Re: Problems with auto-creation of exchange

[Toralf Lund <to...@pgs.com>]

Hi,

I didn't have time to look into this problem again until today, and now 
I notice that I do use the same session for the sender and receiver. The 
"extra" session object gets created, but is never actually used. It's 
essentially a case of stupidly using the same variable name twice 
combined with confusion about which one is in scope :-( Once I sort out 
this issue, everything works as expected.

- Toralf


On 27/03/15 16:31, Gordon Sim wrote:
> On 03/27/2015 03:12 PM, Toralf Lund wrote:
>> I'm also setting up a temporary receiver with auto-create as a way of
>> making sure a "well-known" receiver queue is set up and bound to the
>> exchange. This is something that's tried and retried until it's
>> successful, but it turns out that the first attempt occurs before the
>> above mentioned sender initialisation. If I remove the receiver setup,
>> everything works fine. So I guess this operation raises type of
>> exception that will block future operations. Does that make sense? Note
>> that I use the same connection object, but a different session, when
>> setting up this receiver.
>
> The session that hits the error would indeed be 'stcuk' in error mode. 
> However it *shouldn't* affect other sessions on the same connection.
>
> In the trace:
>
>> 2015-03-27 15:56:55 [Protocol] trace RECV 
>> [qpid.127.0.0.1:5672-127.0.0.1:44092]: Frame[BEbe; channel=1; 
>> {QueueDeclareBody: queue=pgs.xxx.yyy; alternate-exchange=; 
>> arguments={qpid.last_value_queue:F1:boolean(1),qpid.last_value_queue_key:V2:12:str16(message_type)}; 
>> }]
>> 2015-03-27 15:56:55 [Protocol] trace RECV 
>> [qpid.127.0.0.1:5672-127.0.0.1:44092]: Frame[BEbe; channel=1; 
>> {ExchangeBindBody: queue=pgs.xxx.yyy; exchange=pgs.data; 
>> binding-key=pgs.xxx.yyy.#; arguments={}; }]
>
> this is the receiver, I assume...
>
>> 2015-03-27 15:56:55 [Protocol] error Execution exception: not-found: 
>> Exchange not found: pgs.data (qpid/broker/ExchangeRegistry.cpp:144)
>> 2015-03-27 15:56:55 [Protocol] trace RECV 
>> [qpid.127.0.0.1:5672-127.0.0.1:44092]: Frame[BEbe; channel=1; 
>> {ExecutionSyncBody: }]
>> 2015-03-27 15:56:55 [Protocol] trace SENT 
>> [qpid.127.0.0.1:5672-127.0.0.1:44092]: Frame[BEbe; channel=1; 
>> {ExecutionExceptionBody: error-code=404; command-id=2; class-code=7; 
>> command-code=4; field-index=0; description=not-found: Exchange not 
>> found: pgs.data (qpid/broker/ExchangeRegistry.cpp:144); 
>> error-info={}; }]
>> 2015-03-27 15:56:55 [Protocol] trace SENT 
>> [qpid.127.0.0.1:5672-127.0.0.1:44092]: Frame[BEbe; channel=1; 
>> {SessionDetachBody: name=9606ff50-76b2-495d-932f-de771820763a; }]
>> 2015-03-27 15:56:55 [Protocol] trace RECV 
>> [qpid.127.0.0.1:5672-127.0.0.1:44092]: Frame[BEbe; channel=1; 
>> {SessionDetachedBody: name=9606ff50-76b2-495d-932f-de771820763a; 
>> code=0; }]
>
> ... the session is detached now, and the same error shouldn't be 
> thrown on any other session unless there was a further attempt to use 
> the exchange before it was declared.
>
> Was this trace for a segment of time that included the sender failure? 
> If so is it at all possible the sender is in fact using the same 
> session? (Because the trace doesn't seem to show the senders 
> interactions. There are two sessions attached, but the second isn't 
> really used.)
>
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Re: Problems with auto-creation of exchange

[Gordon Sim <gs...@redhat.com>]

On 04/07/2015 12:28 PM, Toralf Lund wrote:
> I notice that I do use the same session for the sender and receiver
[...]
> Once I sort out this issue, everything works as expected

Super, thanks for the update Toralf!

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