Synchronization issue with specific group names

[jannylund]

We have a long running issue that some specific groups are not being synchronized between JIRA and Sonarqube. (currently JIRA 8.0.0 and Sonar 6.7.4).

For example, given the following group names (yep, 45 chars!)

lorem-ipsum-dolores-dominus-whatever12-admin
lorem-ipsum-dolores-dominus-whatever12-users

Users from the group ending in admin are synced properly, users from the group ending in users are never synchronized and the group will forever stay empty in Sonarqube.

The length of the group names are supported fully within sonarqube and JIRA, and I find it strange that the same lenght works for one but not the other. There are no errors logged whatsoever. Adding users to a different group works, but this specific group is not syncing.