Description of problem:

Hi


I am getting a python exception from up2date if name resolution.
up2date should fail with a better error that explains the failure. 


Version-Release number of selected component (if applicable):

up2date-4.3.19-1.i386.rpm


How reproducible:

Everytime

Steps to Reproduce:
1. Run up2date on a system where name resolution fails. try without
/etc/resolv.conf filled out for reproducing this
2. You will get a python error saying that name resolution has failed
3. I have pasted the traceback below
    
  
Actual results:
Traceback (most recent call last):
  File "/usr/sbin/up2date", line 1271, in ?
    sys.exit(main() or 0)
  File "/usr/sbin/up2date", line 799, in main
    fullUpdate, dryRun=options.dry_run))
  File "/usr/sbin/up2date", line 1147, in batchRun
    batch.run()
  File "/usr/share/rhn/up2date_client/up2dateBatch.py", line 62, in run
    self.__findPackagesToUpdate()
  File "/usr/share/rhn/up2date_client/up2dateBatch.py", line 97, in
__findPackagesToUpdate
    plist.addGlobs(self.listOfGlobs)
  File "/usr/share/rhn/up2date_client/packageList.py", line 157, in
addGlobs
    availList = rhnPackageInfo.getAvailablePackageList()
  File "/usr/share/rhn/up2date_client/rhnPackageInfo.py", line 219, in
getAvailablePackageList
    package_list = availablePackageList(
  File "/usr/share/rhn/up2date_client/rhnPackageInfo.py", line 153, in
availablePackageList
    progressCallback = progressCallback)
  File "/usr/share/rhn/up2date_client/rpcServer.py", line 112, in doCall
    ret = apply(method, args, kwargs)
  File "/usr/share/rhn/up2date_client/repoDirector.py", line 20, in
listPackages
    return self.handlers[channel['type']].listPackages(channel,
msgCallback, progressCallback)
  File "/usr/share/rhn/up2date_client/rpmSource.py", line 226, in
listPackages
    msgCallback, progressCallback)
  File "/usr/share/rhn/up2date_client/repoBackends/yumRepo.py", line
201, in listPackages
    agent = "Up2date %s/Yum" % up2dateUtils.version())
  File "/usr/share/rhn/up2date_client/repoBackends/urlUtils.py", line
324, in fetchUrl
    endRange=end)
  File "/usr/share/rhn/up2date_client/repoBackends/urlUtils.py", line
117, in open_resource
    return opener.open(request)
  File "/usr/lib/python2.2/urllib2.py", line 328, in open
    '_open', req)
  File "/usr/lib/python2.2/urllib2.py", line 307, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.2/urllib2.py", line 824, in http_open
    return self.do_open(httplib.HTTP, req)
  File "/usr/lib/python2.2/urllib2.py", line 809, in do_open
    raise URLError(err)
urllib2.URLError: <urlopen error (-3, 'Temporary failure in name
resolution')>


Expected results:

Should try to recover or fail with a better error message describing
the problem.Traceback should NOT be shown

Additional info:

uname -a
Linux rme1022 2.4.22-1.2115.nptl #1 Wed Oct 29 15:42:51 EST 2003 i686
i686 i386 GNU/Linux

cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Pentium(R) 4 CPU 2.66GHz
stepping        : 9
cpu MHz         : 2680.427
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips        : 5347.73


rpm -q python
python-2.2.3-7