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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-7193) Make legacy client fail in clear manner when connecting to a peer that replies AMQP 1.0
Date Fri, 08 Apr 2016 17:29:25 GMT
Keith Wall created QPID-7193:
--------------------------------

             Summary: Make legacy client fail in clear manner when connecting to a peer that
replies AMQP 1.0
                 Key: QPID-7193
                 URL: https://issues.apache.org/jira/browse/QPID-7193
             Project: Qpid
          Issue Type: Improvement
          Components: Java Client
            Reporter: Keith Wall


If the legacy Java Client is connected to the peer that doesn't support its requested AMQP
protocol and responds AMQP 1.0, the Java Client currently fails in a less than clear fashion:

In default configuration, where the 0-10 delegate is used by default, the following is see:
{noformat}
javax.jms.JMSException: Error creating connection: Protocol: 0.0 is required by the broker
but is not currently supported by this client library implementation
	at org.apache.qpid.client.AMQConnectionFactory.createConnection(AMQConnectionFactory.java:134)
	at org.apache.qpid.client.AMQConnectionFactory.createConnection(AMQConnectionFactory.java:57)
	at org.apache.qpid.example.Hello.runTest(Hello.java:60)
	at org.apache.qpid.example.Hello.main(Hello.java:48)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: org.apache.qpid.AMQProtocolException: Protocol: 0.0 is required by the broker but
is not currently supported by this client library implementation [error code 543: client unsupported
protocol]
	at org.apache.qpid.client.AMQConnection.initDelegate(AMQConnection.java:644)
	at org.apache.qpid.client.AMQConnection.makeConnection(AMQConnection.java:531)
	at org.apache.qpid.client.AMQConnection.<init>(AMQConnection.java:484)
	at org.apache.qpid.client.AMQConnectionFactory.createConnection(AMQConnectionFactory.java:130)
	... 8 more
Caused by: java.lang.ClassNotFoundException: org.apache.qpid.client.AMQConnectionDelegate_0_0
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:190)
	at org.apache.qpid.client.AMQConnection.initDelegate(AMQConnection.java:626)
	... 11 more

{noformat}

If client is configured to use a older protocol (with {{qpid.amqp.version}}), the client hangs
and then times-out.





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