There are a couple of errors in the startServer.sh script.

For

-i, --idle_timeout=<num> Idle read timeout, in seconds, used to detect stale connections (default: 60 seconds).
If no new messages have been read within this time, the server disconnects the channel.
Passing 0 disables idle timeout.

if I pass -i 0

./startServer.sh -r hotrod -p 11311 -i 0
May 16, 2010 9:17:50 AM org.infinispan.util.logging.AbstractLogImpl info
INFO: Start main with args: -r, hotrod, -p, 11311, -i, 0
startServer: invalid option – i

There is a typo for -r

-r, --protocol= Protocol to understand by the server. This is a mandatory option and you should choose one of the two options
[memcached|hotrod|websocket]

There are 3 protocols listed, not two options.