Unfortunately we've found a problem with the sort function.
On my varnish, after the change to regfilter and sort the URL, syslog started to log this:
Mar 23 18:40:48 ca-site-cache-6423 varnishd[2957]: Child (11361) Last panic at: Wed, 23 Mar 2016 21:40:48 GMT#012"Assert error in child_sigsegv_handler(), mgt/mgt_child.c line 282:#012 Condition(Segmentation fault by instruction at (nil)) not true.#012thread = (cache-worker)#012version = varnish-4.1.2 revision 0d7404e#012ident = Linux,4.1.13-19.30.amzn1.x86_64,x86_64,-junix,-sfile,-smalloc,-hcritbit,epoll#012Backtrace:#012 0x432d03: varnishd() [0x432d03]#012 0x452659: varnishd() [0x452659]#012 0x7f13bf64f100: libpthread.so.0(+0xf100) [0x7f13bf64f100]#012 0x7f13b1dfadef: libvmod_querystring.so(vmod_sort+0x2ef) [0x7f13b1dfadef]#012 0x7f13b6484242: vgc.so(VGC_function_vcl_recv+0x62) [0x7f13b6484242]#012 0x43f274: varnishd() [0x43f274]#012 0x43f63a: varnishd(VCL_recv_method+0x5a) [0x43f63a]#012 0x437496: varnishd(CNT_Request+0x7a6) [0x437496]#012 0x44e27b: varnishd(HTTP1_Session+0x11b) [0x44e27b]#012 0x43a22d: varnishd(SES_Proto_Req+0x5d) [0x43a22d]#012req = 0x7f13bea51020 {#012 vxid = 557057, step = R_STP_RECV,#012 req_body = R_BODY_NONE,#012 restarts = 0, esi_level = 0,#012 sp = 0x7f13b712d420 {#012 fd = 20, vxid = 1,#012 client = 10.2.5.120 59583,#012 step = S_STP_H1PROC,#012 },#012 worker = 0x7f13c0c9fc00 {#012 stack = {0x7f13c0ca0000 -> 0x7f13c0c94000},#012 ws = 0x7f13c0c9fdf8 {#012 id = \"wrk\",#012 {s,f,r,e} = {0x7f13c0c9f3c0,0x7f13c0c9f3c0,(nil),+2040},#012 },#012 VCL::method = inside RECV,#012 VCL::return = abandon,#012 VCL::methods = {RECV},#012 },#012 ws = 0x7f13bea51200 {#012 id = \"req\",#012 {s,f,r,e} = {0x7f13bea53000,+3040,+57336,+57336},#012 },#012 http_conn = 0x7f13bea51128 {#012 fd = 20,#012 doclose = NULL,#012 ws = 0x7f13bea51200,#012 {rxbuf_b, rxbuf_e} = {0x7f13bea53000, 0x7f13bea538da},#012 {pipeline_b, pipeline_e} = {(nil), (nil)},#012 content_length = -1,#012 body_status = none,#012 first_byte_timeout = 0.000000,#012 between_bytes_timeout = 0.000000,#012 },#012 http[req] = 0x7f13bea51298 {#012 ws[req] = 0x7f13bea51200,#012 hdrs {#012 \"GET\",#012 \"/vivacorretor/wp-admin/admin-ajax.php?callback=po_data&orig_request_uri=%2Fvivacorretor%2Fmelhores-horarios-de-postagem-da-sua-pagina-no-facebook%2F&action=inc_popup&do=get_data&thefrom=%2Fkoobecaf-on-anigap-aus-ad-megatsop-ed-soiraroh-serohlem%2Froterrocaviv%2Frb.moc.laeraviv.www%2F%2F%3Aptth&thereferrer=%2Fmoc.gnib.www%2F%2F%3Asptth&_=1458769246888\",#012 \"HTTP/1.1\",#012 \"host: www.vivareal.com.br\",#012 \"Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01\",#012 \"Accept-Encoding: gzip, deflate\",#012 \"Accept-Language: pt-BR,pt;q=0.5\",#012 \"Cookie: