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Thread: EventID 4521 warning after SP2 upgrade

  1. #1
    Ron Guest

    EventID 4521 warning after SP2 upgrade

    After installing SP2 via WSUS, both of my DNS servers started to register
    EventID 4521, error 9002. Description: The DNS server encountered error 9002
    attempting to load zone . from Active Directory. The DNS server will attempt
    to load this zone again on the next timeout cycle.

    Updates to the three zones I have seem to be showing up on both servers so I
    don't know which zone isn't loading. I don't think the error message knows
    either, it's probably suppost to display the zone name in the description.

  2. #2
    Danny Sanders Guest

    Re: EventID 4521 warning after SP2 upgrade

    The DNS server encountered error 9002
    > attempting to load zone . from Active Directory. The DNS server will
    > attempt
    > to load this zone again on the next timeout cycle.



    It may be talking about the "." (dot) forward lookup zone that is created by
    default and in most DNS setups is deleted to prevent the DNS server from
    thinking it's a root server and allowing forwarders to be set up.


    See How to Remove the Root DNS Zone in this article:
    http://support.microsoft.com/kb/323380/en-us

    hth
    DDS


    "Ron" <ron-awa@community.nospam> wrote in message
    news:A3D8B4EE-C8E8-42A2-8FA4-23BD3CD450EA@microsoft.com...
    > After installing SP2 via WSUS, both of my DNS servers started to register
    > EventID 4521, error 9002. Description: The DNS server encountered error
    > 9002
    > attempting to load zone . from Active Directory. The DNS server will
    > attempt
    > to load this zone again on the next timeout cycle.
    >
    > Updates to the three zones I have seem to be showing up on both servers so
    > I
    > don't know which zone isn't loading. I don't think the error message knows
    > either, it's probably suppost to display the zone name in the description.




  3. #3
    Ron Guest

    Re: EventID 4521 warning after SP2 upgrade

    Danny,

    Thanks for the suggestion. I checked and I don't have a "." zone in my
    Forward Lookup Zones. I also checked with ADSI Edit.

    - Ron



    "Danny Sanders" wrote:

    > The DNS server encountered error 9002
    > > attempting to load zone . from Active Directory. The DNS server will
    > > attempt
    > > to load this zone again on the next timeout cycle.

    >
    >
    > It may be talking about the "." (dot) forward lookup zone that is created by
    > default and in most DNS setups is deleted to prevent the DNS server from
    > thinking it's a root server and allowing forwarders to be set up.
    >
    >
    > See How to Remove the Root DNS Zone in this article:
    > http://support.microsoft.com/kb/323380/en-us
    >
    > hth
    > DDS
    >



  4. #4
    Mike Luo [MSFT] Guest

    Re: EventID 4521 warning after SP2 upgrade

    Hello Ron,

    Thank you for using newsgroup!

    This problem may be caused by the corrupt DNS zone. I recommend you
    re-create the DNS zone, please refer to the following KB to perform this:

    How to reinstall a dynamic DNS Active Directory-integrated zone
    http://support.microsoft.com/kb/294328/en-us

    If this method can't solve the problem, please let me know the following
    information so that I'm able to understand your situation more clearly:

    1. What is the OS version of the DNS Server.
    2. Save Sysem event log, Dns event log, Application event log to .evt file
    and post these files in newsgroup.

    Thanks & Regards,

    Mike Luo

    Microsoft Online Partner Support
    Get Secure! - www.microsoft.com/security

    =====================================================
    When responding to posts, please "Reply to Group" via your newsreader so
    that others may learn and benefit from your issue.
    =====================================================
    This posting is provided "AS IS" with no warranties, and confers no rights.


  5. #5
    Ron Guest

    Re: EventID 4521 warning after SP2 upgrade

    Mike,

    Thanks. It took a couple of days to carefully move both servers to
    non-AD-integrated DNS and then back to integrated AD, but that fixed the
    problem. Fortunately I didn't need to delete the text-based zone info as the
    KB article directed so I didn't lose any important DNS records (MX, CNAME,
    etc.).

