I don't know if anyone can make sense of these, but these are the server events that occur during the failed process - sorry for the long post. There are basically four error events whenever the job is run (reverse chronological order):
The Execute method of job definition Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJobDefinition (ID 89e39c81-72da-43a9-9abf-9c947c0ba08e) threw an exception. More information is included below.
The request failed with HTTP status 503: Service Unavailable.
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Publishing: Content deployment job failed. Error: 'System.Net.WebException: The request failed with HTTP status 503: Service Unavailable.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Microsoft.SharePoint.Publishing.Internal.Administration.ContentDeploymentRemoteImportSoapClient.CreateJob(String description, String sourceId, String destinationServerUrl, String destinationSiteCollection, SPIncludeSecurity includeSecurity, SPImportUserInfoDateTimeOption includeUserInfoDateTime, Boolean enableEventReceivers)
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.DoServerToServer()
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.ExecuteJob()
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.Run(Boolean runAsynchronously)
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJobDefinition.Execute(Guid targetInstanceId)'
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Publishing: Content deployment job failed. Error: 'System.Net.WebException: The request failed with HTTP status 503: Service Unavailable.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Microsoft.SharePoint.Publishing.Internal.Administration.ContentDeploymentRemoteImportSoapClient.CreateJob(String description, String sourceId, String destinationServerUrl, String destinationSiteCollection, SPIncludeSecurity includeSecurity, SPImportUserInfoDateTimeOption includeUserInfoDateTime, Boolean enableEventReceivers)
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.DoServerToServer()
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.ExecuteJob()
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.Run(Boolean runAsynchronously)'
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Failed to communicate with destination server for Content Deployment job 'Quick Deploy job for path 'Path1''. Exception was: 'System.Net.WebException: The request failed with HTTP status 503: Service Unavailable.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Microsoft.SharePoint.Publishing.Internal.Administration.ContentDeploymentRemoteImportSoapClient.CreateJob(String description, String sourceId, String destinationServerUrl, String destinationSiteCollection, SPIncludeSecurity includeSecurity, SPImportUserInfoDateTimeOption includeUserInfoDateTime, Boolean enableEventReceivers)
at Microsoft.SharePoint.Publishing.Administration.ContentDeploymentJob.DoServerToServer()'