<h3>Description</h3>
<pre><code>Kamailio crashes out with message: CRITICAL: <core> [pass_fd.c:277]: receive_fd(): EOF on 30
</code></pre>
<h3>Troubleshooting</h3>
<h4>Reproduction</h4>
<p>Happens sporadicly. Some times 6 times in a day. Some times it won't happen for a week. But on average it probably happens once per day.</p>
<h4>Debugging Data</h4>
<pre><code>Reading symbols from /usr/local/sbin/kamailio...done.
[New LWP 29579]
[New LWP 9469]
[New LWP 29581]
Missing separate debuginfo for /usr/lib64/libpq.so.5
Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/00/595f0be1374285c79ea1d4cdcee72682108fab.debug
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Missing separate debuginfo for /usr/lib64/libstdc++.so.6
Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/43/4c339faa62ca4e59eb71572a60967fe54a69ad.debug
Missing separate debuginfo for /lib64/libgcc_s.so.1
Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/3f/d5f89de59e124ab1419a0bd16775b4096e84fd.debug
Core was generated by `/usr/local/sbin/kamailio -P /var/run/kamailio.pid -m 256 -M 8 -u kamailio -g ka'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007fc9a9350521 in _int_malloc () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install cyrus-sasl-lib-2.1.23-13.16.amzn1.x86_64 glibc-2.17-106.168.amzn1.x86_64 keyutils-libs-1.5.8-3.12.amzn1.x86_64 krb5-libs-1.13.2-12.40.amzn1.x86_64 libcom_err-1.42.12-4.40.amzn1.x86_64 libcurl-7.47.1-9.68.amzn1.x86_64 libevent-2.0.21-4.19.amzn1.x86_64 libicu-50.1.2-11.12.amzn1.x86_64 libidn-1.18-2.8.amzn1.x86_64 libpsl-0.6.2-1.2.amzn1.x86_64 libselinux-2.1.10-3.22.amzn1.x86_64 libssh2-1.4.2-2.13.amzn1.x86_64 libxml2-2.9.1-6.3.49.amzn1.x86_64 nspr-4.11.0-1.37.amzn1.x86_64 nss-3.21.3-2.77.amzn1.x86_64 nss-softokn-freebl-3.16.2.3-14.4.39.amzn1.x86_64 nss-util-3.21.3-1.1.51.amzn1.x86_64 openldap-2.4.40-12.29.amzn1.x86_64 openssl-1.0.1k-15.96.amzn1.x86_64 xz-libs-5.1.2-12alpha.12.amzn1.x86_64 zlib-1.2.8-7.18.amzn1.x86_64

(gdb) bt full
#0  0x00007fc9a9350521 in _int_malloc () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007fc9a935226c in malloc () from /lib64/libc.so.6
No symbol table info available.
#2  0x00007fc9a9ac45d5 in _dl_scope_free () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#3  0x00007fc9a9abf691 in _dl_map_object_deps () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#4  0x00007fc9a9ac589b in dl_open_worker () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#5  0x00007fc9a9ac11b4 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#6  0x00007fc9a9ac51ab in _dl_open () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#7  0x00007fc9a94034d2 in do_dlopen () from /lib64/libc.so.6
No symbol table info available.
#8  0x00007fc9a9ac11b4 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
No symbol table info available.
#9  0x00007fc9a9403592 in __libc_dlopen_mode () from /lib64/libc.so.6
No symbol table info available.
#10 0x00007fc9a93dcac5 in init () from /lib64/libc.so.6
No symbol table info available.
#11 0x00007fc9a6c1bbb0 in pthread_once () from /lib64/libpthread.so.0
No symbol table info available.
#12 0x00007fc9a93dcbdc in backtrace () from /lib64/libc.so.6
No symbol table info available.
#13 0x00007fc9a9347344 in __libc_message () from /lib64/libc.so.6
No symbol table info available.
#14 0x00007fc9a934f053 in _int_free () from /lib64/libc.so.6
No symbol table info available.
#15 0x00007fc9a933cff5 in fclose@@GLIBC_2.2.5 () from /lib64/libc.so.6
No symbol table info available.
#16 0x00007fc9a88c29bf in _nss_files_gethostbyname4_r () from /lib64/libnss_files.so.2
No symbol table info available.
#17 0x00007fc9a93aebb8 in gaih_inet () from /lib64/libc.so.6
No symbol table info available.
#18 0x00007fc9a93b227d in getaddrinfo () from /lib64/libc.so.6
No symbol table info available.
#19 0x00007fc99f7c86e4 in ?? () from /usr/lib64/libcurl.so.4
No symbol table info available.
#20 0x00007fc99f7d2efa in ?? () from /usr/lib64/libcurl.so.4
No symbol table info available.
#21 0x00007fc99f7d099b in ?? () from /usr/lib64/libcurl.so.4
No symbol table info available.
#22 0x00007fc9a6c16dc5 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#23 0x00007fc9a93c8c9d in clone () from /lib64/libc.so.6
No symbol table info available.

(gdb) info locals
No symbol table info available.

(gdb) list
1834            int proto;
1835            char *options;
1836            int ret;
1837            unsigned int seed;
1838            int rfd;
1839            int debug_save, debug_flag;
1840            int dont_fork_cnt;
1841            struct name_lst* n_lst;
1842            char *p;
1843            struct stat st = {0};
(gdb)
</code></pre>
<h4>Log Messages</h4>
<pre><code>Aug  7 22:43:30 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: <core> [receive.c:173]: receive_msg(): core parsing of SIP message failed (67.191.157.42:5060/1)
Aug  7 22:43:31 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event as-feature-event
Aug  7 22:43:32 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:32 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:32 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event missed-call-summary
Aug  7 22:43:36 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:36 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:37 ip-172-31-46-236 /usr/local/sbin/kamailio[9450]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event as-feature-event
Aug  7 22:43:38 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event as-feature-event
Aug  7 22:43:40 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:40 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:44 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:44 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:47 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: ERROR: <core> [receive.c:173]: receive_msg(): core parsing of SIP message failed (67.191.157.42:5060/1)
Aug  7 22:43:48 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:48 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:50 ip-172-31-46-236 /usr/local/sbin/kamailio[9450]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event call-info
Aug  7 22:43:52 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event as-feature-event
Aug  7 22:43:52 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:52 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:52 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event as-feature-event
Aug  7 22:43:52 ip-172-31-46-236 /usr/local/sbin/kamailio[9450]: NOTICE: presence [subscribe.c:1291]: handle_subscribe(): Unsupported presence event missed-call-summary
Aug  7 22:43:56 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:43:56 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:43:57 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: <core> [receive.c:173]: receive_msg(): core parsing of SIP message failed (67.191.157.42:5060/1)
Aug  7 22:44:00 ip-172-31-46-236 /usr/local/sbin/kamailio[9450]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:44:00 ip-172-31-46-236 /usr/local/sbin/kamailio[9450]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:44:00 ip-172-31-46-236 /usr/local/sbin/kamailio[9450]: ERROR: <core> [receive.c:173]: receive_msg(): core parsing of SIP message failed (67.191.157.42:5060/1)
Aug  7 22:44:09 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:44:09 ip-172-31-46-236 /usr/local/sbin/kamailio[9449]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:44:10 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:44:10 ip-172-31-46-236 /usr/local/sbin/kamailio[9452]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:44:11 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: ERROR: maxfwd [mf_funcs.c:62]: is_maxfwd_present(): parsing MAX_FORWARD header failed!
Aug  7 22:44:11 ip-172-31-46-236 /usr/local/sbin/kamailio[9451]: ERROR: <core> [msg_translator.c:2330]: build_res_buf_from_sip_req(): alas, parse_headers failed
Aug  7 22:44:11 ip-172-31-46-236 /usr/local/sbin/kamailio[9477]: CRITICAL: <core> [pass_fd.c:277]: receive_fd(): EOF on 30
</code></pre>
<h4>SIP Traffic</h4>
<p>N/A</p>
<h3>Possible Solutions</h3>
<p>N/A</p>
<h3>Additional Information</h3>
<ul>
<li><strong>Kamailio Version</strong> - output of <code>kamailio -v</code></li>
</ul>
<pre><code>version: kamailio 4.4.6 (x86_64/linux) 4d49b3
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: 4d49b3
compiled on 11:39:53 Jul 29 2017 with gcc 4.8.3
</code></pre>
<ul>
<li><strong>Operating System</strong>:</li>
</ul>

<pre><code>Linux ip-172-31-46-236 4.4.41-36.55.amzn1.x86_64 #1 SMP Wed Jan 18 01:03:26 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

It's Amazons Linux Distribution. I believe it's CentOS based.
</code></pre>

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