optimizelyEndUserId=oeu1453926388295r0.7119827927739377; optOutCookie=true; zanox_cookie=other; vivareal_ranking=0; PHPSESSID=h9a2jrdtkboja9bd1jodacebc5; VR_COUNT_ACCESS=91; _ga=GA1.3.1837013940.1453926389; new_vivareal_user_id=6ac1f2c2a2f4e5bf2bb5f3d4829af6ef; vivareal_ranking=0; localytics.js=1; __ll_websdk_csi=14; __ll_websdk_cst=1456886438; __ll_websdk_csu=%22e7f6b30c-da7e-ddc7-f183-9fb4cbaa2cce%22; __ll_websdk_lot=1456886438; __ll_websdk_cd={%220%22:%22Generic%22}; __ll_websdk_lct=1456886703785; __ll_websdk_pa=1453926402; __ll_websdk_csq=518; __ll_websdk_iu=%22b02b4bcb-c2b6-31d1-8e76-848da33631a8%22; __ll_websdk_ids={%22customer_id%22:%226ac1f2c2a2f4e5bf2bb5f3d4829af6ef%22}; __ll_websdk_fl=[%22Search%20Results%22]; __gads=ID=4570b7d6e270b8bb:T=1453926404:S=ALNI_MZnxPmBcpJ7nIZQVwT_AhlsbtG30w; _VR_COOKIE=RmVsaXBlJTIwUGluaGVpcm86ZmVsaXBlLnJhaXpjaWRhZGFuaXN0YUBnbWFpbC5jb206MTE5OTcxMTM1OTE; VR_SIMILAR_OPT_OUT=false; optimizelySegments=%7B%22231107883%22%3A%22false%22%2C%22231408497%22%3A%22edge%22%2C%22231453599%22%3A%22campaign%22%2C%224404411069%22%3A%22none%22%7D; optimizelyBuckets=%7B%224973150094%22%3A%220%22%7D; _ceg.s=o4ff07; _ceg.u=o4ff07; _spl_pv=10; sb_client=56d48439725bce5f86778d69; sb_customer=55s62f809dfdfc9ee4762c5bbb2c2ec1d99hf7dc72c418ec7f21769e4t23fbe3a3e677\",#012 \"Referer: http://www.vivareal.com.br/vivacorretor/melhores-horarios-de-postagem-da-sua-pagina-no-facebook/\",#012 \"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586\",#012 \"X-Requested-With: XMLHttpRequest\",#012 \"X-Forwarded-Port: 80\",#012 \"X-Forwarded-Proto: http\",#012 \"Connection: keep-alive\",#012 \"X-Forwarded-For: 187.113.154.125, 10.2.5.120\",#012 },#012 },#012 vcl = {#012 temp = warm#012 srcname = {#012 \"/etc/varnish/site.vcl\",#012 \"Builtin\",#012 \"/etc/varnish/devicedetect.vcl\",#012 },#012 },#012 flags = {#012 },#012},#012#012"
Mar 23 18:40:49 ca-site-cache-6423 varnishd[2957]: Child (11923) said Child starts
Mar 23 18:40:49 ca-site-cache-6423 varnishd[2957]: Child (11923) said SMF.s0 mmap'ed 27917287424 bytes of 27917287424
Mar 23 18:40:53 ca-site-cache-6423 varnishd[2957]: Child (11923) died signal=6
Mar 23 18:40:53 ca-site-cache-6423 varnishd[2957]: Child (11923) Last panic at: Wed, 23 Mar 2016 21:40:53 GMT#012"Assert error in child_sigsegv_handler(), mgt/mgt_child.c line 282:#012 Condition(Segmentation fault by instruction at (nil)) not true.#012thread = (cache-worker)#012version = varnish-4.1.2 revision 0d7404e#012ident = Linux,4.1.13-19.30.amzn1.x86_64,x86_64,-junix,-sfile,-smalloc,-hcritbit,epoll#012Backtrace:#012 0x432d03: varnishd() [0x432d03]#012 0x452659: varnishd() [0x452659]#012 0x7f13bf64f100: libpthread.so.0(+0xf100) [0x7f13bf64f100]#012 0x7f13b25fbdef: libvmod_querystring.so(vmod_sort+0x2ef) [0x7f13b25fbdef]#012 0x7f13b6484242: vgc.so(VGC_function_vcl_recv+0x62) [0x7f13b6484242]#012 0x43f274: varnishd() [0x43f274]#012 0x43f63a: varnishd(VCL_recv_method+0x5a) [0x43f63a]#012 0x437496: varnishd(CNT_Request+0x7a6) [0x437496]#012 0x44e27b: varnishd(HTTP1_Session+0x11b) [0x44e27b]#012 0x43a22d: varnishd(SES_Proto_Req+0x5d) [0x43a22d]#012req = 0x7f13b60d1020 {#012 vxid = 196627, step = R_STP_RECV,#012 req_body = R_BODY_NONE,#012 restarts = 0, esi_level = 0,#012 sp = 0x7f13b3820420 {#012 fd = 22, vxid = 32769,#012 client = 10.2.5.120 59671,#012 step = S_STP_H1PROC,#012 },#012 worker = 0x7f13b66b9c00 {#012 stack = {0x7f13b66ba000 -> 0x7f13b66ae000},#012 ws = 0x7f13b66b9df8 {#012 id = \"wrk\",#012 {s,f,r,e} = {0x7f13b66b93c0,0x7f13b66b93c0,(nil),+2040},#012 },#012 VCL::method = inside RECV,#012 VCL::return = abandon,#012 VCL::methods = {RECV},#012 },#012 ws = 0x7f13b60d1200 {#012 id = \"req\",#012 {s,f,r,e} = {0x7f13b60d3000,+2600,+57336,+57336},#012 },#012 http_conn = 0x7f13b60d1128 {#012 fd = 22,#012 doclose = NULL,#012 ws = 0x7f13b60d1200,#012 {rxbuf_b, rxbuf_e} = {0x7f13b60d3000, 0x7f13b60d351e},#012 {pipeline_b, pipeline_e} = {(nil), (nil)},#012 content_length = -1,#012 body_status = none,#012 first_byte_timeout = 0.000000,#012 between_bytes_timeout = 0.000000,#012 },#012 http[req] = 0x7f13b60d1298 {#012 ws[req] = 0x7f13b60d1200,#012 hdrs {#012 \"GET\",#012 \"/vivacorretor/wp-admin/admin-ajax.php?callback=po_data&orig_request_uri=%2Fvivacorretor%2Fdicasvaliosasparacorretoresdeimoveisiniciantes%2F&action=inc_popup&do=get_data&thefrom=%2Fsetnaicinisievomiedseroterrocarapsasoilavsacid%2Froterrocaviv%2Frb.moc.laeraviv.www%2F%2F%3Aptth&thereferrer=QA3H_Hwyn2py2GIVqeGTLsgJJftFNCjQFA%3Dgsu%26F2%25setnaicinisievomiedseroterrocarapsasoilavsacidF2%25roterrocavivF2%25rb.moc.laeraviv.wwwF2%25F2%25A3%25ptth%3Dlru%26UAM6ggFQcBAi2UHKApjMUhALft4AbMsyjwEKUha0%3Ddev%266%3Ddc%26bew%3Decruos%26s%3Dcrse%26%3Dq%26j%3Dtcr%26t%3Das%3Flru%2Frb.moc.elgoog.www%2F%2F%3Aptth&_=1458769251374\",#012 \"HTTP/1.1\",#012 \"host: www.vivareal.com.br\",#012 \"Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01\",#012 \"Accept-Encoding: gzip, deflate\",#012 \"Accept-Language: pt-br,pt;q=0.8,en-us;q=0.5,en;q=0.3\",#012 \"Cache-Control: max-age=259200\",#012 \"Cookie: PHPSESSID=1oa3l6uvv0labm1anpuebvo0n6\",#012 \"Referer: http://www.vivareal.com.br/vivacorretor/dicasvaliosasparacorretoresdeimoveisiniciantes/\",#012 \"User-Agent: Mozilla/5.0 (X11; Linux i686; rv:21.0) Gecko/20100101 Firefox/21.0\",#012 \"Via: 1.1 prdproxy51.prd:8080 (squid/2.7.STABLE9)\",#012 \"X-Requested-With: XMLHttpRequest\",#012 \"X-Forwarded-Port: 80\",#012 \"X-Forwarded-Proto: http\",#012 \"Connection: keep-alive\",#012 \"X-Forwarded-For: 10.137.34.2, 200.201.3.51, 10.2.5.120\",#012 },#012 },#012 vcl = {#012 temp = warm#012 srcname = {#012 \"/etc/varnish/site.vcl\",#012 \"Builtin\",#012 \"/etc/varnish/devicedetect.vcl\",#012 },#012 },#012 flags = {#012 },#012},#012#012"
Mar 23 18:40:53 ca-site-cache-6423 varnishd[2957]: Child (12211) said Child starts
Mar 23 18:40:53 ca-site-cache-6423 varnishd[2957]: Child (12211) said SMF.s0 mmap'ed 27917287424 bytes of 27917287424
Mar 23 18:41:20 ca-site-cache-6423 varnishd[2957]: Child (12211) died signal=6
