Name resolution problem in server, help!

Discussion in 'Site & Server Administration' started by trustjon, May 5, 2011.

  1. #1
    Hello All,

    There might me some problem in the server. I get this error when I try to wget something:

    --------------------------------------------------------------------------------
    wget http://yum.chrislea.com/centos/5/i386/sqlite-devel-3.6.17-1.i386.rpm
    http://yum.chrislea.com/centos/5/i386/sqlite-devel-3.6.17-1.i386.rpm:
    [Errno 4] IOError: <urlopen error (-3, 'Temporary failure in name
    resolution')>
    Trying other mirror.

    Error Downloading Packages:
    sqlite-devel-3.6.17-1.i386: failure: sqlite-devel-3.6.17-1.i386.rpm
    from chl: [Errno 256] No more mirrors to try.
    --------------------------------------------------------------------------------

    This is the problem in most of the cases. Sometimes wget,ping, etc. works but most of the time it creates problems.

    Can anyone tell why this is happening and is there a solution to it.

    Thanks.
     
    trustjon, May 5, 2011 IP
  2. hans

    hans Well-Known Member

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    #2
    as the error says
    "Temporary failure in name resolution"
    the problem is of temporary nature and has nothing to do with site directly nor with your PC unless you run your OWN NS server in your own box as I do since 10 years.

    this error may by because your ISP's NS may be temporarily unavailable, down for maintenance or other similar reasons
    try to figure out where exactly the problem is
    for example by using different ISP if you can
    use your home ISP vs any public wifi hotspot or mobile ISP to compare if same problem or success to pin point possible root cause of problem

    or using other DNS if you can locally configure ( you could temporarily use any of the public NS such as the Google operated public NS 8.8.8.8 )

    if you have a Linux box at home, test name resolution
    dig yum.chrislea.com
    if no result
    then test same query using a.m. public Google NS
    dig @8.8.8.8 yum.chrislea.com

    many years back a major national ISP had substantial parts of IPs from a major host missing = empty pages or site not fond errors

    if it is your ISP after multiple tests
    may be you directly contact ISP and make aware of issue
     
    hans, May 17, 2011 IP