Hello!
Please help me to find the issue with CDP module as it blocks Kamailio to start.

[root@10-10-10-10 kamailio]# cat diameter.xml
<?xml version="1.0" encoding="UTF-8"?>
<DiameterPeer
        FQDN="10-10-10-10.ams.proxy.dev"
        Realm="proxy.dev"
        Product_Name="Diameter Credit Control"
        Vendor_Id="10415"
        AcceptUnknownPeers="1"
        DropUnknownOnDisconnect="1"
        Tc="30"
        Workers="4"
        QueueLength="32">

        <Peer FQDN="dev-diameter-1.ams.proxy.dev" Realm="proxy.dev" port="3868"/>
        <Acceptor port="3868" bind="10.10.10.10"/>
        <Auth id="16777216" vendor="10415"/>
        <Acct id="16777216" vendor="0" />
        <Auth id="16777216" vendor="10415"/>
        <Auth id="16777216" vendor="0" />
        <SupportedVendor vendor="10415"/>
       <Realm name="proxy.dev">
                <Route FQDN="dev-diameter-1.ams.proxy.dev" metric="1"/>
        </Realm>
        <DefaultRoute FQDN="dev-diameter-1.ams.proxy.dev" metric="10"/>
</DiameterPeer>


38(7825) INFO: cdp [worker.c:332]: worker_process(): [1] Worker process started...
37(7824) INFO: cdp [worker.c:332]: worker_process(): [0] Worker process started...
39(7826) INFO: cdp [worker.c:332]: worker_process(): [2] Worker process started...
40(7827) INFO: cdp [worker.c:332]: worker_process(): [3] Worker process started...
41(7828) INFO: cdp [receiver.c:450]: receiver_process(): receiver_process(): [] Receiver process doing init on new process...
41(7828) INFO: cdp [receiver.c:455]: receiver_process(): receiver_process(): [] Receiver process starting up...
42(7829) INFO: cdp [receiver.c:450]: receiver_process(): receiver_process(): [dev-diameter-1.ams.proxy.dev] Receiver process doing init on new process...
42(7829) INFO: cdp [receiver.c:184]: add_serviced_peer(): add_serviced_peer(): Adding serviced_peer_t to receiver for peer [dev-diameter-1.ams.proxy.dev]
42(7829) INFO: cdp [receiver.c:455]: receiver_process(): receiver_process(): [dev-diameter-1.ams.proxy.dev] Receiver process starting up...
43(7830) INFO: cdp [acceptor.c:81]: acceptor_process(): Acceptor process starting up...
 0(7787) INFO: cdp [cdp_mod.c:244]: cdp_child_init(): ... CDiameterPeer child started
43(7830) WARNING: cdp [tcp_accept.c:121]: create_socket(): create_socket(): Trying to open/bind/listen on 10.10.10.10 port 3868
43(7830) WARNING: cdp [tcp_accept.c:146]: create_socket(): create_socket(): Successful socket open/bind/listen on 10.10.10.10 port 3868
43(7830) INFO: cdp [acceptor.c:95]: acceptor_process(): Acceptor opened sockets. Entering accept loop ...
44(7831) INFO: cdp [timer.c:205]: timer_process(): Timer process starting up...
[root@10-10-10-10 kamailio]# 44(7831) INFO: cdp [peerstatemachine.c:525]: I_Snd_Conn_Req(): I_Snd_Conn_Req(): Peer dev-diameter-1.ams.proxy.dev
44(7831) INFO: cdp [receiver.c:869]: peer_connect(): peer_connect(): Trying to connect to 10.10.10.20 port 3868
44(7831) INFO: cdp [receiver.c:937]: peer_connect(): peer_connect(): Peer dev-diameter-1.ams.proxy.dev:3868 connected
42(7829) ERROR: cdp [peerstatemachine.c:634]: I_Snd_CER(): I_Snd_CER(): Error on finding local host address > Socket operation on non-socket
42(7829) CRITICAL: <core> [core/mem/q_malloc.c:149]: qm_debug_check_frag(): BUG: qm: prev. fragm. tail overwritten(0, abcdefed)[0x7f3ecb7ef018:0x7f3ecb7ef050]! Memory allocator was called from cdp: diameter_avp.c:365. Fragment marked by cdp: diameter_avp.c:142. Exec from core/mem/q_malloc.c:504.
45(7832) CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 52
 0(7787) ALERT: <core> [main.c:739]: handle_sigs(): child process 7829 exited by a signal 6
 0(7787) ALERT: <core> [main.c:742]: handle_sigs(): core was generated
 0(7787) INFO: <core> [main.c:764]: handle_sigs(): terminating due to SIGCHLD

