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I have Windows Server 2012 (RTM) and SharePoint Server 2013 Enterprise (RTM) and SQL Server Enterprise 2012 with SP1 (RTM1).

Constantly (about every 60 seconds) I have in Application log and SharePoint ULS logs this error message:

03.16.2013 16:21:59.97  Microsoft.Office.Server.Convers (0x0604)    0x0948  Document Conversions    Launcher Service    7jg8    Medium  Calling LoadBalancer.RegisterLauncher   
03.16.2013 16:21:59.97  Microsoft.Office.Server.Convers (0x0604)    0x0948  Document Management Server  Document Conversions    7933    Critical    The Office HTML Viewer Service could not be registered with Office HTML Load Balancing Service.  Error:  The underlying connection was closed: An unexpected error occurred on a send.  
03.16.2013 16:21:59.97  Microsoft.Office.Server.Convers (0x0604)    0x0948  Document Conversions    Launcher Service    7jgs    Medium  Loadbalancer not running or available to launcher id 1  

I have single server and service: Document Conversions Load Balancer Service , with server hostname and default Communication Scheme: HTTP and default port: 8093

How to fix this error ?

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1 Answer 1

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It seems that SharePoint 2013 installation did not put Windows Firewall exception. I have manually added Windows Firewall rule to allow incoming TCP/8093 port and error is not appearing anymore.

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Can you please mark this as an answer so that this question does not show up as unanswered :) –  Robert Lindgren Mar 25 at 11:57

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