[rabbitmq-discuss] SSL_TIMEOUT

Wed Sep 18 11:30:55 BST 2013

Matthias,
DNS we can fix for sure.
But we cannot make 200Mhz CPU run any faster.

On 18/09/13 11:15, Matthias Radestock wrote:
> On 18/09/13 11:04, Dmitry Andrianov wrote:
>> We are experiencing troubles with Java clients connecting to Rabbit over
>> SSL. Two problems caused by the very same issue:
>> * When DNS server takes more than 5 seconds in reverse resolving IP
>> address back to name, Rabbit aborts the connection. I assume Java SSL
>> layer does that lookup AFTER the TCP connection is already established
>> in order to decide which client certificate to provide.
>> * When Java client is running on a limited processing power hardware, it
>> again takes it more than 5 seconds to finish the SSL handshake and
>> again, Rabbit server resets the connection.
>>
>> I saw that reply from Emile which states SSL_TIMEOUT is not configurable
>> http://rabbitmq.1065348.n5.nabble.com/Request-Handshake-Timeout-Increase-tt11342.html#a11346
>>
>> And as I see in the sources, nothing has changed since then.
>>
>> So my question is - do you have any plans for fixing it in the near future?
> We have no immediate plans of making the timeout configurable. That's
> not to say we won't.
>
>> Are there any options we can modify it at runtime without rebuilding
>> Rabbit?
> Nope.
>
>> Timeout of 5s is just too short really.
> 5 seconds is a loooooong time. I suggest you look into why DNS queries
> are taking so long in your set up.
>
> Matthias.

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