[Varnish] #1863: Assert error in child_sigsegv_handler()

Varnish varnish-bugs at varnish-cache.org
Mon Feb 29 21:50:54 CET 2016

#1863: Assert error in child_sigsegv_handler()
 Reporter:  batty  |       Type:  defect
   Status:  new    |   Priority:  normal
Milestone:         |  Component:  varnishd
  Version:  4.1.1  |   Severity:  major
 Keywords:         |
 Upgraded from Varnish 3.0.6 to 4.1.1 late last week on a tier of three
 servers.  We use BANs quite a bit.  On one of the servers in the tier,
 we've received this assert twice.


 Last panic at: Mon, 29 Feb 2016 15:12:04 GMT

 "Assert error in child_sigsegv_handler(), mgt/mgt_child.c line 282:

   Condition(Segmentation fault by instruction at 0x28) not true.

 thread = (ban-lurker)

 version = varnish-4.1.1 revision 66bb824

 ident =


   0x4328b3: varnishd() [0x4328b3]

   0x451f09: varnishd() [0x451f09]

   0x7f7aa70277e0: libpthread.so.0(+0xf7e0) [0x7f7aa70277e0]

   0x417dc5: varnishd(ban_lurker+0x6b5) [0x417dc5]

   0x448527: varnishd() [0x448527]

   0x7f7aa701faa1: libpthread.so.0(+0x7aa1) [0x7f7aa701faa1]

   0x7f7aa6d6893d: libc.so.6(clone+0x6d) [0x7f7aa6d6893d]


 I'm working with our operations team to try to enable core dumps and get a
 back trace.

Ticket URL: <https://www.varnish-cache.org/trac/ticket/1863>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator

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