This video discusses an approach on using the DIS service logs, to correlate the name of the Mapping specification logs, to help debug the issues for failing mapping runs.
How to unassign services from an expired key and assign them to a valid key in 9.1.0 and 9.5.1
Converting and adding of a self signed certificate to use a Webservice Consumer transformation
How to automate the repository and domain back up process for disaster recovery in PowerCenter