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https://issues.apache.org/jira/browse/QPID-7193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keith Wall resolved QPID-7193.
------------------------------
Resolution: Won't Fix
> 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
> Fix For: qpid-java-6.1
>
>
> 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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