Mar 23 18:41:20 ca-site-cache-6423 varnishd[2957]: Child (12211) Last panic at: Wed, 23 Mar 2016 21:41:20 GMT#012"Assert error in child_sigsegv_handler(), mgt/mgt_child.c line 282:#012 Condition(Segmentation fault by instruction at (nil)) not true.#012thread = (cache-worker)#012version = varnish-4.1.2 revision 0d7404e#012ident = Linux,4.1.13-19.30.amzn1.x86_64,x86_64,-junix,-sfile,-smalloc,-hcritbit,epoll#012Backtrace:#012 0x432d03: varnishd() [0x432d03]#012 0x452659: varnishd() [0x452659]#012 0x7f13bf64f100: libpthread.so.0(+0xf100) [0x7f13bf64f100]#012 0x7f13b25fbdef: libvmod_querystring.so(vmod_sort+0x2ef) [0x7f13b25fbdef]#012 0x7f13b6484242: vgc.so(VGC_function_vcl_recv+0x62) [0x7f13b6484242]#012 0x43f274: varnishd() [0x43f274]#012 0x43f63a: varnishd(VCL_recv_method+0x5a) [0x43f63a]#012 0x437496: varnishd(CNT_Request+0x7a6) [0x437496]#012 0x44e27b: varnishd(HTTP1_Session+0x11b) [0x44e27b]#012 0x43a22d: varnishd(SES_Proto_Req+0x5d) [0x43a22d]#012req = 0x7f13beb12020 {#012 vxid = 30, step = R_STP_RECV,#012 req_body = R_BODY_NONE,#012 restarts = 0, esi_level = 0,#012 sp = 0x7f13b712ea20 {#012 fd = 66, vxid = 229413,#012 client = 10.2.5.120 59872,#012 step = S_STP_H1PROC,#012 },#012 worker = 0x7f13bf02cc00 {#012 stack = {0x7f13bf02d000 -> 0x7f13bf021000},#012 ws = 0x7f13bf02cdf8 {#012 id = \"wrk\",#012 {s,f,r,e} = {0x7f13bf02c3c0,0x7f13bf02c3c0,(nil),+2040},#012 },#012 VCL::method = inside RECV,#012 VCL::return = abandon,#012 VCL::methods = {RECV},#012 },#012 ws = 0x7f13beb12200 {#012 id = \"req\",#012 {s,f,r,e} = {0x7f13beb14000,+1664,+57336,+57336},#012 },#012 http_conn = 0x7f13beb12128 {#012 fd = 66,#012 doclose = NULL,#012 ws = 0x7f13beb12200,#012 {rxbuf_b, rxbuf_e} = {0x7f13beb14000, 0x7f13beb143ba},#012 {pipeline_b, pipeline_e} = {(nil), (nil)},#012 content_length = -1,#012 body_status = none,#012 first_byte_timeout = 0.000000,#012 between_bytes_timeout = 0.000000,#012 },#012 http[req] = 0x7f13beb12298 {#012 ws[req] = 0x7f13beb12200,#012 hdrs {#012 \"GET\",#012 \"/vivacorretor/wp-admin/admin-ajax.php?callback=po_data&orig_request_uri=%2Fvivacorretor%2Fsalario-afinal-quanto-ganha-um-corretor-de-imoveis%2F&action=inc_popup&do=get_data&thefrom=%2Fsievomi-ed-roterroc-mu-ahnag-otnauq-lanifa-oiralas%2Froterrocaviv%2Frb.moc.laeraviv.www%2F%2F%3Aptth&thereferrer=&_=1458769278622\",#012 \"HTTP/1.1\",#012 \"host: www.vivareal.com.br\",#012 \"Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01\",#012 \"Accept-Encoding: gzip,deflate,br\",#012 \"Accept-Language: en\",#012 \"Referer: http://www.vivareal.com.br/vivacorretor/salario-afinal-quanto-ganha-um-corretor-de-imoveis/\",#012 \"User-Agent: Mozilla/5.0 (Linux; Android 4.2.1; en-us; Nexus 5 Build/JOP40D) AppleWebKit/535.19 (KHTML, like Gecko; googleweblight) Chrome/38.0.1025.166 Mobile Safari/535.19\",#012 \"X-Requested-With: XMLHttpRequest\",#012 \"X-Forwarded-Port: 80\",#012 \"X-Forwarded-Proto: http\",#012 \"Connection: keep-alive\",#012 \"X-Forwarded-For: 201.150.48.230, 64.233.172.182, 10.2.5.120\",#012 },#012 },#012 vcl = {#012 temp = warm#012 srcname = {#012 \"/etc/varnish/site.vcl\",#012 \"Builtin\",#012 \"/etc/varnish/devicedetect.vcl\",#012 },#012 },#012 flags = {#012 },#012},#012#012"
