Selector is component responsible for selecting next targets. You can check if it is running by executing ps -A|grep selector. If the reply is not empty, e.g. you will receive:
<xterm2> user@host:~$ ps -A|grep selector 19126 pts/7 00:00:00 rts2-selector user@host:~$ </xterm2>
then selector is running. If you would like to work directly with the executor, you shall proceed with following instructions to disable it.
You can see screencast of this action in this screencast.
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