Hi Luis,

The short, basic answer is: nothing. The proxy does not intrinsically know about dialog state, only transaction state. The result is rather the same as if you were running a stateless proxy. Thus, any in- dialog requests arising subsequently to the restart will continue to be properly routed on the basis of their To tag, their Route header, etc. Of course, if any dialogs are tracked with the 'dialog' module, they will be forgotten -- even if you are using a db_mode that implies 100% synchronized database backing, because there is still a great deal of dialog information held in runtime memory. So, if you are using 'dialog' profiles with values to, for example, enforce concurrent call limits, those counters will be 0 after restart.

Aside from that, the only other thing I can think of that would be of significance happens at the transactional level, not the dialog level. Replies are statefully routed to the orginator of a request by TM using in-memory state information that is lost during a reboot. Thus, for example, if you have a dialog whose establishment is in progress (180 or 183, for instance), and at that point you restart Kamailio, then a subsequent 200 OK is generated, it will not be properly relayed back to the near-end endpoint. There are other ways to statelessly route a reply, but the point is if you are using TM then you are not using those ways, but taking advantage of stateful proxy's transactional memory.

To sum up: a reboot won't break things *too* badly - certainly, no existing calls will drop or fail to be hung up properly later - but is generally undesirable.

-- Sent from mobile device

On Oct 25, 2009, at 10:36 AM, Luis Jimenez ljjimenez@gmail.com wrote:

Hello, list.

Exactly what happens with a dialog (at accounting level) when i reload kamailio with dialogs in process?

Thanks in advance. Luis Jimenez

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