[rabbitmq-discuss] socket error while using rabbitmq and a NAT (Network address translation)

Wed Mar 2 07:01:28 GMT 2011

Ok,
I will repeat my test results fully .
It happens only from certain computers.
It usually throws an exception when the command
factory.newConnection() is invoked.
the exception is ConnectionException. I have it in the initial mail of this
thread.
( I can telnet that port. I can connect from other computers. I can connect
to it with 1.7.0 clients )

I dont think I am acking until that point.

On Tue, Mar 1, 2011 at 5:59 PM, Emile Joubert <emile at rabbitmq.com> wrote:

> Hi,
>
>
> On 01/03/11 14:57, mysurf mail wrote:
>
>> Hi,
>>
>>
>> I setup a trace at the client app server. Set the listen port and
>> connection port and got a log for the unsuccessful
>> factory.newConnection() . I added it in attached the tracelog.txt.
>>
>
> This looks like a normal trace with a successful connection establishment,
> and subsequent exchange and queue declarations. I would be surprised if the
> broker logfile contained an abrupt connection failure at the corresponding
> time. Can you please confirm? If possible please supply a trace of a case
> where an error occurs.
>
>
>  now regarding the other references you gave me
>>
>> 1 Protocol errors:
>>  Acknowledging with an unknown delivery tag
>>  Redeclaring exchanges with different parameters
>>
>> you recommended not acking more than once. This whole thing started when
>> we upgraded the rabbitmq version and Matthias sujested we will change
>> the consumer to ack (i.e. we changed it to
>> channel.basicConsume(queueName, FALSE, queueingConsumer);)
>> (This is if I understood him right )
>> So How can I control the acking . How do I know if I ack more then once.
>>
>
> This is more than a recommendation. From the specification:
>
>  "a client MUST not acknowledge the same message more than once."
>
> Check whether your client contains instances of "channel.basicAck". If you
> acknowledge messages more than once you will see a channel exception.
>
>
> Emile
>
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