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Updating Varnish to latest version issue
Hello all,

I've just updated my (Centos 7.3) varnish to the latest stable version from
4.1.4 to 4.1.5 which resulted in the following:

Feb 22 09:15:17 varnish01 varnishd[13228]: Child (13230) not responding to
CLI, killed it.
Feb 22 09:15:17 varnish01 varnishd[13228]: Unexpected reply from ping: 400
CLI communication error (hdr)
Feb 22 09:15:17 varnish01 varnishd[13228]: Child (13230) not responding to
CLI, killed it.
Feb 22 09:15:17 varnish01 varnishd[13228]: Unexpected reply from ping: 400
CLI communication error
Feb 22 09:15:18 varnish01 varnishd[13228]: Child (13230) died signal=11
Feb 22 09:15:18 varnish01 varnishd[13228]: Child (13230) Last panic at:
Wed, 22 Feb 2017 09:15:18 GMT#012"Wrong turn at
cache/cache_session.c:551:#012Clock step detected#012thread =
(cache-worker)#012version = varnish-4.1.5 revision 2c82b1c#012ident =
Linux,3.10.0-514.6.1.el7.x86_64,x86_64,-junix,-smalloc,-smalloc,-hcritbit,epoll#012now
= 702.656884 (mono), 1487754906.433703 (real)#012Backtrace:#012 0x434662:
pan_ic+0x192#012 0x43c1e3: varnishd() [0x43c1e3]#012 0x436177:
Req_Cleanup+0x1f7#012 0x450bcd: HTTP1_Session+0xbd#012 0x43accd:
SES_Proto_Req+0x5d#012 0x44b209: WRK_Thread+0x4c9#012 0x44b67b:
pool_thread+0x2b#012 0x7fa3501dbdc5: libpthread.so.0(+0x7dc5)
[0x7fa3501dbdc5]#012 0x7fa34ff0a73d: libc.so.6(clone+0x6d)
[0x7fa34ff0a73d]#012req = 0x7fa2d4d41020 {#012 MAGIC 0x00000000
(Should:REQ_MAGIC/0x2751aaa1)#012 vxid = 0, step = R_STP_RESTART,#012
req_body = R_BODY_INIT,#012 restarts = 0, esi_level = 0,#012 ws =
0x7fa2d4d41200 {#012
MAGIC 0x00000000 (Should:WS_MAGIC/0x35fac554)#012 id = \"\",#012
{s,f,r,e} = {(nil),(nil),(nil),(nil)},#012 },#012 http[req] = (nil)
{#012"
Feb 22 09:15:18 varnish01 varnishd[13228]: Child cleanup complete
Feb 22 09:15:18 varnish01 varnishd[13228]: Child (11686) Started
Feb 22 09:15:18 varnish01 varnishd[13228]: Child (11686) said Child starts

Any help will be greatly appreciated!

Thanks in advance

PS. I've never had any similar problem with the previous version (4.1.4)

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Dimitris Magnis
Junior Systems Administrator
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Re: Updating Varnish to latest version issue [ In reply to ]
> PS. I've never had any similar problem with the previous version (4.1.4)

Hello,

The same panic can occur with 4.1.4 so this is nothing new. There's a
clock_step parameter to define how much drift you want to tolerate,
see man varnishd.

Dridi

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