Memory leak in JS7 Controller branch 2.7

Current Situation

In a controller cluster some memory is eaten.

Command to measure the memory consumption (memory usage will displayed with column MU):

#/bin/bash
jstat -gc `cat /home/controller/var/logs/controller.pid` 60000 | gawk '{print strftime("%m/%d/%Y %H:%M:%S"), $0; fflush()}' >> /home/cont_m_jstat.txt

Desired Behavior

No memory leak should be eaten by the Controller .