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LouisRuth-3980 asked ZhengqiLou-MSFT commented

exchange database have automatic switch over

the event log as below

A request to mount Active or Passive database was processed in 0.0214939 seconds.

Flags: 0x00000008
Error code: NoError (0x00000000)

Information Store - (47140,R,0,15.01.1779.002) The database engine has begun replaying logfile E:\Program Files\Microsoft\Exchange Server\V15\Mailbox\database\E04.log.


Previous Log Processing Stats:
[1] 395.168726 -2.929166 (1584) CM +J(CM:1584, PgRf:329433, Rd:3696/31, Dy:3782/520119, Lg:139787869/556120) +M(C:1341976K, Fs:237443, WS:363016K # 348824K, PF:1381028K # 1367372K, P:1381028K).


Then run a log to copy to E drive
“Information Store - MBX - Senior01 (47140,R,0,15.01.1779.002) MBX - Senior01: The database engine has begun replaying logfile E:\Program Files\Microsoft\Exchange Server\V15. “

how to avoid this status , because when failover to other database , around 1 hr the database will auto switch to original database and mounted back

is it the right not good or other possible reason

it is too trouble because the status happen the user outlook will no response and hang

[1]: /answers/storage/attachments/65207-image.png

office-exchange-server-administration
image.png (48.4 KiB)
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LouisRuth-3980 avatar image
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LouisRuth-3980 answered ZhengqiLou-MSFT commented

Scenario: GetKillBit. Failed to download killbit list from OMEX server. Exception: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at Microsoft.Exchange.Data.ApplicationLogic.Extension.BaseAsyncOmexCommand.<>c_DisplayClass18_0.<EndGetResponseCallback>b_0()


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have any advise

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Hi,

Add these values to Registry may fix this error:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft.NETFramework\v4.0.30319]
"SystemDefaultTlsVersions"=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft.NETFramework\v4.0.30319]
"SystemDefaultTlsVersions"=dword:00000001

Here is a related thread: https://social.technet.microsoft.com/Forums/zh-CN/d6e295cb-e6f1-4136-af76-ebbc51859968/receiving-quotsomething-went-wrongquot-and-quotthe-app-couldnt-be-downloadedquot-messages?forum=Exch2016GD

Regards,
Lou

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LouisRuth-3980 avatar image
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LouisRuth-3980 answered LouisRuth-3980 commented

event 1146 The cluster Resource Hosting Subsystem (RHS) process was terminated and will be restarted. This is typically associated with cluster health detection and recovery of a resource. Refer to the System event log to determine which resource and resource DLL is causing the issue.

event id 1177
The Cluster service is shutting down because quorum was lost. This could be due to the loss of network connectivity between some or all nodes in the cluster, or a failover of the witness disk.
Run the Validate a Configuration wizard to check your network configuration. If the condition persists, check for hardware or software errors related to the network adapter. Also check for failures in any other network components to which the node is connected such as hubs, switches, or bridges.

have make cluster node two host restart last night ?

do you advise to create a new cluster for solve this issue?



event id 1135
Cluster node 'exg01' was removed from the active failover cluster membership. The Cluster service on this node may have stopped. This could also be due to the node having lost communication with other active nodes in the failover cluster. Run the Validate a Configuration wizard to check your network configuration. If the condition persists, check for hardware or software errors related to the network adapters on this node. Also check for failures in any other network components to which the node is connected such as hubs, switches, or bridges.

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Hi @LouisRuth-3980 ,

Sorry for the delay of this reply.
Event 1135: this says the exchange server exg01 was removed from a DAG.
Event 1177: this may caused by serval reasons, Event ID - 1177.
Event 1146: Event ID 1146 — Cluster Service Startup, seems like the DLL files caused this event.

Did you just removed a server from the DAG? I think you can ignore these events for now and remove all members then delete the DAG. After that you can recreate the DAG and add members to test if the automatically switch stops.

Regards,
Lou

0 Votes 0 ·

but this event will make the exchange server auto reboot?


DAG and cluster recreate need require estimate down time and its change will affect user?
it is most concern point.

0 Votes 0 ·

Hi,

I think this event was created after the server was rebooted or was rebooting.

No, if you just remove & recreate a DAG or remove a member of this DAG, it won't affect users.

Regards,
Lou

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LouisRuth-3980 answered ZhengqiLou-MSFT commented

Get-Cluster | Get-ClusterNode | Select Name,DynamicWeight,NodeWeight,Id,State

Name : a
DynamicWeight : 1
NodeWeight : 1
Id : 1
State : Up

Name : b
DynamicWeight : 1
NodeWeight : 1
Id : 2
State : Up

Name : c
DynamicWeight : 1
NodeWeight : 1
Id : 3
State : Up


status is up , do you i can test remove one of exchange and re-add to DAG group

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Hi @LouisRuth-3980 ,

I deleted the above post to make it looks clearer.
Sorry, do you mean you want to test this? And what do you want to know or others?
Based on my test, if you remove one of the servers, the witness server would be re-enabled.
It's not like you stopped a server(Stop-ClusterNode) but not remove it. In this case, the witness server will still be disabled.

Could you tell me our original issue: exchange database have automatic switch over, does is fixed? If so you could close this thread by accepting one answer and post a new thread for other questions. Basically we solve one issue in one thread. Thanks for understanding. Also please feel free to goon if this issue is still there, I would follow this until it's resolved:)

Regards,
Lou

0 Votes 0 ·

exchange database have automatic switch over
automatic switch over is still not solved , now i power off one server to avoid exchange failover to other exchange , so i have study have re-build DAG and cluster to solve the problem


you remove one of the servers, the witness server would be re-enabled.

83034-image.png



do you i remove one of server and add back , will make the witness enable ?

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image.png (8.5 KiB)

Hi @LouisRuth-3980 ,

Oh sorry for that, truly I mean.

As I know and my tests, we could see the following situations:
1. Two servers are in the DAG, then the witness server could be enabled and you could use (Get-Cluster).witnessDynamicWeight to check.
2. Three servers are in the DAG, the witness server is disabled whatever you do like stopping one or two servers with Stop-ClusterNode ServerName.
I may guess even servers could be the same with scenario 1 and odd with scenario 2.

Best regards,
Lou


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