutor.ExecuteServiceCall(IProcessingEngineChannel& serviceProxy, Action`1 call, Int32 retryCount)
   at Microsoft.Exchange.Search.OperatorSchema.PagingImsFlowExecutor.ExecuteAndReadPage(QueryParameters parameters, String outputName)
   at Microsoft.Exchange.Search.OperatorSchema.PagingImsFlowExecutor.GetHitCount(QueryParameters parameters)
   at Microsoft.Exchange.Search.OperatorSchema.PagedReader.get_Count()
   at Microsoft.Exchange.Search.Fast.ExchangeQueryExecutor.RunUnderExceptionHandler[T](Func`1 call, IDiagnosticsSession session, String flowName)
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Search.Fast.ExchangeQueryExecutor.RunUnderExceptionHandler[T](Func`1 call, IDiagnosticsSession session, String flowName)
   at Microsoft.Exchange.Search.Fast.ExchangeQueryExecutor.ExecutePagedQueryByDocumentId(String flowName, String query, Guid tenantId, IndexSystemField[] extraFieldsToReturn, Int64 startingDocId, Int32 maxResults)
   at Microsoft.Exchange.Search.Fast.FailedItemStorage.GetPoisonDocuments()
   at Microsoft.Exchange.Search.Engine.DocumentTracker.Initialize(IFailedItemStorage failedItemStorage)
   at Microsoft.Exchange.Search.Engine.SearchFeedingController.InitializeFastFeederAndWatermarkStorage()
   at Microsoft.Exchange.Search.Engine.SearchFeedingController.InternalExecutionStart()
   at Microsoft.Exchange.Search.Core.Common.Executable.InternalExecutionStart(Object state)
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Search.Core.Common.Executable.EndExecute(IAsyncResult asyncResult)
   at Microsoft.Exchange.Search.Engine.SearchRootController.ExecuteComplete(IAsyncResult asyncResult)