client abort and can't connect server immediately

[Shawn Du <sh...@gmail.com>]

Hi,

I am new to activemq artemis, I am using mqtt protocol.
I use eclipse paho java client library to connect server.
I find that when my program connect to server than then kill the 
program, (my program has no chance to call disconnect)
then the client can't connect to server again, the client says: invalid 
client id.
after for a while, maybe 1 minutes later, my program can connect again.
any suggestion?

Thanks advance.
Shawn