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<p>Can anyone help me on below error. looks like core dump is happening and child is getting restarted. This is happening recently without any change to the VCL and any system configuration.</p>
<p>During this time the requests are getting terminated abruptly.</p>
<p>Thanks in advance.</p>
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<p>Varnish version - <span>varnish-4.0.2</span><br>
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<div>Jun 24 23:49:30 Prod-CACHE2 abrt[32341]: Saved core dump of pid 26526 (/product/varnish/sbin/varnishd) to /var/spool/abrt/ccpp-2016-06-24-23:48:19-26526 (9034817536 bytes)<br>
Jun 24 23:49:30 Prod-CACHE2 abrtd: Directory 'ccpp-2016-06-24-23:48:19-26526' creation detected<br>
Jun 24 23:49:31 Prod-CACHE2 abrtd: Executable '/product/varnish/sbin/varnishd' doesn't belong to any package and ProcessUnpackaged is set to 'no'<br>
Jun 24 23:49:31 Prod-CACHE2 abrtd: 'post-create' on '/var/spool/abrt/ccpp-2016-06-24-23:48:19-26526' exited with 1<br>
Jun 24 23:49:31 Prod-CACHE2 abrtd: Deleting problem directory '/var/spool/abrt/ccpp-2016-06-24-23:48:19-26526'<br>
Jun 24 23:49:31 Prod-CACHE2 varnishd[26524]: Child (26526) not responding to CLI, killing it.<br>
Jun 24 23:49:31 Prod-CACHE2 varnishd[26524]: Child (26526) not responding to CLI, killing it.<br>
Jun 24 23:49:31 Prod-CACHE2 varnishd[26524]: Child (26526) died signal=6 (core dumped)<br>
Jun 24 23:49:31 Prod-CACHE2 varnishd[26524]: Child (26526) Panic message:#012Assert error in cnt_lookup(), cache/cache_req_fsm.c line 430:#012 Condition((oc->exp_flags & (1<<7)) == 0) not true.#012thread = (cache-worker)#012ident = Linux,2.6.32-431.11.2.el6.x86_64,x86_64,-smalloc,-smalloc,-hcritbit,epoll#012Backtrace:#012
0x4310e5: pan_ic+0xc5#012 0x434c30: cnt_purge+0x0#012 0x436461: CNT_Request+0x241#012 0x42b73b: HTTP1_Session+0x53b#012 0x439f98: ses_req_pool_task+0x68#012 0x43a6d4: SES_pool_accept_task+0x2a4#012 0x433b87: Pool_Work_Thread+0x357#012 0x4467d9: wrk_thread_real+0xb9#012
0x3c25e079d1: /lib64/libpthread.so.0() [0x3c25e079d1]#012 0x3c25ae8b6d: /lib64/libc.so.6(clone+0x6d) [0x3c25ae8b6d]#012req = 0x7f83baaf2cb0 {#012 sp = 0x7f84dd71c430, vxid = 1108394165, step = R_STP_LOOKUP,#012 req_body = R_BODY_NONE,#012 restarts = 0,
esi_level = 0#012 sp = 0x7f84dd71c430 {#012 fd = 64, vxid = 34652201,#012 client = 10.254.9.78 61217,#012 step = S_STP_WORKING,#012 },#012 worker = 0x7f8574c0cc40 {#012 ws = 0x7f8574c0ce58 {#012 id = "wrk",#012 {s,f,r,e} = {0x7f8574c0ac30,0x7f8574c0ac30,(nil),+8192},#012
},#012 VCL::method = 0x0,#012 VCL::return = deliver,#012 },#012 ws = 0x7f83baaf2e48 {#012 id = "req",#012 {s,f,r,e} = {0x7f83baaf4ca0,+1320,(nil),+57360},#012 },#012 http[req] = {#012 ws = 0x7f83baaf2e48[req]#012 "GET",#012 "/search-engine-web/SearchContents?action=SearchContents&moreFilters=series%3A3197&appVersion=5.2.2&query=*&startIndex=0&searchOrder=counter_week%20desc&maxResult=8&channel=ANDROID&type=CLIPS",#012
"HTTP/1.1",#012 "host: xxx.xxx.com",#012 "Accept-Encoding: gzip",#012 "Akamai-Origin-Hop: 4",#012 "True-Client-IP: 49.15.204.238",#012 "User-Agent: Dalvik/2.1.0 (Linux; U; Android 5.1; 1201 Build/LMY47I)",#012 "Via: 1.1 v1-akamaitech.net(ghost)
(AkamaiGHost), 1.1 v1-akamaitech.net(ghost) (AkamaiGHost), 1.1 v1-akamaitech.net(ghost) (AkamaiGHost), 1.1 akamai.net(ghost) (AkamaiGHost)",#012 "X-Aka<br>
Jun 24 23:49:31 Prod-SEARCH-CACHE2 varnishd[26524]: child (1277) Started<br>
Jun 24 23:49:31 Prod-SEARCH-CACHE2 varnishd[26524]: Child (1277) said Child starts<br>
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<p>Thanks,</p>
<p>Mahesh.<br>
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