There have been a couple of issues reported of people getting errors when running on newer JVM's. For example:

#206
#214

This is an error in the SVNKit library (which we optionally use but are not the maintainers for). The recommended workaround is to use the JavaHL library. This is what we recommend all users use anyway. The only issue with it is that on MacOS and Linux you have to install the native libraries and do some configuration and this is not always easy to do. We try to maintain help for these steps in our Wiki:

https://github.com/subclipse/subclipse/wiki/JavaHL-on-Linux
https://github.com/subclipse/subclipse/wiki/JavaHL-on-OSX

There is also a JVM runtime option you can add to your eclipse.ini that will allow SVNKit to work properly. There is information on that option in this Eclipse bug report:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575213

At the time of this posting, it looks like SVNKit has fixed this problem in their library, they just have not issued a new release. You can keep an eye on this page for a future version that contains the fix. The current version right now is 1.10.3 and it still has the problem.

https://svnkit.com/download.php