Errors were encountered during the configuration of the Search Service Application.

Getting an error when changing topology, trying to move my Search Service App's Admin and Crawl to a new server:

Microsoft.Office.Server.Search.Administration.SearchConfigWizard+SearchConfigWizardException:
Topology provisioning failed due to an error.Crawl component
'415a85c8-1b2b-478a-8e73-881df8ffb218-crawl-0' on SERVERNAMEDEV01 cannot be
dismounted. Check that the server is available. at
Microsoft.Office.Server.Search.Administration.SearchConfigWizard.WaitForTopologyTimerJobToFinish()
at
Microsoft.Office.Server.Search.Administration.SearchConfigWizard.UpdateSearchApp()
at
Microsoft.Office.Server.Search.Administration.SearchConfigWizard.ProvisionSearchServiceApplication()
at
Microsoft.Office.Server.Search.Administration.SearchConfigurationJobDefinition.ExecuteTimerJob()
6/3/2014
11:44:15 AM

Also, when I look at the Search Administration page --> Content Sources, It runs for around 15 minutes and then I get Error The gatherer is shutting down. Correlation ID gives me

06/03/2014 11:49:19.59 w3wp.exe (0x1914) 0x0178 SharePoint Foundation Runtime tkau Unexpected System.Runtime.InteropServices.COMException: The gatherer is shutting down.      at Microsoft.Office.Server.Search.Internal.UI.SearchCentralAdminPageBase.ErrorHandler(Object sender, EventArgs e)     at Microsoft.Office.Server.Search.Internal.UI.SearchCentralAdminPageBase.OnError(EventArgs e)     at System.Web.UI.Page.HandleError(Exception e)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)     at System.Web.UI.Page.ProcessRequest()     at System.Web.UI.Page.ProcessRequest(HttpContext context)     at ASP._admin_search_listcontentsources_aspx.ProcessRequest(HttpContext context)     at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()     at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) 0a424d41-ddae-45d9-a46a-bfe53d97c828