After migrating from SVN to Git, java.lang.IllegalArgumentException started to occur atleast couple of times a week on daily build, while checking out the source code. Re-starting the Jenkins Slave on the build server, helped us to go past the issue temporarily and root cause exploration continued.
Earlier the assumtions & focus was to rule out options around issues with Git installation / configuration but later narrowed down that the incorrect version of Jenkins Slave installed was the causing IllegalArgumentException.
Solution:
Updating the Jenkins slave from v2.2.x to 2.37 resolved the issue.
