Re: 'yum update' error - Cannot retrieve repository metadata

I ran 'urlgrabber 
http://mirror.bytemark.co.uk/centos/5/os/x86_64/repodata/repomd.xml' and got 
the output:

Traceback (most recent call last):
  File "/usr/bin/urlgrabber", line 124, in ?
    main()
  File "/usr/bin/urlgrabber", line 120, in main
    filename = urlgrab(url,filename=file,**kwargs)
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 602, 
in urlgrab
    return default_grabber.urlgrab(url, filename, **kwargs)
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 934, 
in urlgrab
    return self._retry(opts, retryfunc, url, filename)
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 852, 
in _retry
    r = apply(func, (opts,) + args, {})
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 920, 
in retryfunc
    fo = URLGrabberFileObject(url, filename, opts)
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1008, 
in __init__
    self._do_open()
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1091, 
in _do_open
    fo, hdr = self._make_request(req, opener)
  File "/usr/lib/python2.4/site-packages/urlgrabber/grabber.py", line 1220, 
in _make_request
    raise URLGrabError(4, _('IOError: %s') % (e, ))
urlgrabber.grabber.URLGrabError: [Errno 4] IOError: <urlopen error (110, 
'Connection timed out')>

What does this exactly mean?

--------------------------------------------------
From: "Seth Vidal" <[email protected]>
Sent: Monday, September 14, 2009 5:14 PM
To: "Yellowdog Updater, Modified" <[email protected]>
Subject: Re: [Yum] 'yum update' error - Cannot retrieve repository metadata

>
>
> On Mon, 14 Sep 2009, Andrew Wheal wrote:
>
>> I have run the command 'tcpdump -w tcpdump.txt | yum update' and then i 
>> used 'tcpdump -r tcpdump.txt' to get the results, below:
>>
>> reading from file tcpdump.txt, link-type EN10MB (Ethernet)
>> 12:39:09.221619 arp who-has mygateway.ar7 tell sicoserver
>> 12:39:09.225138 arp reply mygateway.ar7 is-at 00:14:6c:10:6e:da (oui 
>> Unknown)
>> 12:39:09.225145 IP sicoserver.35396 > mygateway.ar7.domain:  36584+ AAAA? 
>> mirror.bytemark.co.uk. (39)
>> 12:39:09.267061 IP mygateway.ar7.domain > sicoserver.35396:  36584 0/0/0 
>> (39)
>> 12:39:09.267140 IP sicoserver.39452 > mygateway.ar7.domain:  9735+ AAAA? 
>> mirror.bytemark.co.uk. (39)
>> 12:39:09.272099 IP mygateway.ar7.domain > sicoserver.39452:  9735- 1/0/0 
>> (39)
>> 12:39:09.272166 IP sicoserver.35949 > mygateway.ar7.domain:  9418+ A? 
>> mirror.bytemark.co.uk. (39)
>> 12:39:09.276625 IP mygateway.ar7.domain > sicoserver.35949:  9418- 1/0/0 
>> A[|domain]
>> 12:39:09.276778 IP sicoserver.36733 > 1.0.0.0.http: S 
>> 509686349:509686349(0) win 5840 <mss 1460,sackOK,timestamp 220963 
>> 0,nop,wscale 7>
>> 12:39:12.276614 IP sicoserver.36733 > 1.0.0.0.http: S 
>> 509686349:509686349(0) win 5840 <mss 1460,sackOK,timestamp 223963 
>> 0,nop,wscale 7>
>> 12:39:14.256873 arp who-has sicoserver tell mygateway.ar7
>> 12:39:14.256880 arp reply sicoserver is-at 00:18:f3:67:f7:fe (oui 
>> Unknown)
>> 12:39:18.276669 IP sicoserver.36733 > 1.0.0.0.http: S 
>> 509686349:509686349(0) win 5840 <mss 1460,sackOK,timestamp 229963 
>> 0,nop,wscale 7>
>> 12:39:28.475768 IP 192.168.0.7.plysrv-https > 
>> 239.192.152.143.plysrv-https: UDP, length 119
>> 12:39:30.276781 IP sicoserver.36733 > 1.0.0.0.http: S 
>> 509686349:509686349(0) win 5840 <mss 1460,sackOK,timestamp 241963 
>> 0,nop,wscale 7>
>> 12:39:35.276821 arp who-has mygateway.ar7 tell sicoserver
>> 12:39:35.278773 arp reply mygateway.ar7 is-at 00:14:6c:10:6e:da (oui 
>> Unknown)
>> 12:40:10.367175 IP 192.168.0.7.netbios-dgm > 192.168.0.255.netbios-dgm: 
>> NBT UDP PACKET(138)
>>
>> A lot of this doesn't make sense to me, but I can work out that packets 
>> are being sent to and from my server.  What looks strange to me though is 
>> that my server has tried to send packets to "1.0.0.0.http"? Should this 
>> not be a valid IP address?
>>
>> My 'yum.conf' file has no reference to neither throttle nor bandwidth. 
>> Here is the contents of my file, incase there is something wrong with it:
>>
>
>
> take the baseurl of the site you cannot connect to and run:
>
> urlgrabber $thaturl/repodata/repomd.xml
>
> see what it says.
>
> -sv
>
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