Search on my Exchange 2013 is not working. Event 1009 with source MSExchangeFastSearch is logged in the Application log:
The indexing of mailbox database MB01 encountered an unexpected exception. Error details: Microsoft.Exchange.Search.Core.Abstraction.OperationFailedException: The component operation has failed. ---> Microsoft.Exchange.Search.Fast.FastConnectionException: Connection to the Content Submission Service has failed. ---> Microsoft.Ceres.External.ContentApi.ConnectionException: Given CSS specification failed: Could not connect to CSS node at net.tcp://localhost:17028/ContentSubmissionServices/content with flow: Microsoft.Exchange.Search.WatermarkWriter.12.14. Error: Object reference not set to an instance of an object. Inner exception:--- at Microsoft.Ceres.External.ContentApi.DocumentFeeder.DocumentFeeder.SetCssNodes(IEnumerable`1 newCssNodes) at Microsoft.Ceres.External.ContentApi.DocumentFeeder.DocumentFeeder..ctor(DocumentFeederOptions options) at Microsoft.Exchange.Search.Fast.FastFeeder.Initialize() --- End of inner exception stack trace --- at Microsoft.Exchange.Search.Fast.FastFeeder.Initialize() at Microsoft.Exchange.Search.Fast.Factory.InternalCreateFastFeeder(ISearchServiceConfig config, String indexSystemFlow, String indexSystemName, String instanceName, Int32 numberOfSessions) at Microsoft.Exchange.Search.Fast.FeederStateStorage.SendWatermarkUpdateToFast(Int64 fastId, Int64 watermark) at Microsoft.Exchange.Search.Fast.FeederStateStorage.SetMailboxCrawlerState(MailboxCrawlerState state) at Microsoft.Exchange.Search.Mdb.FeederStateInitializer.EnsureInitialStateSet() 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)>All Exchange services are running, I even created a new mailbox and the same error happens. I'm running Exchange 2013 on Server 2012.