Hi all,
In my environment I have 2 Exchange server 2013 (CAS + Mailbox Role both) CU2 : EX01 & EX02 in DAG01. Sometimes CAS service is restarted or Mailbox Database copy on Exchange servers is dismounted unexpectedly. For example today:
I have "Mailbox Database 01" copies on EX01 & EX02
Get-MailboxDatabaseCopyStatus "Mailbox Database 01" Name Status Mailbox Database 01\EX01 Healthy Mailbox Database 01\EX02 Mounted
"Mailbox Database 01" copy on EX02 is dismounted, of course the other copy on EX01 is mounted automatically
Log Name: Application
Source: MSExchangeRepl
Date: 4/3/2015 2:32:19 PM
Event ID: 2153
Task Category: Service
Level: Error
Keywords: Classic
User: N/A
Computer: EX02.mydomain.com
Description:
The log copier was unable to communicate with server 'EX01.mydomain.com'. The copy of database 'Mailbox Database 01\EX02' is in a disconnected state. The communication error was: An error occurred while communicating with server 'EX01'. Error: Unable to read data from the transport connection: An established connection was aborted by the software in your host machine. The copier will automatically retry after a short delay.
CAS service on EX01 , The Microsoft Exchange Mailbox Assistants service on EX02 are restarted
Log Name: System Source: Service Control Manager Date: 4/3/2015 3:25:49 PM Event ID: 7031 Task Category: None Level: Error Keywords: Classic User: N/A Computer: EX01.mydomain.com Description: The Microsoft Exchange RPC Client Access service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 5000 milliseconds: Restart the service. Log Name: System Source: Service Control Manager Date: 4/3/2015 3:25:51 PM Event ID: 7036 Task Category: None Level: Information Keywords: Classic User: N/A Computer: EX01.mydomain.com Description: The Microsoft Exchange RPC Client Access service entered the running state. Log Name: System Source: Service Control Manager Date: 4/3/2015 3:25:54 PM Event ID: 7032 Task Category: None Level: Error Keywords: Classic User: N/A Computer: EX01.mydomain.com Description: The Service Control Manager tried to take a corrective action (Restart the service) after the unexpected termination of the Microsoft Exchange RPC Client Access service, but this action failed with the following error: An instance of the service is already running. Log Name: System Source: Service Control Manager Date: 4/3/2015 3:30:28 PM Event ID: 7031 Task Category: None Level: Error Keywords: Classic User: N/A Computer: EX02.mydomain.com Description: The Microsoft Exchange Mailbox Assistants service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 5000 milliseconds: Restart the service. Log Name: System Source: Service Control Manager Date: 4/3/2015 3:30:30 PM Event ID: 7036 Task Category: None Level: Information Keywords: Classic User: N/A Computer: EX02.mydomain.com Description: The Microsoft Exchange Mailbox Assistants service entered the running state. Log Name: System Source: Service Control Manager Date: 4/3/2015 3:30:33 PM Event ID: 7032 Task Category: None Level: Error Keywords: Classic User: N/A Computer: EX02.mydomain.com Description: The Service Control Manager tried to take a corrective action (Restart the service) after the unexpected termination of the Microsoft Exchange Mailbox Assistants service, but this action failed with the following error: An instance of the service is already running.
On EX01 I can see many 1309 , 2009 , 6002 , 4999 in Event Viewer on both servers, and they just used half of RAM
I'm going to upgrade to SP1 this weekend but please help me to figure out really reason of this issue, limit of max connections on Exchange/Window server , or Disk IO or something ?
Thanks for your help.