This looks almost exactly like
JENKINS-67491 which got reported against 4.10.1 and had a fix released in 4.10.2: https://github.com/jenkinsci/git-plugin/pull/1202/files
On the other issue, the trace showed GitChangeSet.java:460 and that code got wrapped with a try/catch to get org.springframework.security.core.AuthenticationException exceptions. That code tries to lookup a user based on the first part of the email address. So if the author is Jane <email@example.com>, it tries to find "jfoo".
On this issue the trace occurs slightly above at GitChangeSet.java:450 which has:
user = User.get(csAuthor, false, Collections.emptyMap());
That searches for the, I am guessing, author name and would try to lookup "Jane".
We have the same issue at GitChangeSet.java:450 reported at https://phabricator.wikimedia.org/T315897 . The user "TheresNoTime" is disabled in our LDAP (the person uses a different LDAP account) but they craft their commit with that name in the author field.
I am guessing the same try/catch should be made when looking up the user by the user name.