11 Jul
2018
11 Jul
'18
9:08 p.m.
### Description
Since we upgraded from v5.0.2 to v5.1.4 we are seeing spikes in our monitoring platform
regarding current active and early dialogs.
Every 10s we gather metrics using Kamailio's HTTP server:
```
# Statistics endpoint
if ($hu =~ "^/statistics") {
jsonrpc_exec('{"jsonrpc": "2.0","method":
"stats.get_statistics","params": ["all"],"id":
1}');
xhttp_reply("200", "OK", "application/json",
"$jsonrpl(body)");
exit;
}
```
stats.get_statistics has lots of metrics, the problematic ones we have found are:
```
"dialog.active_dialogs": "84",
"dialog.early_dialogs": "16",
```
The issue is that randomly, instead of reporting the real active/early dialogs, it will
return **9223372036854776000**.
Example:
```
...
"dialog.active_dialogs": "77",
"dialog.early_dialogs": "9223372036854776000",
...
...
"dialog.active_dialogs": "9223372036854776000",
"dialog.early_dialogs": "20",
...
...
"dialog.active_dialogs": "83",
"dialog.early_dialogs": "18",
...
```
### Troubleshooting
I added logging for kamailio to print the value for active-dialogs just to make sure it
wasn't a problem further down in the pipeline, and I could see that same number, so
it's definitely coming from Kamailio. Also, on version v5.0.2 installed from deb repo
this did not happen.
#### Reproduction
I cannot reproduce on purpose, I see it happen several times a day though.
#### Debugging
Please let me know what I can provide to troubleshoot this, I don't know where to
start, I'm concerned of activating debug logs in prod and waiting for this to happen
might overload the system, any alternatives?
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
# kamailio -v
version: kamailio 5.1.4 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC,
DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024,
BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 6.3.0
```
* **Operating System**:
```
OS: Debian stretch 9.4
Kernel: Linux kamailio 4.9.0-6-amd64 #1 SMP Debian 4.9.88-1+deb9u1 (2018-05-07) x86_64
GNU/Linux
```
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https://github.com/kamailio/kamailio/issues/1591