[sr-dev] [kamailio/kamailio] Segmentation fault occured in rpc_mod_print function in runtime. (#2460)

[Andrey Deykunov]

Hi Daniel,

I've performed some load tests. The loading was about 400 calls per second on peak. In parallel, I started a script calling commands below with a frequency of 200 milliseconds:

```
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 stats.get_statistics websocket:
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 stats.get_statistics tcp:
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 stats.get_statistics shmem:
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 mod.stats tls pkg
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 mod.stats tls shm
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 mod.stats websocket pkg
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 mod.stats websocket shm
    /var/lib/ums/sbin/kamcmd -s udp:localhost:2048 mod.stats core shm

```

This is a graph of loading:

![load_400_max](https://user-images.githubusercontent.com/9265562/95750045-3dbf0c80-0ca5-11eb-9dfa-e503526ecd62.png)

The tests have finished successfully, there were no any fails ocurred.

Andrey








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