Mailing List Archive: Varnish: Bugs

#1257: Varnish restarting it self, large cache.

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varnish-bugs at varnish-cache

Jan 29, 2013, 5:26 AM

Post #1 of 6 (206 views)
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#1257: Varnish restarting it self, large cache.

#1257: Varnish restarting it self, large cache.
---------------------------+--------------------
Reporter: anders-bazoom | Type: defect
Status: new | Priority: normal
Milestone: | Component: build
Version: 3.0.3 | Severity: major
Keywords: |
---------------------------+--------------------
Okay, we have a varnish server in front of an image server. We recently
tried the file storage option instead of malloc, to increase our hit
rates.

But it's giving us some problems. The master process will restart the
child process on seemingly random(they are probably not random :p)
intervals. Sometimes after 20minutes, longest it has lasted has been about
48 hours. This last time it restarted, I saw a panic message for the first
time. The previous reboots only produced died signal=6

http://pastebin.com/BTFzeYRd
{{{
varnish> panic.show
200
Last panic at: Tue, 29 Jan 2013 10:25:13 GMT
Assert error in default_oc_getobj(), stevedore.c line 65:
Condition(((o))->magic == (0x32851d42)) not true.
thread = (cache-worker)
ident = Linux,2.6.32-37-server,x86_64,-sfile,-smalloc,-hcritbit,epoll
Backtrace:
0x430768: /usr/sbin/varnishd() [0x430768]
0x44867c: /usr/sbin/varnishd() [0x44867c]
0x429f36: /usr/sbin/varnishd(HSH_Lookup+0x3a6) [0x429f36]
0x416b19: /usr/sbin/varnishd() [0x416b19]
0x41a265: /usr/sbin/varnishd(CNT_Session+0x705) [0x41a265]
0x4324b1: /usr/sbin/varnishd() [0x4324b1]
0x7f19771e89ca: /lib/libpthread.so.0(+0x69ca) [0x7f19771e89ca]
0x7f1976f4521d: /lib/libc.so.6(clone+0x6d) [0x7f1976f4521d]
sp = 0x7e76e7665008 {
fd = 218, id = 218, xid = 1472043706,
client = 66.249.76.55 42918,
step = STP_LOOKUP,
handling = hash,
restarts = 0, esi_level = 0
flags =
bodystatus = 4
ws = 0x7e76e7665080 {
id = "sess",
{s,f,r,e} = {0x7e76e7665c78,+464,+65536,+65536},
},
http[req] = {
ws = 0x7e76e7665080[sess]
"GET",
"/bruger/7/70/52/33443/EEEEEE/28-01-2013_213537",
"HTTP/1.1",
"Referer: http://www.bilgalleri.dk/forum/generel-
diskussion/936318-vinterhjul_",
"Connection: Keep-alive",
"Accept: */*",
"From: googlebot(at)googlebot.com",
"User-Agent: Mozilla/5.0 (compatible; Googlebot/2.1;
+http://www.google.com/bot.html)",
"host: billeder2.bilgalleri.dk",
"X-Forwarded-For: 66.249.76.55",
"Accept-Encoding: gzip",
},
worker = 0x7e76727fea90 {
ws = 0x7e76727fecc8 {
id = "wrk",
{s,f,r,e} = {0x7e76727eca20,0x7e76727eca20,(nil),+65536},
},
},
vcl = {
srcname = {
"input",
"Default",
},
},
},
}}}

It's a virtual server, with 16gigs of ram. The storage size is set to
650gb.

--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1257>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator

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varnish-bugs at varnish-cache

Feb 11, 2013, 3:51 AM

Post #2 of 6 (180 views)
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Re: #1257: Varnish restarting it self, large cache. [In reply to]

varnish-bugs at varnish-cache

Feb 11, 2013, 5:11 AM

Post #3 of 6 (184 views)
Permalink

Re: #1257: Varnish restarting it self, large cache. [In reply to]

#1257: Varnish restarting it self, large cache.
---------------------------+--------------------
Reporter: anders-bazoom | Owner:
Type: defect | Status: new
Priority: normal | Milestone:
Component: build | Version: 3.0.3
Severity: major | Resolution:
Keywords: |
---------------------------+--------------------

Comment (by anders-bazoom):

Here's the startup options
{{{
DAEMON_OPTS="-a :80 \
-T localhost:6082 \
-f /etc/varnish/default.vcl \
-S /etc/varnish/secret \
-s file,/var/lib/varnish/varnish_storage.bin,650G \
-p nuke_limit=3000"

}}}

And here's the default.vcl

{{{
backend bil {
.host = "billeder2.bilgalleri.dk";
.port = "80";
.connect_timeout = 5s;
}

sub vcl_recv {
if(req.http.host == "bilbilleder.invio.dk" || req.http.host ==
"bilbilleder2.invio.dk" || req.http.host == "bil.webgallerier.dk" ||
req.http.host == "bil2.webgallerier.dk"){
set req.backend = bil;
set req.http.host = "billeder2.bilgalleri.dk";
}
}

sub vcl_fetch {
if(beresp.status == 404){
set beresp.ttl = 0s;
}
}

}}}

The same VM is now running with malloc,10G - and has been running stable
since I created this ticket.

The VM has 2x1TB in Raid1, filesystem is ext4. And the hypervisor im not
sure about, I've seen hints at it being Parallels, but on the providers
site there is mention of VMWare. So I've sent them a mail - and will
report back here when I have the answer.

I installed varnish using the varnish package repository.

--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1257#comment:2>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator

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varnish-bugs at varnish-cache

Feb 25, 2013, 1:54 AM

Post #4 of 6 (178 views)
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Re: #1257: Varnish restarting it self, large cache. [In reply to]

varnish-bugs at varnish-cache

Mar 11, 2013, 4:26 AM

Post #5 of 6 (163 views)
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Re: #1257: Varnish restarting it self, large cache. [In reply to]

#1257: Varnish restarting it self, large cache.
---------------------------+--------------------
Reporter: anders-bazoom | Owner: phk
Type: defect | Status: new
Priority: normal | Milestone:
Component: build | Version: 3.0.3
Severity: major | Resolution:
Keywords: |
---------------------------+--------------------
Changes (by phk):

* owner: => phk

Comment:

I'm not certain that there is much we can do in the short term, until we
find a way to reproduce this where we can add debugging.

I'm keeping the ticket open, on the off-chance that they hypervisors
scheduling have exposed a race-condition in the varnish code.

--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1257#comment:4>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator

_______________________________________________
varnish-bugs mailing list
varnish-bugs [at] varnish-cache
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varnish-bugs at varnish-cache

Jul 15, 2013, 3:30 AM

Post #6 of 6 (61 views)
Permalink

Re: #1257: Varnish restarting it self, large cache. [In reply to]

#1257: Varnish restarting it self, large cache.
---------------------------+-------------------------
Reporter: anders-bazoom | Owner: phk
Type: defect | Status: closed
Priority: normal | Milestone:
Component: build | Version: 3.0.3
Severity: major | Resolution: worksforme
Keywords: |
---------------------------+-------------------------
Changes (by phk):

* status: new => closed
* resolution: => worksforme

Comment:

I'm timing this ticket out now.

--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1257#comment:5>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator

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varnish-bugs [at] varnish-cache
https://www.varnish-cache.org/lists/mailman/listinfo/varnish-bugs

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