<div dir="auto"><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Hello everyone,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">today i had a strange panic error on my Varnish.</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">It is not really obvious to me what went wrong, any help would be much appreciated.</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">I'm  running varnish 6.0.3</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Panic at: Tue, 19 Nov 2019 19:28:02 GMT</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Assert error in vbf_stp_error(), cache/cache_fetch.c line 800:Condition((VSB_finish(synth_body)) == 0) not true.</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">version = varnish-6.0.3 revision 7d1ded3aa033a018317dbafc61587026ea2ef8a3, vrt api = 7.0</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">ident = Linux,3.10.0-693.11.6.el7.x86_64,x86_64,-junix,-smalloc,-sdefault,-hcritbit,epoll</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">now = 17076364.384963 (mono), 1574191668.252235 (real)</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Backtrace:</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">errno = 12 (Cannot allocate memory)</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">thread = (cache-worker)</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">thr.req = (nil) {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">thr.busyobj = 0x7fada9c7e020 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  end = 0x7fada9c8e000,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  retries = 0,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  sp = 0x7fad00501620 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    fd = 13433, vxid = 694059016,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    t_open = 1574191668.121636,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    t_idle = 1574191668.121636,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    ws = 0x7fad00501660 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      id = \"ses\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      {s, f, r, e} = {0x7fad00501698, +56, (nil), +352},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    transport = HTTP/1 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      state = HTTP1::Proc</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    }</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    client = 0.0.0.0 0 /dev/shm/varnish.sock,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  worker = 0x7fac63522bd0 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    ws = 0x7fac63522c78 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      id = \"wrk\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      {s, f, r, e} = {0x7fac63522380, +0, (nil), +2040},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    VCL::method = BACKEND_ERROR,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    VCL::return = fail,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    VCL::methods = {BACKEND_FETCH, BACKEND_RESPONSE, BACKEND_ERROR},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  vfc = 0x7fada9c7ff10 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    failed = 1,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    req = 0x7fada9c7e620,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    resp = 0x7fada9c7ea98,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    wrk = 0x7fac63522bd0,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    oc = 0x7fac9bd5f140,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    filters = {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      V1F_STRAIGHT = 0x7fada9c858c0 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        priv1 = 0x7fada9c808c0,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        priv2 = 19999,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        closed = 0</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    obj_flags = 0x0,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  ws = 0x7fada9c7e058 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    id = \"bo\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    {s, f, r, e} = {0x7fada9c7ff58, +23096, (nil), +57504},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  ws_bo = 0x7fada9c808a8,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  http[bereq] = 0x7fada9c7e620 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    ws = 0x7fada9c7e058 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      [Already dumped, see above]</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    hdrs {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"GET\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"/openreqs?_=1574191667646\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"HTTP/1.1\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Host: www.xxx.yy\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"X-Real-IP: 176.58.172.113\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"X-Forwarded-Proto: https\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Accept-Encoding: gzip\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"CF-IPCountry: GB\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"accept: application/json, text/javascript, /; q=0.01\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"dnt: 1\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"x-requested-with: XMLHttpRequest\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"sec-fetch-site: same-origin\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"sec-fetch-mode: cors\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"referer: <a href="https://www.xxx.yy/%5C" style="text-decoration-line:none;color:rgb(66,133,244)">https://www.xxx.yy/\</a>",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"accept-language: en-GB,en;q=0.9,q=0.8,el;q=0.7,en-US;q=0.6,de;q=0.5\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"CF-Connecting-IP: 176.58.172.113\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"CDN-Loop:MF\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"X-Forwarded-For: 176.58.172.113, 176.58.172.113, 0.0.0.0\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"sticky: 9.385\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"cookie: __uid=d69a4ebccdf450dca2f56195270fb54101561187829; _landing=1;sticky=stx9.385; _tz=120; _tz_intl=Europe%2FLondon; ",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"X-defHash: /openreqs?_=1574191667646 + www.xxx.yy\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"X-Varnish: 694059018\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  http[beresp] = 0x7fada9c7ea98 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    ws = 0x7fada9c7e058 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      [Already dumped, see above]</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    hdrs {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"HTTP/1.1\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"503\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Backend fetch failed\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Date: Tue, 19 Nov 2019 19:27:48 GMT\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Server: Varnish\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Content-Type: text/html; charset=utf-8\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      \"Retry-After: 5\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  objcore[fetch] = 0x7fac9bd5f140 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    refcnt = 2,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    flags = {busy, hfm, private},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    exp_flags = {},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    boc = 0x7fac9bd61ce0 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      refcnt = 2,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      state = req_done,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      vary = (nil),</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      stevedore_priv = (nil),</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    exp = {1574191668.252177, 0.000000, 0.000000, 0.000000},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    objhead = 0x7faeea0ce160,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    stevedore = (nil),</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  flags = {do_stream, do_pass, uncacheable},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  director_req = 0x7faeea0e1310 {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    vcl_name = web01,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    health = healthy,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    admin_health = probe, changed = 1574176692.243255,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    type = backend {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      display_name = boot.web01,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      ipv4 = xxx.xxx.xxx.xxx,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      port = 80,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      hosthdr = xxx.xxx.xxx.xxx,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      n_conn = 24,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  director_resp = director_req,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  vcl = {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    name = \"boot\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    busy = 46459,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    discard = 0,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    state = auto,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    temp = warm,</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    conf = {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      syntax = \"41\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      srcname = {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/default.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"Builtin\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/origins1.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/origins-2.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/origins-3.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/origins-others.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/origins-4.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/origins5.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/ban.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">        \"/etc/varnish/backend_error.vcl\",</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">      },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">    },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  },</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">vmods = {</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  std = {Varnish 6.0.3 7d1ded3aa033a018317dbafc61587026ea2ef8a3, 0.0},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  directors = {Varnish 6.0.3 7d1ded3aa033a018317dbafc61587026ea2ef8a3, 0.0},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  cookie = {Varnish 6.0.3 7d1ded3aa033a018317dbafc61587026ea2ef8a3, 7.0},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">  header = {Varnish 6.0.3 7d1ded3aa033a018317dbafc61587026ea2ef8a3, 7.0},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">},</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">   Could you please take a look and advise?</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Thank you in advance</div><div dir="auto" style="font-family:sans-serif;font-size:12.8px"><br></div><div dir="auto" style="font-family:sans-serif;font-size:12.8px">Regards</div></div>