Hi List
I wonder if some of the devs could look at the dialog code and maybe
confirm my observation of this supposed Bug in Kamailio 5.6
Situation:
Two Kamailio, dialog counters synced via DMQ and each node using a
local DB as dialog backend.
Goal is to count channel usage per customer.
modparam("dialog", "db_mode", 1 )
modparam("dialog", "enable_dmq", 1)
modparam("dialog", "h_id_start", -1) # Use server_id
modparam("dialog", "h_id_step", 2)
modparam("dialog", "profiles_with_value", "custcallcounter")
If 'JohnDoe' is involved in a call, I do:
set_dlg_profile("custcallcounter","JohnDoe");
To check how many calls are busy by JohnDoe I do:
get_profile_size("custcallcounter","JohnDoe","$var(channel_use)");
Picture this situation:
JohnDoe is initiating a first call via Node1:
Node1 created the dialogue and variables, writes them to the database
and replicates the dialog vars to Node2 => IN MEMORY
Nothing about the running dialog is being written to the Database on
Node2, but get_profile_size returns the count on Node2.
So while the first call aka dialog is running via Node1, JohnDoe is
initiating a second call, this time via Node2.
Node2 creates the dialog and writes this to the database. Then the
profile with Name 'JohnDoe' is INCREASED on Node2.
This is when I suddenly find the dialog_vars on the Node2 database
containing information about the dialog started on Node1. So I guess
writing to a dialog counter triggers the dialog_vars being written to
the Database.
When JohnDoe is ending it's first call, then the dialog and dialog_vars
are cleaned out of the database on Node1, but NOT on Node2
What I fear happens next: They dialog_vars remaining on the Database of
Node 2 accumulate more and more, making the database slower. When a
call happens to re use the same hash id and entry, things start going
really badly.
Could I be right?
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
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Schweiz Web http://www.imp.ch
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