[ openjms-Bugs-1611385 ] Client-Server Connection hangs and locks clients

Bugs item #1611385, was opened at 2006-12-08 10:59
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Category: server
Group: v0.7.7-alpha-3
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Peter De Leuze (cajundust)
Assigned to: Nobody/Anonymous (nobody)
Summary: Client-Server Connection hangs and locks clients

Initial Comment:
OpenJMS works fine for 2-3 days, then suddenly, client connections seem to keep hanging on the server side. 

When doing a netstat:
tcp        0      0 ::ffff:192.168.111.190:3035 ::ffff:192.168.111.166:1397 ESTABLISHED
tcp        0      0 ::ffff:192.168.111.190:3035 ::ffff:192.168.111.162:1389 ESTABLISHED
tcp        0      0 ::ffff:192.168.111.190:3035 ::ffff:192.168.111.161:1193 ESTABLISHED

And these hanging connections cause all new incoming client connections to lock on creating a session on the connection. 
The place where the client JMS implementation blocks is:

 javax.jms.ConnectionFactory factory = (ConnectionFactory) context.lookup("TCPConnectionFactory");
 javax.jms.Connection connection = factory.createConnection();

 // blocks here forever !
 // -----------------------
 javax.jms.Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
 // -----------------------

This situation is only resolved when stopping the jms server and restarting it. Then it works fine again for 2-3 days, and the whole problem reoccurs.

The problem mostly occurs when client applications connect through a VPN, and when the connection is then lost because the VPN disconnects. 
There should be a (server.xml) configurable option that stalled connections should be disconnected after a while, but there is no configuration option.

Also in the JMS client API, there is no way to set a connection timeout when creating a session from a connection object or when sending a message on a disconnected connection.
connection.stop,close or session.close does not do anything !!! The client keeps blocked on the connection.createSession !

Please take this bug serious, because it seems that others also have this problem.


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