    Regards,

    Ron

    "Mike Luo [MSFT]" wrote:

    > Hello Ron,
    >
    > Thank you for using newsgroup!
    >
    > This problem may be caused by the corrupt DNS zone. I recommend you
    > re-create the DNS zone, please refer to the following KB to perform this:
    >
    > How to reinstall a dynamic DNS Active Directory-integrated zone
    > http://support.microsoft.com/kb/294328/en-us
    >
    > If this method can't solve the problem, please let me know the following
    > information so that I'm able to understand your situation more clearly:
    >
    > 1. What is the OS version of the DNS Server.
    > 2. Save Sysem event log, Dns event log, Application event log to .evt file
    > and post these files in newsgroup.
    >
    > Thanks & Regards,
    >
    > Mike Luo
    >
    > Microsoft Online Partner Support
    > Get Secure! - www.microsoft.com/security
    >
    > =====================================================
    > When responding to posts, please "Reply to Group" via your newsreader so
    > that others may learn and benefit from your issue.
    > =====================================================
    > This posting is provided "AS IS" with no warranties, and confers no rights.
    >
    >


  6. #6
    Mike Luo [MSFT] Guest

    Re: EventID 4521 warning after SP2 upgrade

    Hello Ron ,

    Thank you for the confirm. Glad to know that everyting is OK now. It is my
    pleasure to be of assistance.

    Mike Luo

    Microsoft Online Partner Support
    Get Secure! - www.microsoft.com/security

    =====================================================
    When responding to posts, please "Reply to Group" via your newsreader so
    that others may learn and benefit from your issue.
    =====================================================
    This posting is provided "AS IS" with no warranties, and confers no rights.


  7. #7
    Ron Guest

    Re: EventID 4521 warning after SP2 upgrade

    The problem re-appeared after the DNS servers rebooted from installing the
    latest WSUS updates (KB925902). This was the first time the DNS service was
    restarted since I fixed the problem. By using DNSCMD, I found out that the .
    zone is the DNS cache and that it was AD-integrated (/ZoneInfo). Things I
    tried that didn't work: clearing the cache and deleting the RootDNS object
    from AD.

    What finally worked: changing the "Load zone data on startup" from AD +
    registry to just registry. Now DNSCMD /ZoneInfo tells me that the cache is no
    longer AD-integrated but file based which will probably be okay with me.


  8. #8
    Mike Luo [MSFT] Guest

    Re: EventID 4521 warning after SP2 upgrade

    Hi Ron,

    Great experience sharing! Hope to hear from you again in newsgroup.

    Have a nice day!

    Mike Luo

    Microsoft Online Partner Support
    Get Secure! - www.microsoft.com/security

    =====================================================
    When responding to posts, please "Reply to Group" via your newsreader so
    that others may learn and benefit from your issue.
    =====================================================
    This posting is provided "AS IS" with no warranties, and confers no rights.


  9. #9
    Jonathan Huber Guest

    Re: EventID 4521 warning after SP2 upgrade

    I am seeing the same DNS Event ID 4521 problem. In my case the AD-integrated
    zone in question is at a customer who has their external (real) domain in use
    as the AD domain (Pre-existing setup - I didn't do it!). All was well enough
    before SP2. I am a bit concerned about the recommendation to change from
    "from active directory and registry" to "registry". What exactly is this
    going to do? What will I lose if I make this change? The environment has 2
    AD servers and workstations that of course are set to register in DNS.

  10. #10
    Kevin Guest

    Re: EventID 4521 warning after SP2 upgrade

    Hi
    I have Event ID 4521 after SP2 upgrade one of my servers. I did not install
    it on others.
    The DNS server encountered error 9002 attempting to load zone . from Active
    Directory. The DNS server will attempt to load this zone again on the next
    timeout cycle. This can be caused by high Active Directory load and may be a
    transient condition.

    Heeeeeeeeeeeeeeeeeeeelp!
    Thanks
    Kevin

    "Jonathan Huber" <JonathanHuber@discussions.microsoft.com> wrote in message
    news:89427F37-62B3-43EA-88B3-E92B5B49DBC5@microsoft.com...
    >I am seeing the same DNS Event ID 4521 problem. In my case the
    >AD-integrated
    > zone in question is at a customer who has their external (real) domain in
    > use
    > as the AD domain (Pre-existing setup - I didn't do it!). All was well
    > enough
    > before SP2. I am a bit concerned about the recommendation to change from
    > "from active directory and registry" to "registry". What exactly is this
    > going to do? What will I lose if I make this change? The environment has
    > 2
    > AD servers and workstations that of course are set to register in DNS.




  11. #11
    Join Date
    Mar 2006
    Posts
    1
    Quote Originally Posted by Ron View Post
    The problem re-appeared after the DNS servers rebooted from installing the
    latest WSUS updates (KB925902). This was the first time the DNS service was
    restarted since I fixed the problem. By using DNSCMD, I found out that the .
    zone is the DNS cache and that it was AD-integrated (/ZoneInfo). Things I
    tried that didn't work: clearing the cache and deleting the RootDNS object
    from AD.

