On Mon, Jan 16, 2012 at 9:47 AM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

On 1/13/12 12:27 PM, Javier Gallart wrote:
Hi Daniel

both values are null.

ok, could be a hint that the connection is down and try a reconnect...

I might have found something: apparently some of the sockets kamailio->redis were inactive for a while and were being closed in the redis end.

Do you know if there is a keepalive mechanism that reddis offers, or a command to set the timeout value from the client side?

In redis config file the only related value I've seen is "timeout". If set to 0, the server never disconnects inactive clients. From the client perspective, what about this: http://www.redis.io/commands/ping

Regards

Javi

Cheers,
Daniel
This is redis default config:

# Close the connection after a client is idle for N seconds (0 to disable)

timeout 600

I've set the timeout value to 0 to confirm if this is actually the problem.

In case it might be useful for somebody, we've used lsof in recurrent mode to monitor the sockets status:

server# lsof -i :6379 -r 5"m===%T===" | grep -e == -e kamailio

===05:28:26===

kamailio 13365 kamailio 4u IPv4 58622 0t0 TCP localhost:34994->localhost:6379 (ESTABLISHED)

kamailio 13366 kamailio 4u IPv4 58626 0t0 TCP localhost:34995->localhost:6379 (ESTABLISHED)

kamailio 13367 kamailio 4u IPv4 58628 0t0 TCP localhost:34996->localhost:6379 (ESTABLISHED)

kamailio 13368 kamailio 4u IPv4 58632 0t0 TCP localhost:34997->localhost:6379 (ESTABLISHED)

kamailio 13369 kamailio 4u IPv4 58649 0t0 TCP localhost:35000->localhost:6379 (ESTABLISHED)

kamailio 13370 kamailio 4u IPv4 58661 0t0 TCP localhost:35003->localhost:6379 (ESTABLISHED)

kamailio 13376 kamailio 10u IPv4 58710 0t0 TCP localhost:35013->localhost:6379 (ESTABLISHED)

kamailio 13377 kamailio 4u IPv4 58705 0t0 TCP localhost:35012->localhost:6379 (ESTABLISHED)

kamailio 13378 kamailio 4u IPv4 58695 0t0 TCP localhost:35008->localhost:6379 (ESTABLISHED)

kamailio 13381 kamailio 4u IPv4 58691 0t0 TCP localhost:35006->localhost:6379 (ESTABLISHED)

kamailio 13382 kamailio 4u IPv4 58693 0t0 TCP localhost:35007->localhost:6379 (ESTABLISHED)

===05:28:31===

kamailio 13365 kamailio 4u IPv4 58622 0t0 TCP localhost:34994->localhost:6379 (ESTABLISHED)

kamailio 13366 kamailio 4u IPv4 58626 0t0 TCP localhost:34995->localhost:6379 (CLOSE_WAIT)

kamailio 13367 kamailio 4u IPv4 58628 0t0 TCP localhost:34996->localhost:6379 (ESTABLISHED)

kamailio 13368 kamailio 4u IPv4 58632 0t0 TCP localhost:34997->localhost:6379 (CLOSE_WAIT)

kamailio 13369 kamailio 4u IPv4 58649 0t0 TCP localhost:35000->localhost:6379 (CLOSE_WAIT)

kamailio 13370 kamailio 4u IPv4 58661 0t0 TCP localhost:35003->localhost:6379 (CLOSE_WAIT)

kamailio 13376 kamailio 10u IPv4 58710 0t0 TCP localhost:35013->localhost:6379 (CLOSE_WAIT)

kamailio 13377 kamailio 4u IPv4 58705 0t0 TCP localhost:35012->localhost:6379 (CLOSE_WAIT)

kamailio 13378 kamailio 4u IPv4 58695 0t0 TCP localhost:35008->localhost:6379 (CLOSE_WAIT)

kamailio 13381 kamailio 4u IPv4 58691 0t0 TCP localhost:35006->localhost:6379 (CLOSE_WAIT)

kamailio 13382 kamailio 4u IPv4 58693 0t0 TCP localhost:35007->localhost:6379 (CLOSE_WAIT)

Regards

Javi

On Fri, Jan 13, 2012 at 9:35 AM, Daniel-Constantin Mierla <miconda@gmail.com> wrote:

Hello,

On 1/13/12 8:00 AM, Javier Gallart wrote:

Hi all

I have started making some tests with the ndb_redis module. So far we have not stressed the module (no more than 5 HGET commands/second at maximum). It works well, but with at some point it starts failing. The failures are easily found because the logs always show this:
INFO: <core> [main.c:811]: INFO: signal 13 received

this due to a broken connection. What do you get in redis reply and info variables?

After that the redis value is always null. If I restart kamailio it starts working again.
I've run kamailio with debug=4 but I haven't seen more useful information. On the redis side, I could find nothing in the logs either, the number of clientes connected is alway much less than the configured maximum, Any idea?
On the other hand, if I restart redis we need to restart kamailio to restore the connections. Is the reconnection to redis on the roadmap?

It should not be that complex, there is the code for initializing the connection, it should be reused for doing it again in case of failure.

Cheers,
Daniel

--
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda
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