DNS record dev-diameter-1.ams.proxy.dev is pointed to 10.10.10.20

NU gdb (GDB) Red Hat Enterprise Linux 7.6.1-114.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
Reading symbols from /usr/sbin/kamailio...Reading symbols from /usr/lib/debug/usr/sbin/kamailio.debug...done.
done.
[New LWP 7829]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `kamailio -f kamailio.cfg -DDDD -E'.
Program terminated with signal 6, Aborted.
#0  0x00007f3ed7dc0207 in raise () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install glibc-2.17-260.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-34.el7.x86_64 libcom_err-1.42.9-13.el7.x86_64 libgcc-4.8.5-36.el7.x86_64 libselinux-2.5-14.1.el7.x86_64 libstdc++-4.8.5-36.el7.x86_64 libxml2-2.9.1-6.el7_2.3.x86_64 mariadb-libs-5.5.60-1.el7_5.x86_64 openssl-libs-1.0.2k-16.el7.x86_64 pcre-8.32-17.el7.x86_64 xz-libs-5.2.2-1.el7.x86_64 zlib-1.2.7-18.el7.x86_64
(gdb) bt
#0  0x00007f3ed7dc0207 in raise () from /lib64/libc.so.6
#1  0x00007f3ed7dc18f8 in abort () from /lib64/libc.so.6
#2  0x000000000067d5f7 in qm_debug_check_frag (qm=0x7f3ecb4d0000, f=0x7f3ecb7ef018, file=0x7f3ed068d932 "cdp: diameter_avp.c", line=365, efile=0x7df137 "core/mem/q_malloc.c", eline=504)
    at core/mem/q_malloc.c:151
#3  0x000000000068077a in qm_free (qmp=0x7f3ecb4d0000, p=0x7f3ecb7ef050, file=0x7f3ed068d932 "cdp: diameter_avp.c", func=0x7f3ed068f418 <__FUNCTION__.7016> "AAAFreeAVP", line=365, mname=0x7f3ed068d760 "cdp")
    at core/mem/q_malloc.c:504
#4  0x000000000068a2d6 in qm_shm_free (qmp=0x7f3ecb4d0000, p=0x7f3ecb7ef050, file=0x7f3ed068d932 "cdp: diameter_avp.c", func=0x7f3ed068f418 <__FUNCTION__.7016> "AAAFreeAVP", line=365,
    mname=0x7f3ed068d760 "cdp") at core/mem/q_malloc.c:1268
#5  0x00007f3ed06691c8 in AAAFreeAVP (avp=0x7ffd86bdd300) at diameter_avp.c:365
#6  0x00007f3ed0636d66 in AAAFreeAVPList (avpList=0x7f3ecb7eea40) at diameter_msg.c:396
#7  0x00007f3ed0637123 in AAAFreeMessage (msg=0x7ffd86bdd3b0) at diameter_msg.c:416
#8  0x00007f3ed06088ec in Process_CEA (p=0x7f3ecb7a00d8, cea=0x7f3ecb7ee9f0) at peerstatemachine.c:804
#9  0x00007f3ed0601ab1 in sm_process (p=0x7f3ecb7a00d8, event=I_Rcv_CEA, msg=0x7f3ecb7ee9f0, peer_locked=0, sock=8) at peerstatemachine.c:166
#10 0x00007f3ed0659825 in receive_message (msg=0x7f3ecb7ee9f0, sp=0x7f3ed76feec8) at receiver.c:1128
#11 0x00007f3ed064f295 in do_receive (sp=0x7f3ed76feec8) at receiver.c:593
#12 0x00007f3ed0653068 in receive_loop (original_peer=0x7f3ecb7a00d8) at receiver.c:800
#13 0x00007f3ed064c7c6 in receiver_process (p=0x7f3ecb7a00d8) at receiver.c:459
#14 0x00007f3ed05fd7de in diameter_peer_start (blocking=0) at diameter_peer.c:289
#15 0x00007f3ed05ef9b1 in cdp_child_init (rank=0) at cdp_mod.c:243
#16 0x0000000000544e31 in init_mod_child (m=0x7f3ed7630170, rank=0) at core/sr_module.c:943
#17 0x0000000000544ad3 in init_mod_child (m=0x7f3ed7630e90, rank=0) at core/sr_module.c:939
#18 0x0000000000544ad3 in init_mod_child (m=0x7f3ed7631290, rank=0) at core/sr_module.c:939
#19 0x0000000000544ad3 in init_mod_child (m=0x7f3ed7631700, rank=0) at core/sr_module.c:939
#20 0x0000000000545205 in init_child (rank=0) at core/sr_module.c:970
#21 0x0000000000424f85 in main_loop () at main.c:1701
#22 0x000000000042b87e in main (argc=5, argv=0x7ffd86bde218) at main.c:2638


