Lorenz Quack created QPID-7905:
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Summary: [Java Client AMQP 0-x] Connection#start is not thread-safe
Key: QPID-7905
URL: https://issues.apache.org/jira/browse/QPID-7905
Project: Qpid
Issue Type: Bug
Components: Java Client
Reporter: Lorenz Quack
Priority: Critical
The JMS spec says that Connections may be used from several threads
concurrently.
However, our implementation of {{Connection#start}} is currently not
thread-safe. It iterates over its list of sessions and calls {{Session#start}}.
The session rightfully (this is specified in the JMS spec as well) assumes that
it is being called from a single thread.
An example of the impact of this is that a session can be used (by
{{Connection#start}}) after it has been closed (via {{Session#close}}) leading
to an Exception due to the broker receiving a frame with an unknown
{{channelId}}.
Note: The comment on {{Connection#start}} stating that JMS allows for non
thread-safe implementations seems to be in error!
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