[SR-Users] ndb_redis set <null> reply to EXISTS query

Javi Gallart jgallart at systemonenoc.com
Fri Feb 27 14:48:30 CET 2015


Hello

I ignore your setup, a few tips that can help you to narrow down the 
problem:

-Make sure your kamailio is connected to redis: 'redis-cli info | grep 
connected_clients' should show a number bigger than the number of 
kamailio children

-Print with xlog the value of $si before calling redis_cmd

-At the redis prompt (redis-cli) type the command EXISTS x, with x being 
the value of $si. If that gives you a 1 it means that the key exists, 
otherwise you need to create it.

-Pritn the values of $redis(s=>type), $redis(s=>value) after calling 
redis_cmd

-With redis-cli monitor you are goign to see all the commands sent to redis

Javi
On 27/02/15 14:30, Yuriy Gorlichenko wrote:
> What type of info can I provide for deeper analys of this situation?
>
> 2015-02-27 14:34 GMT+03:00 Javi Gallart <jgallart at systemonenoc.com 
> <mailto:jgallart at systemonenoc.com>>:
>
>     Hello
>     On 27/02/15 11:58, Yuriy Gorlichenko wrote:
>>     at the monitor I see nothing about this request
>     It's difficult to say without further information, but for some
>     reason your command is not hitting redis, probably because the
>     connection is down.
>
>     Javi
>
>>
>>     2015-02-27 13:21 GMT+03:00 Yuriy Gorlichenko <ovoshlook at gmail.com
>>     <mailto:ovoshlook at gmail.com>>:
>>
>>         Now I see that null values recieved after I see this at
>>         kamailio log
>>
>>         redisc_exec(): Redis error: Server closed the connection
>>
>>
>>         2015-02-27 12:45 GMT+03:00 Javi Gallart
>>         <jgallart at systemonenoc.com <mailto:jgallart at systemonenoc.com>>:
>>
>>             Hello,
>>             check out http://redis.io/commands/monitor
>>             It will help you to determine the exact command that
>>             kamailio is delivering to the server when you execute the
>>             redis_cmd(...) function inside the script.
>>             For a non null reply, yo will need a key in redis with
>>             the same value as $si.
>>
>>             Javi
>>
>>             On 27/02/15 10:04, Yuriy Gorlichenko wrote:
>>>             I will try. I new at redis. Does cli monitor get resul
>>>             of kamailio request at the cli?
>>>
>>>             2015-02-27 11:38 GMT+03:00 Javi Gallart
>>>             <jgallart at systemonenoc.com
>>>             <mailto:jgallart at systemonenoc.com>>:
>>>
>>>                 Hello
>>>
>>>                 can you check with "redis-cli monitor" what is the
>>>                 command sent to Redis in that case?
>>>
>>>                 Javi
>>>                 On 27/02/15 09:15, Yuriy Gorlichenko wrote:
>>>>                 Hello I try to get some replies from redis. Time
>>>>                 after time redis request give me null result. But
>>>>                 redis bs not disconnected.
>>>>
>>>>                 This happens only with websocket endpoints. My
>>>>                 queries is:
>>>>
>>>>                 redis_cmd("srv1", "EXISTS $si", "s");
>>>>
>>>>                 So at xLOG i see that $si correctly sended, but
>>>>                 result is null. At db I keep key IP with value
>>>>                 TIMESTAMP
>>>>
>>>>                 Intresting that route, that givesme this result
>>>>                 idependend of WS or UDP endpoint. IT does not know
>>>>                 about it anything.
>>>>
>>>>
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>>>
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>>
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