...
Most of the interesting and relevant information will usually be found in the shibd.log, particularly SAML-related problems, Metadata issues, and most security issues. It's somewhat rare to actually need the native.log (which is one reason the permission issue noted above has never been seriously addressed). Under routine use, very little ends up in that log (or at least not only there), but one common problem that may depend on using it is the pass-through issue.
...