Shashank Krishnaswamy created AMQ-8255:
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Summary: Wrong exception propagation on reaching Broker Connection
Limit
Key: AMQ-8255
URL: https://issues.apache.org/jira/browse/AMQ-8255
Project: ActiveMQ
Issue Type: Bug
Components: Broker, JMS client
Affects Versions: 5.15.13
Environment: *Broker Details:*
* Version - 5.15.12
* Hosted on AWS (Amazon MQ)
* Instance type - mq.t3.micro with a limit of 100 connections
*Client Details:*
* Version - 5.15.13
* Using openwire/jms client
* running on linux **
Reporter: Shashank Krishnaswamy
Hi,
I am trying to add exception handling at activemq client side around connection
setup. Based on my experiment I found that whenever Broker reaches the maximum
connection limit, client receives 3 types of generic exceptions -
_SSLHandshakeException, SocketException & TransportDisposedIOException._ These
exceptions could occur if there is connectivity issue or
[truststore/certificate related
issue|http://activemq.2283324.n4.nabble.com/Javax-net-ssl-SSLHandshakeException-td4722408.html].
This has made exception handling impossible as it is not possible to know if
the error is retry-able (recoverable) or not.
The ask here is to provide better signal from Broker (or client library) so
that application can handle recoverable and non recoverable errors differently.
Suggestion options
# Let
[connection|https://activemq.apache.org/maven/apidocs/org/apache/activemq/ActiveMQConnection.html#start%E2%80%93].start()
throw [ExceededMaximumConnectionsException
|https://activemq.apache.org/maven/apidocs/org/apache/activemq/transport/tcp/ExceededMaximumConnectionsException.html]
# Let client provide exception via listeners
** [Client internal exception
listener|https://activemq.apache.org/maven/apidocs/org/apache/activemq/ClientInternalExceptionListener.html]
** [Exception
listener|https://activemq.apache.org/maven/apidocs/org/apache/activemq/ActiveMQConnection.html#setExceptionListener-javax.jms.ExceptionListener-]
** [Transport
Listener|https://activemq.apache.org/maven/apidocs/org/apache/activemq/transport/TransportListener.html]
# Or provide new API to get current number of client connections.
Thanks
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