(gdb) bt full
#0  0x00007f3ed7dc0207 in raise () from /lib64/libc.so.6
No symbol table info available.
#1  0x00007f3ed7dc18f8 in abort () from /lib64/libc.so.6
No symbol table info available.
#2  0x000000000067d5f7 in qm_debug_check_frag (qm=0x7f3ecb4d0000, f=0x7f3ecb7ef018, file=0x7f3ed068d932 "cdp: diameter_avp.c", line=365, efile=0x7df137 "core/mem/q_malloc.c", eline=504)
    at core/mem/q_malloc.c:151
        __FUNCTION__ = "qm_debug_check_frag"
#3  0x000000000068077a in qm_free (qmp=0x7f3ecb4d0000, p=0x7f3ecb7ef050, file=0x7f3ed068d932 "cdp: diameter_avp.c", func=0x7f3ed068f418 <__FUNCTION__.7016> "AAAFreeAVP", line=365, mname=0x7f3ed068d760 "cdp")
    at core/mem/q_malloc.c:504
        qm = 0x7f3ecb4d0000
        f = 0x7f3ecb7ef018
        size = 140726864040496
        next = 0x7df14b
        prev = 0x7f3ed067f329
        __FUNCTION__ = "qm_free"
#4  0x000000000068a2d6 in qm_shm_free (qmp=0x7f3ecb4d0000, p=0x7f3ecb7ef050, file=0x7f3ed068d932 "cdp: diameter_avp.c", func=0x7f3ed068f418 <__FUNCTION__.7016> "AAAFreeAVP", line=365,
    mname=0x7f3ed068d760 "cdp") at core/mem/q_malloc.c:1268
No locals.
#5  0x00007f3ed06691c8 in AAAFreeAVP (avp=0x7ffd86bdd300) at diameter_avp.c:365
        __FUNCTION__ = "AAAFreeAVP"
#6  0x00007f3ed0636d66 in AAAFreeAVPList (avpList=0x7f3ecb7eea40) at diameter_msg.c:396
        avp_t = 0x7f3ecb7ef050
        avp = 0x7f3ecb7eef40
#7  0x00007f3ed0637123 in AAAFreeMessage (msg=0x7ffd86bdd3b0) at diameter_msg.c:416
        __FUNCTION__ = "AAAFreeMessage"
#8  0x00007f3ed06088ec in Process_CEA (p=0x7f3ecb7a00d8, cea=0x7f3ecb7ee9f0) at peerstatemachine.c:804
        avp = 0x7f3ecb7ef440
#9  0x00007f3ed0601ab1 in sm_process (p=0x7f3ecb7a00d8, event=I_Rcv_CEA, msg=0x7f3ecb7ee9f0, peer_locked=0, sock=8) at peerstatemachine.c:166
        result_code = -798486160
        next_event = 32574
        msg_received = 0
        __FUNCTION__ = "sm_process"
#10 0x00007f3ed0659825 in receive_message (msg=0x7f3ecb7ee9f0, sp=0x7f3ed76feec8) at receiver.c:1128
        avp1 = 0xd0684fc0
        avp2 = 0x7f3ecb7eed10
        __FUNCTION__ = "receive_message"
#11 0x00007f3ed064f295 in do_receive (sp=0x7f3ed76feec8) at receiver.c:593
        cnt = 184
        n = 184
        version = 1
        dst = 0x7f3ecb7ef4f4 ""
        dmsg = 0x7f3ecb7ee9f0
        __FUNCTION__ = "do_receive"
#12 0x00007f3ed0653068 in receive_loop (original_peer=0x7f3ecb7a00d8) at receiver.c:800
        rfds = {__fds_bits = {256, 0 <repeats 15 times>}}
        efds = {__fds_bits = {0 <repeats 16 times>}}
        tv = {tv_sec = 0, tv_usec = 999998}
        n = 1
        max = 49
        cnt = 1
        msg = 0x0
