[Varnish] #1242: Varnish throws 503 without touching the healthy backend
Varnish
varnish-bugs at varnish-cache.org
Tue Jan 1 15:51:36 CET 2013
#1242: Varnish throws 503 without touching the healthy backend
-------------------+----------------------
Reporter: xjia | Type: defect
Status: new | Priority: normal
Milestone: | Component: varnishd
Version: 3.0.0 | Severity: critical
Keywords: |
-------------------+----------------------
I'm running Varnish 3.0.0 (revision cbf1284) under Ubuntu 11.10. Requests
are sent to Varnish first, then should be dispatched to another server
running nginx 1.0.5 and MediaWiki 1.20.2.
varnishlog shows the backend is healthy. When I curl a wiki page, which is
accessible directly from nginx, Varnish gives 503 Service Unavailable.
However, I don't see any request in nginx log files.
varnishlog:
{{{
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1357050460 1.0
0 Backend_health - mediawiki Still healthy 4--X-RH 5 3 5 0.202436
0.173041 HTTP/1.1 200 OK
4 SessionOpen c 172.16.6.106 37505 :81
4 ReqStart c 172.16.6.106 37505 1372273948
4 RxRequest c GET
4 RxURL c /wiki/What_The_Fuck
4 RxProtocol c HTTP/1.1
4 RxHeader c User-Agent: curl/7.21.6 (x86_64-pc-linux-gnu)
libcurl/7.21.6 OpenSSL/1.0.0e zlib/1.2.3.4 libidn/1.22 librtmp/2.3
4 RxHeader c Host: 172.16.6.105:81
4 RxHeader c Accept: */*
4 VCL_call c recv lookup
4 VCL_call c hash
4 Hash c /wiki/What_The_Fuck
4 Hash c 172.16.6.105:81
4 VCL_return c hash
4 VCL_call c miss fetch
4 Backend c 5 mediawiki mediawiki
4 TTL c 1372273948 RFC 120 1357050462 0 0 0 0
4 VCL_call c fetch deliver
4 ObjProtocol c HTTP/1.1
4 ObjResponse c Service Unavailable
4 ObjHeader c Server: nginx/1.0.5
4 ObjHeader c Date: Tue, 01 Jan 2013 14:35:12 GMT
4 ObjHeader c Content-Type: text/html; charset=utf-8
4 ObjHeader c Retry-After: 5
4 ObjHeader c X-Varnish: 158017276
4 ObjHeader c Via: 1.1 varnish
4 VCL_call c deliver deliver
4 TxProtocol c HTTP/1.1
4 TxStatus c 503
4 TxResponse c Service Unavailable
4 TxHeader c Server: nginx/1.0.5
4 TxHeader c Content-Type: text/html; charset=utf-8
4 TxHeader c Retry-After: 5
4 TxHeader c X-Varnish: 158017276
4 TxHeader c Via: 1.1 varnish
4 TxHeader c Content-Length: 418
4 TxHeader c Accept-Ranges: bytes
4 TxHeader c Date: Tue, 01 Jan 2013 14:27:41 GMT
4 TxHeader c X-Varnish: 1372273948
4 TxHeader c Age: 0
4 TxHeader c Via: 1.1 varnish
4 TxHeader c Connection: keep-alive
4 Length c 418
4 ReqEnd c 1372273948 1357050461.651694775 1357050461.656989098
0.000372171 0.005029202 0.000265121
4 SessionClose c EOF
4 StatSess c 172.16.6.106 37505 0 1 1 0 0 1 306 418
0 CLI - Rd ping
0 CLI - Wr 200 19 PONG 1357050463 1.0
0 Backend_health - mediawiki Still healthy 4--X-RH 5 3 5 0.225957
0.186270 HTTP/1.1 200 OK
}}}
I tried to increase timeouts etc. but still doesn't work:
{{{
backend mediawiki {
.host = "172.16.6.106";
.port = "80";
.connect_timeout = 300s;
.first_byte_timeout = 60s;
.between_bytes_timeout = 30s;
.probe = {
.url = "/wiki/Main_Page";
.interval = 5s;
.timeout = 3s;
.window = 5;
.threshold = 3;
}
}
}}}
--
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1242>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator
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