[kamailio/kamailio] Problem with process limit of count wtimer secondary process (#1237)
15 Sep
2017
15 Sep
'17
8:55 p.m.
### Description
Kamailio won't start after pulling from master
Commit triggering the problem
```
git show ec15b23f25ba2502a661157ae69b4dc1db923f66
Author: Daniel-Constantin Mierla <miconda(a)gmail.com>
Date: Fri Sep 1 12:00:06 2017 +0200
core: main - don't count wtimer secondary process separately
- it is registered via sr_wtimer_init()
- fixes the extra empty entry in process table reported by Juha Heinanen
```
#### Reproduction
Always with specific configuration (I can diagnose further is needed)
#### Log Messages
When trying to start Kamailio
```
0(26583) CRITICAL: <core> [core/pt.c:285]: fork_process(): Process limit of 13
exceeded. Will simulate fork fail.
0(26583) CRITICAL: <core> [main.c:1720]: main_loop(): cannot fork tcp main process:
Invalid argument
```
### Possible Solutions
Not sure is the config I am using is not supported or if Kamailio code should be fixed.
rolling back the commit is fixing the issue
`git revert ec15b23f25ba2502a661157ae69b4dc1db923f66`
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17 Sep
17 Sep
10:13 a.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
Can you list here the names of the modules you loaded in your config? Likely there is one
that creates/forks an extra process, but it doesn't declare it.
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22 Sep
22 Sep
11:11 a.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
@jchavanton -- were you able to look more into this one as per my previous comment?
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28 Sep
28 Sep
5:50 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
sorry for the delay, I was thinking I would receive an email notification
14 processes
```
/ # ps | grep kamailio
7 root 0:03 /usr/sbin/kamailio
24 root 0:00 /usr/sbin/kamailio
25 root 0:00 /usr/sbin/kamailio
26 root 0:00 /usr/sbin/kamailio
27 root 0:00 /usr/sbin/kamailio
28 root 0:00 /usr/sbin/kamailio
29 root 0:00 /usr/sbin/kamailio
30 root 0:00 /usr/sbin/kamailio
31 root 0:00 /usr/sbin/kamailio
32 root 0:00 /usr/sbin/kamailio
33 root 0:00 /usr/sbin/kamailio
34 root 0:00 /usr/sbin/kamailio
35 root 0:00 /usr/sbin/kamailio
36 root 0:00 /usr/sbin/kamailio
```
```
/ # kamcmd ps
7 main process - attendant
24 udp receiver child=0 sock=117.75.69.33:5060
25 udp receiver child=0 sock=117.75.69.33:5160
26 slow timer
27 timer
28 secondary timer
29 JSONRPC-S FIFO
30 JSONRPC-S DATAGRAM
31 ctl handler
32 RTIMER EXEC child=0 timer=tmetrics
33 HTable Timer
34 Dialog Clean Timer
35 tcp receiver (generic) child=0
36 tcp main process
```
If you do not find the answer spontaneously, I will troubleshoot it further
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5:56 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
This is on Linux Alpine in docker
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29 Sep
29 Sep
10:33 a.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
I asked for the list of kamailio modules you load in config.
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5:25 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
```
loadmodule "db_flatstore"
loadmodule "acc"
loadmodule "kex"
loadmodule "jsonrpcs"
loadmodule "mi_fifo"
loadmodule "mi_rpc"
loadmodule "ctl"
loadmodule "tm"
loadmodule "tmx"
loadmodule "sl"
loadmodule "diversion"
loadmodule "rr"
loadmodule "db_postgres"
loadmodule "db_sqlite"
loadmodule "pv"
loadmodule "avpops"
loadmodule "maxfwd"
loadmodule "textops"
loadmodule "siputils"
loadmodule "xlog"
loadmodule "permissions"
loadmodule "dispatcher"
loadmodule "sanity"
loadmodule "auth"
loadmodule "statistics"
loadmodule "cfgutils"
loadmodule "uac_redirect"
loadmodule "statsd"
loadmodule "sqlops"
loadmodule "rtimer"
loadmodule "htable"
loadmodule "mqueue"
loadmodule "http_client"
loadmodule "app_lua"
loadmodule "xhttp"
loadmodule "jsonrpc-s"
loadmodule "ipops"
loadmodule "sqlops"
loadmodule "cfgutils"
loadmodule "statsd"
loadmodule "path"
loadmodule "textopsx"
loadmodule "nathelper"
loadmodule "uac"
loadmodule "dialog"
loadmodule "pike"
loadmodule "ratelimit"
loadmodule "xmlrpc"
loadmodule "ndb_redis"
loadmodule "topos"
loadmodule "topos_redis"
loadmodule "tm"
loadmodule "statsd"
```
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6:27 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
I thought that since `kamcmd ps` was matching the amount of Kamailio running processes we
could be able to find why the count was not matching, in this
For the last test I lowered the amount of childs
```
0(21919) CRITICAL: <core> [core/pt.c:285]: fork_process(): Process limit of 13
exceeded. Will simulate fork fail.
```
As seen above there is 14 processes when the server is starting properly, I concluded that
is must be one of the following :
```
/ # kamcmd ps
7 main process - attendant
24 udp receiver child=0 sock=117.75.69.33:5060
25 udp receiver child=0 sock=117.75.69.33:5160
26 slow timer
27 timer
28 secondary timer
29 JSONRPC-S FIFO
30 JSONRPC-S DATAGRAM
31 ctl handler
32 RTIMER EXEC child=0 timer=tmetrics
33 HTable Timer
34 Dialog Clean Timer
35 tcp receiver (generic) child=0
36 tcp main process
```
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6:35 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
found it !
`modparam("htable", "timer_procs", 0)` # problem when set to 1
```
if(rank==PROC_MAIN) {
if(ht_timer_procs>0) {
for(i=0; i<ht_timer_procs; i++) {
if(fork_sync_timer(PROC_TIMER, "HTable Timer", 1 /*socks
flag*/,
ht_timer, (void*)(long)i, ht_timer_interval)<0)
{
LM_ERR("failed to start timer routine as
process\n");
return -1; /* error */
}
}
}
}
```
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7:02 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
Good catch, thanks for troubleshooting. The issue happened when asking for an extra clean
up timer for hash tables but no hash table was defined with auto-expire (so the extra
timer was not needed). Hopefully it is fixed with the patch referenced above.
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7:10 p.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
I see, kind of a miss config in the end, thanks for the fix
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30 Sep
30 Sep
8:49 a.m.
New subject: [kamailio/kamailio] Problem with process limit at startup (#1237)
Closed #1237.
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2424
days inactive
2439
days old
11 comments
2 participants
participants (2)
-
Daniel-Constantin Mierla -
Julien Chavanton