Losing quorum on 3 node dag with the lose of only 1 node.
We have exchange 2010 latest version and rollups as of June 30, 2014. running on Windows 2008R2 also patched on June 30th. Two nodes in Seattle (primary DC) and 1 node in Spokane (backup DC) active mailboxes are in Seattle site only when running normally.
All 3 servers run MB, CAS and HUB. We are about to LB the CAS on an F5 BigIP box, but that is not in place yet.
We had discovered a few months ago that something is amiss when we were doing updates on the 1 server in Spokane. Normally it would be no issue to suspend replication, patch the server, restart it and resume replication. This would not cause any outages.
Now when we restart that server, or any of the 3 server for that matter, the quorum is lost and the cluster service is terminated on the 2 server that were still up and running when the other was rebooted.
I've been researching this problem and did discover that the 2nd server in Seattle had no vote and have resolved that issue, but the problem continues.
Strangely enough, when looking at Failover cluster Manager, the warning is there next to Quorum configuration that the loss of a node will bring the cluster down, YET when running validation testing, the report says the cluster can survive the failure of
a node. It's contradictory. So we are looking to find out what is the issue. Once the server reboots and is back up, I can manually restart the cluster service on the 2 nodes that were not rebooted and the infrastructure comes up just fine.
However, this is not what a 3 node cluster should do. Any ideas where else to look to resolve this problem?
Thanks. I did remove a few lines that I hope you were not looking for.
some background: Originally this was a 2 node DAG, just in Seattle, a third node was added in Spokane about a year ago. At the 2nd member was sea-mail-02, but it was removed (properly) and sea-mail-03 was added (this was about 5 months ago)
It was not until we did our 3rd DR test that we had some problems getting the DAG to mount in Spokane. We got some help from MS pro support and got things working. Lots of cluster commands were issued in PS and since then, we are having this issue.
RunspaceId : 2b8c2445-86c4-41d9-9bbb-cf5a4196a586
Name : DAGWPI
Servers : {SEA-MAIL-03, SPOK-MAIL-01, SEA-MAIL-01}
WitnessServer : vc-sea01.wpi.com
WitnessDirectory : c:\dagwpiwitness1
AlternateWitnessServer : spok-vc01.wpi.com
AlternateWitnessDirectory : c:\dagwpiwitness1
NetworkCompression : InterSubnetOnly
NetworkEncryption : InterSubnetOnly
DatacenterActivationMode : DagOnly
StoppedMailboxServers : {}
StartedMailboxServers : {sea-mail-01.wpi.com, sea-mail-03.wpi.com, SPOK-MAIL-01.wpi.com}
DatabaseAvailabilityGroupIpv4Addresses : {10.ww.xx.47, 10.yy.zz.47}
DatabaseAvailabilityGroupIpAddresses : {10.ww.xx.47, 10.yy.zz.47}
AllowCrossSiteRpcClientAccess : False
OperationalServers :
PrimaryActiveManager :
ServersInMaintenance :
ServersInDeferredRecovery :
ThirdPartyReplication : Disabled
ReplicationPort : 0
NetworkNames : {}
WitnessShareInUse :
AdminDisplayName :
ExchangeVersion : 0.10 (14.0.100.0)
DistinguishedName : CN=DAGWPI,CN=Database Availability Groups,CN=Exchange
WhenChanged : 6/29/2014 1:46:45 PM
WhenCreated : 12/27/2012 12:15:49 PM
WhenChangedUTC : 6/29/2014 8:46:45 PM
WhenCreatedUTC : 12/27/2012 8:15:49 PM
OrganizationId :
OriginatingServer : sea-dc01.internal.westernpeterbilt.com
IsValid : True
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