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<p class="MsoNormal">We’ve been having occasional problems with connection errors
using the Rabbit .NET Client v3.0.4. This manifests itself initially with the
error:</p>
<p class="MsoNormal">Shutting down connection. Reason: AMQP close-reason,
initiated by Peer, code=503, text="COMMAND_INVALID - second 'channel.open'
seen", classId=20, methodId=10, cause=</p>
<p class="MsoNormal">We attempt to Dispose the connection object at this point to
make sure we’ve released all resources, but get an ObjectDisposedException from
the underlying NetworkStream. We then attempt to reconnect and start consuming
again, but although the connection and channels appear to create successfully
we don’t receive messages off the queue.</p>
<p class="MsoNormal">I believe the underlying connection we are using is in a bad
state.</p><p class="MsoNormal">I’ve noticed some other discussions online about a problem
where a duplicate channel number may be allocated. I see that the only
difference between the .NET 3.1.1 client and the 3.0.4 client is a fix has been
made to the way the IntAllocator class allocates integers. I assume that is
this bug in the release notes:</p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">.NET
client</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">-------------</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">bug
fixes</span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">25558
fix a bug that could lead to duplicate channel IDs being allocated,</span><span style="font-size:10.0pt;font-family:"Courier New""> causing a connection failure</span>
</p><p class="MsoNormal">Do you have any more information about this bug? Do you
think this fix would be relevant to the problems we are seeing? Is there any </p>
<p class="MsoNormal">(I’m considering whether we should urgently patch our
software to upgrade us onto 3.1.1 client.)</p>
<p class="MsoNormal">Best Regards,</p>
<p class="MsoNormal">David Priddle</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
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