Re: [SR-Users] RPC command dlg.list (for large amounts of dialogs)

By the way, I have not tried connecting to the binrpc interface via network socket and retrieving the output that way. I am only trying to connect to it via the 'kamcmd' utility via the default UNIX domain socket.

On 08/14/2013 08:37 AM, Alex Balashov wrote:

Hello,

I am having trouble getting a large list of dialogs (800+) out of Kamailio using the dlg.list binrpc command.

I posted a while back that the list of dialog data was coming back truncated, and was told to increase:

 modparam("ctl", "binrpc_max_body_size", ...)
 modparam("ctl", "binrpc_struct_max_body_size", ...)

I did that, increasing the buffers to 20 MB. Then, when I ran

sercmd -s unixs:/tmp/kamailio_ctl dlg.list

I got:

ERROR: reply too big

which clearly seemed to be on the client side now.

So, I looked in the sources for sercmd (now sercmd), in sip-router/utils/sercmd/sercmd.c, and found this:

 if ((ret=get_reply(s, reply_buf, MAX_REPLY_SIZE, cookie, &in_pkt,
                 &msg_body))<0){
     switch(ret){
         case -1:
             goto error_read;
         case -2:
             goto error_parse;
         case -3:
             goto error_cookie;
         case -4:
             goto error_toobig;

So, I adjusted:

#define MAX_REPLY_SIZE

to several megabytes as well, and tried the same with MAX_BODY_SIZE too.

Now, when I run the dlg.list command, it just hangs and never returns anything. It was stuck there for well over 20 minutes. An 'strace' on sercmd reveals that it receives what appears to be the full listing, but keeps wanting to read() more. I don't have the exact output handy at the moment, but it looked like this:

socket(PF_FILE, SOCK_STREAM, 0)         = 3
connect(3, {sa_family=AF_FILE, path="/tmp/kamailio_ctl"}, 110) = 0
writev(3, [{"\241\3\v%s\230\4", 7}, {"\221\tdlg.list\0", 11}], 2) = 18
read(3, "\241\27\16\257%s\230\4\221Hhash:551:9521 state:4 "...,

786432. = 340000

read(3,
[just hangs here]

Now, I would have assumed that perhaps there is more to read and the output is not returning due to some endless locking of the dialog profile table, which is constantly changing. However, that cannot be the case because

kamctl fifo dlg_list

works fine for any amount of dialogs, and always returns all the data near-instantly!

Any assistance is much appreciated!

-- Alex

[1] I don't have the output handy at the moment, but it was a read() value: