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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You are not waiting long enough for the backend. You need logic
to restart if the first request fails.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Use two directors, one “impatient” and one “patient”, with a
longer wait time for first byte. Restart if the first request to the fast
director fails, and use the slow, patient director for that one.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Stefan Caunter :: Senior Systems Administrator :: TOPS<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>e: scaunter@topscms.com :: m: (416) 561-4871<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>www.thestar.com www.topscms.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> varnish-misc-bounces@varnish-cache.org
[mailto:varnish-misc-bounces@varnish-cache.org] <b>On Behalf Of </b>Jerais
Al-Jeraisy<br>
<b>Sent:</b> July-24-10 6:12 AM<br>
<b>To:</b> varnish-misc@varnish-cache.org<br>
<b>Subject:</b> 503 error after idle session<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>Hello,<br>
We started to implement varnish @ our infrastructure as a reverse proxy in
front of Sharepoint, and it's doing good.<br>
but there's a strange problem, if i requested varnish for the first time it
works fine, but after, say 2 mins, if i hit the page again or refresh it it
takes too long to respond and throw 503 error.<br>
it works the the default configurations, changes only on backend host.<br>
server details:<br>
host: CentOS release 5.5 (Final) x64.<br>
varnish: varnish-2.0.6<br>
<br>
here's varnishlog:<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963716 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963719 1.0<br>
13 SessionOpen c 10.131.36.170 52969 :80<br>
13 ReqStart c 10.131.36.170 52969
374027480<br>
13 RxRequest c GET<br>
13 RxURL c /default.aspx<br>
13 RxProtocol c HTTP/1.1<br>
13 RxHeader c Host: xx.xx.xx.xx<br>
13 RxHeader c User-Agent: Mozilla/5.0
(X11; U; Linux i686; en-US; rv:1.9.0.15) Gecko/2009102704 Fedora/3.0.15-1.fc10
Firefox/3.0.15<br>
13 RxHeader c Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8<br>
13 RxHeader c Accept-Language:
en-us,en;q=0.5<br>
13 RxHeader c Accept-Encoding:
gzip,deflate<br>
13 RxHeader c Accept-Charset:
ISO-8859-1,utf-8;q=0.7,*;q=0.7<br>
13 RxHeader c Keep-Alive: 300<br>
13 RxHeader c Connection: keep-alive<br>
13 RxHeader c Cookie:
SESS253f3165f282ca21e0aff96094b2f186=4om57skb5bthlv12hno77nefg3;
SESS3c5368fdadd84553468b7aecbb6b8c56=m9okd8i89jeq777sn3c363cge7;
ISAWPLB{30E7D663-ACFC-44A1-A8C4-C17514BA8234}={20C55D85-138B-4814-9748-CEA17E9D6759}<br>
13 VCL_call c recv<br>
13 VCL_return c pass<br>
13 VCL_call c pass<br>
13 VCL_return c pass<br>
13 Backend c 22 default default<br>
22 TxRequest - GET<br>
22 TxURL - /default.aspx<br>
22 TxProtocol - HTTP/1.1<br>
22 TxHeader - Host: xx.xx.xx.xx<br>
22 TxHeader - User-Agent: Mozilla/5.0
(X11; U; Linux i686; en-US; rv:1.9.0.15) Gecko/2009102704 Fedora/3.0.15-1.fc10
Firefox/3.0.15<br>
22 TxHeader - Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8<br>
22 TxHeader - Accept-Language:
en-us,en;q=0.5<br>
22 TxHeader - Accept-Encoding:
gzip,deflate<br>
22 TxHeader - Accept-Charset:
ISO-8859-1,utf-8;q=0.7,*;q=0.7<br>
22 TxHeader - Cookie:
SESS253f3165f282ca21e0aff96094b2f186=4om57skb5bthlv12hno77nefg3;
SESS3c5368fdadd84553468b7aecbb6b8c56=m9okd8i89jeq777sn3c363cge7;
ISAWPLB{30E7D663-ACFC-44A1-A8C4-C17514BA8234}={20C55D85-138B-4814-9748-CEA17E9D6759}<br>
22 TxHeader - X-Varnish: 374027480<br>
22 TxHeader - X-Forwarded-For:
10.131.36.170<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963722 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963725 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963728 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963731 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963734 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963737 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963740 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963743 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963746 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963749 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963752 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963755 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963758 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963761 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963764 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963767 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963770 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963773 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963776 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963779 1.0<br>
13 FetchError c http read error: 11<br>
22 BackendClose - default<br>
13 VCL_call c error<br>
13 VCL_return c deliver<br>
13 Length c 471<br>
13 VCL_call c deliver<br>
13 VCL_return c deliver<br>
13 TxProtocol c HTTP/1.1<br>
13 TxStatus c 503<br>
13 TxResponse c Service Unavailable<br>
13 TxHeader c Server: Varnish<br>
13 TxHeader c Retry-After: 0<br>
13 TxHeader c Content-Type: text/html;
charset=utf-8<br>
13 TxHeader c Content-Length: 471<br>
13 TxHeader c Date: Sat, 24 Jul 2010
09:29:40 GMT<br>
13 TxHeader c X-Varnish: 374027480<br>
13 TxHeader c Age: 60<br>
13 TxHeader c Via: 1.1 varnish<br>
13 TxHeader c Connection: close<br>
13 ReqEnd c 374027480
1279963720.108640909 1279963780.108922005 0.000058889 60.000254154 0.000026941<br>
13 SessionClose c error<br>
13 StatSess c 10.131.36.170 52969 60 1 1 0
1 0 235 471<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963782 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963785 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963788 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963791 1.0<br>
0 CLI
- Rd ping<br>
0 CLI
- Wr 0 200 PONG 1279963794 1.0<br>
<br>
varnishstats:<br>
<br>
69
0.00 0.01 Client connections
accepted<br>
605
0.00 0.10 Client requests
received<br>
40
0.00 0.01 Backend conn. success<br>
565
0.00 0.09 Backend conn. reuses<br>
16
0.00 0.00 Backend conn. was
closed<br>
582
0.00 0.10 Backend conn.
recycles<br>
550
0.00 0.09 Fetch with Length<br>
28
0.00 0.00 Fetch chunked<br>
7
.
. N struct sess_mem<br>
1
.
. N struct sess<br>
0
.
. N struct object<br>
8
.
. N struct objecthead<br>
1
.
. N struct smf<br>
1
.
. N large free smf<br>
1 .
. N struct vbe_conn<br>
6
.
. N struct bereq<br>
10
.
. N worker threads<br>
10
0.00 0.00 N worker threads
created<br>
1
.
. N backends<br>
125
0.00 0.02 Objects sent with
write<br>
69
0.00 0.01 Total Sessions<br>
605
0.00 0.10 Total Requests<br>
605
0.00 0.10 Total pass<br>
594
0.00 0.10 Total fetch<br>
<br>
<br>
<br>
<o:p></o:p></p>
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