Mar 23 18:41:20 ca-site-cache-6423 varnishd[2957]: Child (13527) said Child starts
Mar 23 18:41:20 ca-site-cache-6423 varnishd[2957]: Child (13527) said SMF.s0 mmap'ed 27917287424 bytes of 27917287424
Mar 23 18:51:28 ca-site-cache-6423 varnishd[2957]: Child (13527) died signal=6
Mar 23 18:51:28 ca-site-cache-6423 varnishd[2957]: Child (13527) Last panic at: Wed, 23 Mar 2016 21:51:28 GMT#012"Assert error in child_sigsegv_handler(), mgt/mgt_child.c line 282:#012 Condition(Segmentation fault by instruction at (nil)) not true.#012thread = (cache-worker)#012version = varnish-4.1.2 revision 0d7404e#012ident = Linux,4.1.13-19.30.amzn1.x86_64,x86_64,-junix,-sfile,-smalloc,-hcritbit,epoll#012Backtrace:#012 0x432d03: varnishd() [0x432d03]#012 0x452659: varnishd() [0x452659]#012 0x7f13bf64f100: libpthread.so.0(+0xf100) [0x7f13bf64f100]#012 0x7f13b25fbdef: libvmod_querystring.so(vmod_sort+0x2ef) [0x7f13b25fbdef]#012 0x7f13b6484242: vgc.so(VGC_function_vcl_recv+0x62) [0x7f13b6484242]#012 0x43f274: varnishd() [0x43f274]#012 0x43f63a: varnishd(VCL_recv_method+0x5a) [0x43f63a]#012 0x437496: varnishd(CNT_Request+0x7a6) [0x437496]#012 0x44e27b: varnishd(HTTP1_Session+0x11b) [0x44e27b]#012 0x43a22d: varnishd(SES_Proto_Req+0x5d) [0x43a22d]#012req = 0x7f13b6097020 {#012 vxid = 196849, step = R_STP_RECV,#012 req_body = R_BODY_WITH_LEN,#012 restarts = 0, esi_level = 0,#012 sp = 0x7f13b381fc20 {#012 fd = 67, vxid = 196846,#012 client = 10.2.5.120 63095,#012 step = S_STP_H1PROC,#012 },#012 worker = 0x7f13b66c5c00 {#012 stack = {0x7f13b66c6000 -> 0x7f13b66ba000},#012 ws = 0x7f13b66c5df8 {#012 id = \"wrk\",#012 {s,f,r,e} = {0x7f13b66c53c0,0x7f13b66c53c0,(nil),+2040},#012 },#012 VCL::method = inside RECV,#012 VCL::return = abandon,#012 VCL::methods = {RECV},#012 },#012 ws = 0x7f13b6097200 {#012 id = \"req\",#012 {s,f,r,e} = {0x7f13b6099000,+4488,+57336,+57336},#012 },#012 http_conn = 0x7f13b6097128 {#012 fd = 67,#012 doclose = NULL,#012 ws = 0x7f13b6097200,#012 {rxbuf_b, rxbuf_e} = {0x7f13b6099000, 0x7f13b6099dd5},#012 {pipeline_b, pipeline_e} = {0x7f13b6099dd5, 0x7f13b6099e23},#012 content_length = 78,#012 body_status = length,#012 first_byte_timeout = 0.000000,#012 between_bytes_timeout = 0.000000,#012 },#012 http[req] = 0x7f13b6097298 {#012 ws[req] = 0x7f13b6097200,#012 hdrs {#012 \"POST\",#012 \"/searchers/login?apiKey=183d98b9-fc81-4ef1-b841-7432c610b36e&portal=VR_BR&access_token=eyJhbGciOiJIUzI1NiJ9.eyJ1c2VyX25hbWUiOiI1NmFhOWY1OWU0YjBjNWM0ZTcxNmZiODUiLCJhdXRob3JpdGllcyI6WyJST0xFX1VTRVIiXSwianRpIjoiYjljNTljYjktZjI3NC00ZTA2LThiNGItYzhhNTYxODk4OWQ1IiwiY2xpZW50X2lkIjoiZDdjNThlYjgtMmJhYS00ZTZjLTgyOTctNjk3ZmNmMGM3ZDM0Iiwic2NvcGUiOlsicmVhZCIsIndyaXRlIl19.t2C5yKsPdkKojeyX61CiRp3bu1UJtiIm9hQRfSQipaI\",#012 \"HTTP/1.1\",#012 \"host: www.vivareal.com.br\",#012 \"Accept: application/json, text/javascript, */*; q=0.01\",#012 \"Accept-Encoding: gzip, deflate\",#012 \"Accept-Language: pt-BR,pt;q=0.8,en-US;q=0.6,en;q=0.4\",#012 \"Content-Type: application/json\",#012 \"Cookie: new_vivareal_user_id=2a9ec957ed64e28ac2b197bb116971ba; __gads=ID=b9129c4992ff0762:T=1457031724:S=ALNI_MYeP7lscSg5hjx-yRQLktG3KEeBhA; optimizelyEndUserId=oeu1457184170267r0.7011718996800482; __ll_websdk_pa=1457184170; __ll_websdk_iu=%22f01e7ac7-218c-2e58-5d74-8c98016ab56c%22; optOutCookie=true; vivareal_ranking=0; VR_SIMILAR_OPT_OUT=false; __ll_websdk_csi=27; __ll_websdk_cst=1458767779; __ll_websdk_csu=%22eb04bce9-aa9f-8bd2-2d9a-5ea3df56ae14%22; __ll_websdk_lot=1458767779; __ll_websdk_fl=[%22Search%20Results%22]; sb_client=56d48439725bce5f86778d69; sb_customer=55s62e8c93fdfc8e14762c5btb2c2ec0d79e176c521498bf7a2772974h633b231376c7; sb_browser=52cdcbc18c913619a4e400096f085850; sb_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJodHRwczpcL1wvYXBpLnNiYWNrLnRlY2giLCJpYXQiOjE0NTg3Njc4MDQsImV4cCI6MTQ1ODg1NDIwNCwiZGF0YSI6eyJwdWJsaWNfaWQiOnsiY2xpZW50IjoiNTZkNDg0Mzk3MjViY2U1Zjg2Nzc4ZDY5IiwiY3VzdG9tZXIiOiI1NXM2MmU4YzkzZmRmYzhlMTQ3NjJjNWJ0YjJjMmVjMGQ3OWUxNzZjNTIxNDk4YmY3YTI3NzI5NzRoNjMzYjIzMTM3NmM3IiwiZG9tYWluIjoidml2YXJlYWwuY29tLmJyIn0sImxldmVsIjoianNzZGsifX0.XwPh2aBjhO44WoG49GWQP1jFjgCDXXCdrWAEouEF_lM.WrWrzRDriYEiuyEiiYqBzR; 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VR_COUNT_ACCESS=305; _ga=GA1.3.336455948.1457031729; _gat=1; _gat_newTracker=1; _ceg.s=o4ii18; _ceg.u=o4ii18; _st_ses=3126315704991802; _spcid=264; _st_no_script=1; _spl_pv=544; optimizelyPendingLogEvents=%5B%22n%3Dengagement%26u%3Doeu1457184170267r0.7011718996800482%26wxhr%3Dtrue%26time%3D1458769888.739%26f%3D5195491626%2C5377881308%26g%3D29327782%22%5D; _st_id=bWlyby5pbnZlc3RpbW92ZWlzQGdtYWlsLmNvbQ==\",#012 \"Origin: http://www.vivareal.com.br\",#012 \"Referer: http://www.vivareal.com.br/\",#012 \"User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36\",#012 \"X-Requested-With: XMLHttpRequest\",#012 \"X-Forwarded-Port: 80\",#012 \"X-Forwarded-Proto: http\",#012 \"Content-Length: 78\",#012 \"Connection: keep-alive\",#012 \"X-Forwarded-For: 177.18.226.191, 10.2.5.120\",#012 },#012 },#012 vcl = {#012 temp = warm#012 srcname = {#012 \"/etc/varnish/site.vcl\",#012 \"Builtin\",#012 \"/etc/varnish/devicedetect.vcl\",#012 },#012 },#012 flags = {#012 },#012},#012#012"
Mar 23 18:51:28 ca-site-cache-6423 varnishd[2957]: Child (18658) said Child starts
Mar 23 18:51:28 ca-site-cache-6423 varnishd[2957]: Child (18658) said SMF.s0 mmap'ed 27917287424 bytes of 27917287424
When I removed the sort function, the error disappeared.
Any information that I can provide to help with this problem, feel free to ask me.