[squid-users] Cache.log parameter descriptions (queue overload)

Hi All,

I am beginner to squid and I have implemented
transparent proxy using squid verion
squid-2.6.STABLE12 in bridge mode in RHEL AS release
4 (Nahant) with 4 GB of RAM and 3 Xeon Processor. The
squid handles 100s of request/minute. The squid has
been working properly but lately I have been getting
following error.

dnsSubmit: queue overload, rejecting www.orkut.com

Even after increasing the dns_children to 400. I am
still getting the queue overload error. After enabling
debug mode using squid -k debug command. I got the
following errors in the logs.

ipcacheParse: parsing: {$fail Temporary network
problem, please retry later}
cbdataValid: 0x35b94900
commConnectDnsHandle: Unknown host: www.orkut.com

There is no load in the server or high latency in the
network and when manually trying to resolve the site
using dig command the site is getting resolved in 2-5
ms.

Is there any bug in the squid version? Also please let
us know where I am find description for parameter like
commCallCloseHandlers,
commSetTimeout,commConnectFree,cbdataFree,cbdataValid
etc so that I can better analyze the problem from my
end. Please adivce on this issue. More detailed log
is given below.

2007/10/04 12:14:19| eventRun: Running
'fwdConnectStart', id 51043
2007/10/04 12:14:19| fwdConnectStart:
http://www.orkut.com/Scrapbook.aspx
2007/10/04 12:14:19| pconnRemoveFD: found FD 1141 at
index 1
2007/10/04 12:14:19| commSetSelect: FD 1141 type 1
2007/10/04 12:14:19| commSetEvents(fd=1141)
2007/10/04 12:14:19| commSetTimeout: FD 1141 timeout
-1
2007/10/04 12:14:19| comm_close: FD 1141
2007/10/04 12:14:19| commCallCloseHandlers: FD 1141
2007/10/04 12:14:19| fd_close FD 1141 www.orkut.com
idle connection
2007/10/04 12:14:19| commSetEvents(fd=1141)
2007/10/04 12:14:19| aclMatchAclList: returning 1
2007/10/04 12:14:19| fwdConnectStart: got addr
221.134.210.253, tos 0
2007/10/04 12:14:19| comm_open: FD 1141 is a new
socket
2007/10/04 12:14:19| fd_open FD 1141
http://www.orkut.com/Scrapbook.aspx
2007/10/04 12:14:19| comm_add_close_handler: FD 1141,
handler=0x807a164, data=0x836f7770
2007/10/04 12:14:19| cbdataLock: 0x836f7770
2007/10/04 12:14:19| commSetTimeout: FD 1141 timeout
30
2007/10/04 12:14:19| commConnectStart: FD 1141,
www.orkut.com:80
2007/10/04 12:14:19| cbdataLock: 0x836f7770
2007/10/04 12:14:19| comm_add_close_handler: FD 1141,
handler=0x80704d3, data=0x35b94900
2007/10/04 12:14:19| cbdataLock: 0x35b94900
2007/10/04 12:14:19| ipcache_nbgethostbyname: Name
'www.orkut.com'.
2007/10/04 12:14:19| ipcache_nbgethostbyname: MISS for
'www.orkut.com'
2007/10/04 12:14:19| cbdataLock: 0x35b94900
2007/10/04 12:14:19| dnsSubmit: queue overload,
rejecting www.orkut.com
2007/10/04 12:14:19| cbdataFree: 0x81c021a0
2007/10/04 12:14:19| cbdataFree: Freeing 0x81c021a0
2007/10/04 12:14:19| ipcacheParse: parsing: {$fail
Temporary network problem, please retry later}
2007/10/04 12:14:19| cbdataValid: 0x35b94900
2007/10/04 12:14:19| commConnectDnsHandle: Unknown
host: www.orkut.com
2007/10/04 12:14:19| comm_remove_close_handler: FD
1141, handler=0x80704d3, data=0x35b94900
2007/10/04 12:14:19| cbdataUnlock: 0x35b94900
2007/10/04 12:14:19| commSetTimeout: FD 1141 timeout
-1
2007/10/04 12:14:19| commConnectFree: FD 1141
2007/10/04 12:14:19| cbdataFree: 0x35b94900
2007/10/04 12:14:19| cbdataFree: 0x35b94900 has 1
locks, not freeing
2007/10/04 12:14:19| cbdataValid: 0x836f7770
2007/10/04 12:14:19| fwdConnectDone: Unknown host:
www.orkut.com
2007/10/04 12:14:19| fwdFail: ERR_DNS_FAIL "Service
Unavailable"
2007/10/04 12:14:19| cbdataFree: 0x32be2e90
2007/10/04 12:14:19| cbdataFree: Freeing 0x32be2e90
2007/10/04 12:14:19| comm_close: FD 1141
2007/10/04 12:14:19| commCallCloseHandlers: FD 1141
2007/10/04 12:14:19| commCallCloseHandlers:
ch->handler=0x807a164
2007/10/04 12:14:19| cbdataValid: 0x836f7770
2007/10/04 12:14:19| fwdServerClosed: FD 1141
http://www.orkut.com/Scrapbook.aspx
2007/10/04 12:14:19| fwdStateFree: 0x836f7770
2007/10/04 12:14:19| storeLockObject: key
'F044E184E2686400C3F899C13FC5733E' count=4
2007/10/04 12:14:19| creating rep: 0xa60609d0
2007/10/04 12:14:19| init-ing hdr: 0xa6060a10 owner: 2
2007/10/04 12:14:19| 0xa6060a10 lookup for 41
2007/10/04 12:14:19| 0xa6060a10 lookup for 9
2007/10/04 12:14:19| 0xa6060a10 lookup for 41
2007/10/04 12:14:19| 0xa6060a10 lookup for 9
2007/10/04 12:14:19| 0xa6060a10 lookup for 25
2007/10/04 12:14:19| errorConvert: %U -->
'http://www.orkut.com/Scrapbook.aspx'
2007/10/04 12:14:19| errorConvert: %U -->
'http://www.orkut.com/Scrapbook.aspx'
2007/10/04 12:14:19| errorConvert: %H -->
'www.orkut.com'
2007/10/04 12:14:19| errorConvert: %z --> 'Temporary
network problem, please retry later'
2007/10/04 12:14:19| errorConvert: %w --> 'webmaster'
2007/10/04 12:14:19| errorConvert: %w --> 'webmaster'
2007/10/04 12:14:19| errorConvert: %T --> 'Thu, 04 Oct
2007 06:44:19 GMT'
2007/10/04 12:14:19| errorConvert: %h --> 'T-CACHE2'
2007/10/04 12:14:19| errorConvert: %s -->
'squid/2.6.STABLE12'
2007/10/04 12:14:19| errorConvert: %S --> '
2007/10/04 12:14:19| created entry 0x1eb778c8:
'Server: squid/2.6.STABLE12'

Thanks and Regards,
Deepak

       
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Received on Thu Oct 04 2007 - 03:36:52 MDT