openTSDB is checking for zookeeper at port 2181. How can I change it to make it point to another port -

opentsdb checking zookeeper @ port 2181. how can change make point port. not able find configuration file can make change opentsdb check port.

at port zookeeper running? if running opentsdb following step:

http://opentsdb.net/docs/build/html/installation.html 

when running opentsdb can specify port no

./build/tsdb tsd --port=4242 --staticroot=build/staticroot --cachedir="$tsdtmp" --zkquorum=myhost:2181

myhost:2181 zookeeper hostname , port no. change port no.