        sp = 0x7f3ed76feec8
        sp2 = 0x7f3ed76feec8
        p = 0x7f3ecb7a00d8
        fd = 8
        fd_exchange_pipe_local = 49
        __FUNCTION__ = "receive_loop"
#13 0x00007f3ed064c7c6 in receiver_process (p=0x7f3ecb7a00d8) at receiver.c:459
---Type <return> to continue, or q <return> to quit---
        __FUNCTION__ = "receiver_process"
#14 0x00007f3ed05fd7de in diameter_peer_start (blocking=0) at diameter_peer.c:289
        pid = 0
        k = -1
        p = 0x7f3ecb7a00d8
        __FUNCTION__ = "diameter_peer_start"
#15 0x00007f3ed05ef9b1 in cdp_child_init (rank=0) at cdp_mod.c:243
        __FUNCTION__ = "cdp_child_init"
#16 0x0000000000544e31 in init_mod_child (m=0x7f3ed7630170, rank=0) at core/sr_module.c:943
        __FUNCTION__ = "init_mod_child"
#17 0x0000000000544ad3 in init_mod_child (m=0x7f3ed7630e90, rank=0) at core/sr_module.c:939
        __FUNCTION__ = "init_mod_child"
#18 0x0000000000544ad3 in init_mod_child (m=0x7f3ed7631290, rank=0) at core/sr_module.c:939
        __FUNCTION__ = "init_mod_child"
#19 0x0000000000544ad3 in init_mod_child (m=0x7f3ed7631700, rank=0) at core/sr_module.c:939
        __FUNCTION__ = "init_mod_child"
#20 0x0000000000545205 in init_child (rank=0) at core/sr_module.c:970
No locals.
#21 0x0000000000424f85 in main_loop () at main.c:1701
        i = 32
        pid = 7821
        si = 0x0
        si_desc = "udp receiver child=31 sock=10.10.10.10:5060\000\177\000\000`\336\275\206\375\177\000\000A\307g\000\000\000\000\000`\202A\000\000\000\000\000ȖP\313>\177", '\000' <repeats 14 times>, "\001\000\000\000\260\336\275\206\375\177\000\000\234\240h\000\000\000\000\000 \243w\000\000\000\000\000H\361m\327>\177\000"
        nrprocs = 32
        woneinit = 1
        __FUNCTION__ = "main_loop"
#22 0x000000000042b87e in main (argc=5, argv=0x7ffd86bde218) at main.c:2638
        cfg_stream = 0x2b13020
        c = -1
        r = 0
        tmp = 0x0
        tmp_len = 0
        port = 0
        proto = 0
        options = 0x758490 ":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:"
        ret = -1
        seed = 4201223303
        rfd = 4
        debug_save = 0
        debug_flag = 0
        dont_fork_cnt = 4
        n_lst = 0x0
        p = 0x0
        st = {st_dev = 19, st_ino = 82198, st_nlink = 2, st_mode = 16832, st_uid = 995, st_gid = 2, __pad0 = 0, st_rdev = 0, st_size = 60, st_blksize = 4096, st_blocks = 0, st_atim = {tv_sec = 1547739314,
            tv_nsec = 582000000}, st_mtim = {tv_sec = 1547743303, tv_nsec = 194148453}, st_ctim = {tv_sec = 1547743303, tv_nsec = 194148453}, __unused = {0, 0, 0}}
        __FUNCTION__ = "main"
(gdb)



-- 

BR,
Denys Pozniak