Hi, 

I cannot talk about the fix without spending time looking at the code.

I have never seen these processes (swish-efs, etc.). Before you kill then, 
do the following
ps -lef | grep swish
or possibly: ps ax | grep swish

It will give you some info on where is the executable of those processes 
containing swish, and how long it has been running, so you can track where 
it comes from. See the parent process id, and you may know where it comes 
from.

Stephane