I have a grails 2.3.7 project that is using cobertura plugin, it works perfectly fine.
But when I upgraded to 2.3.9 it stopped working.
This is some of the relevant parts of the stacktrace that I get.
Error Cobertura: Error reading from object stream.
java.lang.ClassNotFoundException: net.sourceforge.cobertura.coveragedata.PackageData
...
Cobertura: Coverage data file /home/user/cobertura.ser either does not exist or is not readable. Creating a new data file.