Office Webapp server preview issue in Sharepoint 2013

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SharePoint2013

My sharepoint 2013 site is not able to see preview of office documents through an Office web app server.

After lot of googling, i tried following things suggested in various forums.

• Disconnect the OWA server from SP 2013 farm
• Removed the office web app machine from OWA server
• Added the office web app machine from OWA server
• Set SWOPIZone as internal-HTTP
• Connected the OWA server from SP 2013 farm
• Done iisreset
• Restarted the server
• Checked all the services running up and fine.

Following error gets logged in sharepoint logs:

SPShareByLinkHandler.Initialize : Not a ShareByLink request - missing access token  b894fe9c-5d96-a0c4-77da-572c26983fb4
System.ServiceModel.CommunicationException: There was an error reading from the pipe: The pipe has been ended. (109, 0x6d). ---> System.IO.PipeException: There was an error reading from the pipe: The pipe has been ended. (109, 0x6d).     at System.ServiceModel.Channels.PipeConnection.FinishSyncRead(Boolean traceExceptionsAsErrors)     at System.ServiceModel.Channels.PipeConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)     --- End of inner exception stack trace ---    Server stack trace:      at System.ServiceModel.Channels.PipeConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)     at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.SendPreamble(IConnection connection, ArraySegment`1 preamble, TimeoutHelper& timeoutHelper)    ...  b894fe9c-5d96-a0c4-77da-572c26983fb4

Any help or suggestions will be appreciated.