I have an instance of Solr, hosted with Tomcat that recently started creating minidump files. There are no errors in any of logs, and Solr continues to work with out a hitch.
I never found a way to disable the Java minidumps on windows. The strange part here is that everything on the server worked correctly, besides the hard drive filling up with minidumps.
We eventually re-installed everything, same version of Solr/Java/Tomcat onto a linux machine and didn't have the problem any more. I would imagine that re-installing everything onto a windows machine would have also fixed the problem. This was a strange one.