Solved

Exchange 2010  DAG database status stays at 'Mounting' when failing over?

Posted on 2014-07-29
6
3,816 Views
Last Modified: 2014-08-01
We have an Exchange 2010 Enterprise environment with DAG setup (12 databases).  When trying to activate the database copy to the other mailbox server in the DAG, one of the databases copy status stays at 'Mounting'.  I am able to activate all other databases to the secondary server.  In the event viewer I notice event ID 104, MSExchange Search Indexer message: Exchange Search Indexer failed to enable the Mailbox Database "ABC" (BUID ###################) after 10 tries.  The last failure was: MapiExceptionMDBOffline: Unable to get CI watermark (hr=0x800004005, ec=1142).
I tried restarting the Exchange Search Indexer service, but that didn't help.  I was able to break the cycle by failing back this database to the original Mailbox server and rebooting the secondary mailbox server.  I would like to run a repair on this one database to make sure it is stable.  Can I bring down just one database without shutting down the whole Information Store?
thank you,
0
Comment
Question by:trinity2007
  • 3
  • 2
6 Comments
 
LVL 63

Expert Comment

by:Simon Butler (Sembee)
ID: 40227742
I don't think it is the database, but the search index. I would start by resetting that for the specific database. Wait until get-databaseavailabilitygroup -Status returns healthy for the index state before trying again.

Simon.
0
 

Author Comment

by:trinity2007
ID: 40228032
What would the command be for resetting the search index for a database?
0
 
LVL 7

Expert Comment

by:Murali Reddy
ID: 40228811
There is a readymade script available in your installation directory, scrpits folder. Something like..

ResetSearchIndex.ps1 [-force]  "dbname"

It will restart the search indexer service.

To verify that the rebuilding of the index has completed,
Add the perfmon counter- MSExchange Search Indices\Full Crawl Mode Status. This counter will be 0 before running ResetSearchIndex, go to 1 during the full crawl and then back to 0 after ResetSearchIndex completes.
Check for MSExchange Search Indexer Events109 & 110 when the full crawl begins and ends.
0
Does Powershell have you tied up in knots?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

 

Author Comment

by:trinity2007
ID: 40228964
After waiting about 20 minutes, the database mounted.  Tried doing a failover, but mail wasn't routing correctly, so reverted back to original setup.  However, when failing over the same database encountered the same issue, but this time it took longer to mount.    I've inherited this and I believe there are several misconfigurations within the DAG setup.  I'm finding out now that the failover never really worked to begin with.  I may end up either calling Microsoft, or start from scratch.  I'll go ahead and try your recommendations and see if that helps at least with the database side of things.
Thank you,
0
 
LVL 63

Accepted Solution

by:
Simon Butler (Sembee) earned 500 total points
ID: 40230073
If the failover isn't working, I wouldn't bother with fixing it.
Simply remove the copy, remove the DAG and do it again properly with a full seed. You can then delete the copies of the database and index on the other side.

Ensure that both servers are on exactly the same patch version, as that can cause problems like you are seeing.

Simon.
0
 

Author Comment

by:trinity2007
ID: 40232855
Yes, we are in the process of doing that.  Thank you for your assistance!
0

Featured Post

Complete VMware vSphere® ESX(i) & Hyper-V Backup

Capture your entire system, including the host, with patented disk imaging integrated with VMware VADP / Microsoft VSS and RCT. RTOs is as low as 15 seconds with Acronis Active Restore™. You can enjoy unlimited P2V/V2V migrations from any source (even from a different hypervisor)

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This process describes the steps required to Import and Export data from and to .pst files using Exchange 2010. We can use these steps to export data from a user to a .pst file, import data back to the same or a different user, or even import data t…
Learn to move / copy / export exchange contacts to iPhone without using any software. Also see the issues in configuration of exchange with iPhone to migrate contacts.
In this video we show how to create a Distribution Group in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >>…
In this video we show how to create an Address List in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Organization >> Ad…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

23 Experts available now in Live!

Get 1:1 Help Now