how to increase AmazonMQ maximum connections

Question

2019-08-01 06:04:43,263 | ERROR | Could not accept connection : org.apache.activemq.transport.tcp.ExceededMaximumConnectionsException: Exceeded the maximum number of allowed client connections. See the 'maximumConnections' property on the TCP transport configuration URI in the ActiveMQ configuration file (e.g., activemq.xml) | org.apache.activemq.broker.TransportConnector | ActiveMQ Transport Server Thread Handler: nio+ssl://b-e13f27f2-1fa3-419f-819c-a24277e973a8-2.mq.us-west-2.amazonaws.com:61617?maximumConnections=100&wireFormat.maxFrameSize=104857600

Getting above exception on amazonMQ, earlier we were using activeMQ where we were setting something like

<transportConnectors>
        <!-- DOS protection, limit concurrent connections to 1000 and frame size to 100MB -->
        <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&amp;wireformat.maxFrameSize=104857600"/>
    </transportConnectors>

In amazonMQ we are unable to find such options and broker is throwing exception. We did checked transportConnector on amazonMQ supports :

1. name
2. updateClusterClients
3. rebalanceClusterClients
4. updateClusterClientsOnRemove

Any idea how can we increase size of maximum connections?

Answer 1

As listed here that limit can be changed per AWS account.

You will need to open up an AWS support ticket requesting a limit increase