    What finally worked: changing the "Load zone data on startup" from AD +
    registry to just registry. Now DNSCMD /ZoneInfo tells me that the cache is no
    longer AD-integrated but file based which will probably be okay with me.
    I used the following the my two AD DNS servers at my Domain Core.
    DNSCMD /ZoneInfo . <----- The root (not needed for AD)
    I saw it was indeed DS intergrated. So I did the following
    DNSCMD /Config . /Bootmethod
    This makes only that Zone a file load on boot. The below is from MS Technet.

    /bootmethod[ 0|1|2|3]
    Determines the source from which the DNS server gets its configuration information. ValueDescription0No source.1Loads from the BIND file that is located in the DNS directory; by default, %systemroot%\System32\DNS..2Loads from the registry.3Loads from Active Directory and the registry. This is the default setting.

    Did this on both of the server having the problem and it is now fixed. No more events.

    Hope that helps.

  12. #12
    Jonathan Huber Guest

    Re: EventID 4521 warning after SP2 upgrade

    Any help with this? Anyone? Is it safe to make the recommended change from
    "from active directory and registry" to "registry" in my scenario where the
    real external domain and internal AD domain are the same?

    "Jonathan Huber" wrote:

    > I am seeing the same DNS Event ID 4521 problem. In my case the AD-integrated
    > zone in question is at a customer who has their external (real) domain in use
    > as the AD domain (Pre-existing setup - I didn't do it!). All was well enough
    > before SP2. I am a bit concerned about the recommendation to change from
    > "from active directory and registry" to "registry". What exactly is this
    > going to do? What will I lose if I make this change? The environment has 2
    > AD servers and workstations that of course are set to register in DNS.


  13. #13
    Kevin Guest

    Re: EventID 4521 warning after SP2 upgrade

    Hi
    I exchecuted:
    dnscmd /config /BootMethod
    and it works. I have not errors in log now
    Thanks
    Kevin
    >
    > Ron;2730340 Wrote:
    >> The problem re-appeared after the DNS servers rebooted from installing
    >> the
    >> latest WSUS updates (KB925902). This was the first time the DNS service
    >> was
    >> restarted since I fixed the problem. By using DNSCMD, I found out that
    >> the .
    >> zone is the DNS cache and that it was AD-integrated (/ZoneInfo). Things
    >> I
    >> tried that didn't work: clearing the cache and deleting the RootDNS
    >> object
    >> from AD.
    >>
    >> What finally worked: changing the "Load zone data on startup" from AD
    >> +
    >> registry to just registry. Now DNSCMD /ZoneInfo tells me that the cache
    >> is no
    >> longer AD-integrated but file based which will probably be okay with
    >> me.

    >
    > I used the following the my two AD DNS servers at my Domain Core.
    > DNSCMD /ZoneInfo . <----- The root (not needed for AD)
    > I saw it was indeed DS intergrated. So I did the following
    > DNSCMD /Config . /Bootmethod
    > This makes only that Zone a file load on boot. The below is from MS
    > Technet.
    >
    > /bootmethod[ 0|1|2|3]
    > Determines the source from which the DNS server gets its configuration
    > information. ValueDescription0No source.1Loads from the BIND file that
    > is located in the DNS directory; by default,
    > %systemroot%\System32\DNS..2Loads from the registry.3Loads from Active
    > Directory and the registry. This is the default setting.
    >
    > Did this on both of the server having the problem and it is now fixed.
    > No more events.
    >
    > Hope that helps.
    >
    >
    > --
    > fireater
    > ------------------------------------------------------------------------
    > fireater's Profile: http://forums.techarena.in/member.php?userid=14440
    > View this thread: http://forums.techarena.in/showthread.php?t=708923
    >
    > http://forums.techarena.in
    >




  14. #14
    rpremuz@yahoo.com Guest

    Re: EventID 4521 warning after SP2 upgrade

    On May 7, 1:57 pm, "Kevin" <k...@yahoo.com> wrote:
    > Hi
    > I executed:
    > dnscmd /config /BootMethod
    > and it works. I have not errors in log now


    Thanks, Kevin. This really works!

    BTW, the output of the command says:
    Registry property BootMethod successfully reset.

    -- rpr. /Robert Premuz/


  15. #15
    ken Guest

    Re: EventID 4521 warning after SP2 upgrade

    The error wasn't shown after i run the command

    But when i reboot the server, the error still appear again

    Does anyone meet it like me ??

    "rpremuz@yahoo.com" wrote:

    > On May 7, 1:57 pm, "Kevin" <k...@yahoo.com> wrote:
    > > Hi
    > > I executed:
    > > dnscmd /config /BootMethod
    > > and it works. I have not errors in log now

    >
    > Thanks, Kevin. This really works!
    >
    > BTW, the output of the command says:
    > Registry property BootMethod successfully reset.
    >
    > -- rpr. /Robert Premuz/
    >
    >


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