[Varnish] #1730: Child panic

[Varnish]

#1730: Child panic
---------------------+--------------------
 Reporter:  llavaud  |       Type:  defect
   Status:  new      |   Priority:  normal
Milestone:           |  Component:  build
  Version:  trunk    |   Severity:  major
 Keywords:  panic    |
---------------------+--------------------
 {{{
 May  4 15:18:21 webcache24 varnishd[860319]: Child (860338) died signal=6
 May  4 15:18:21 webcache24 varnishd[860319]: Child (860338) Panic message:
 Assert error in vbe_dir_finish(), cache/cache_backend.c line 165:
   Condition((wrk) != NULL) not true.
 errno = 111 (Connection refused)
 thread = (cache-worker)
 version = varnish-trunk revision fc41c5c
 ident = Linux,3.2.0-4-amd64,x86_64,-junix,-sfile,-smalloc,-hcritbit,epoll
 Backtrace:
   0x433034: pan_ic+0x134
   0x41262e: vbe_dir_finish+0x25e
   0x41b9c0: VDI_Http1Pipe+0x50
   0x437d5c: CNT_Request+0xf7c
   0x44c58b: HTTP1_Session+0x12b
   0x43a7f1: SES_Proto_Req+0x61
   0x4354d8: Pool_Work_Thread+0x3c8
   0x447da3: WRK_Thread+0x103
   0x4348cb: pool_thread+0x2b
   0x7f2fa597cb50: libpthread.so.0(+0x6b50) [0x7f2fa597cb50]
 req = 0x7f163fc77020 {
   sp = 0x7f16579b9220, vxid = 18803899,  step = R_STP_PIPE,
   req_body = R_BODY_WITH_LEN,
   restarts = 0, esi_level = 0,
   sp = 0x7f16579b9220 {
     fd = -1, vxid = 18803898,
     client = 109.25.8.176 63259,
     step = S_STP_H1PROC,
   },
   worker = 0x7f165d7cac30 {
     stack = {0x7f165d7cb000 -> 0x7f165d7bf000}
     ws = 0x7f165d7cae38 {
       id = "wrk",
       {s,f,r,e} = {0x7f165d7ca420,0x7f165d7ca420,(nil),+2040},
     },
     VCL::method = PIPE,
     VCL::return = pipe,
     VCL::methods = {RECV, PIPE, HASH},
   },
   ws = 0x7f163fc77200 {
     id = "req",
     {s,f,r,e} = {0x7f163fc79020,+3048,(nil),+253912},
   },
   http[req] = {
     ws = 0x7f163fc77200[req]
       "PROPFIND",
       "/myuri",
       "HTTP/1.1",
       "Keep-Alive:",
       "Connection: TE, Keep-Alive",
       "TE: trailers",
       "Depth: 0",
       "Content-Length: 237",
       "Co
 }}}

-- 
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1730>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator