<p></p>

<h3 dir="auto">Description</h3>
<p dir="auto">Usage of <code>modparam("presence", "publ_cache", 2)</code> causes kamailio to crash shortly after starting up. This only happens when subscribe traffic is high (400 requests per second avg).</p>
<h3 dir="auto">Troubleshooting</h3>
<h4 dir="auto">Reproduction</h4>
<p dir="auto">The issue can be reproduced by starting up kamailio with the option above enabled and ~400 subscribe requests per second. The crash happens ~20 seconds after startup.</p>
<h4 dir="auto">Debugging Data</h4>

<pre><code>(paste your debugging data here)
</code></pre>
<h4 dir="auto">Log Messages</h4>

<pre><code>kernel: kamailio[25401]: segfault at 0 ip 00007f4a0a22d4d7 sp 00007fff6064a370 error 4 in presence.so[7f4a0a21e000+fe000]
</code></pre>
<h4 dir="auto">SIP Traffic</h4>

<pre><code>(paste your sip traffic here)
</code></pre>
<h3 dir="auto">Possible Solutions</h3>
<p dir="auto">Running with the default</p>
<h3 dir="auto">Additional Information</h3>
<ul dir="auto">
<li><strong>Kamailio Version</strong> - output of <code>kamailio -v</code></li>
</ul>
<pre><code>(paste your output here)
</code></pre>
<ul dir="auto">
<li><strong>Operating System</strong>:</li>
</ul>

<pre><code>Linux hostName 2.6.32-754.11.1.el6.x86_64 #1 SMP Tue Feb 26 15:38:56 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

version: kamailio 5.4.3 (x86_64/linux) e19ae3
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, 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_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: e19ae3 
compiled on 18:24:43 Dec 14 2020 with gcc 4.4.7
</code></pre>
<p dir="auto">I realize this is an older version so if it's resolved in a newer one let me know.</p>

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