Is there any limit of Client Queue in HiveMq ?
you can set the maximum queue size in your config.xml. The default value if none is set is 1000 per individual client.
<mqtt> <queued-messages> <max-queue-size>1000</max-queue-size> </queued-messages> </mqtt>
I think there should be some upper limit for a client-queue that I want to know.
You will run into limitations of your machine long before reaching these queue sizes. Technically the upper limit would be 9.223.372.036.854.775.807.
Did not get you properly with these number.