Our 4 Jenkins installations (all on the same HW) are running at 100% CPU after some time, until they get restarted. Sometimes all of them or only some of them are affected by this.
I had a closer look at one installation and found out IOHub is running out of control. I added a logger to the class and it prints dozens of "0 scheduled tasks to process" per secound, nothing else.
See the attached screenshots of VisualVM for details, the jenkis was idle at the point of record.
I could provide more infos if someone tells what is needed.