I am experiencing 25% CPU usage on a ubuntu 14.04.03 server which is supposed to be idle. According to htop, load is about 1.0 while the underlying proccess all show 0 to nothing of CPU load.
There are no special services running as I stoped all of them to identify the cause. The high CPU consumption now holds for over 24 hours.
How can I determine the process and fix this issue?
This is a screen shot of htop:
This is a screen shot of top, showing Zookeeper to be responsible for it: