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    I've got a really strange issue on one of my exchange servers that hosts DB copies. 

    It seems that every 30 minutes the copy is going to initialized state. The logs are really interesting. 

    ---

    In Apps and Services > Microsoft > Exchange > MailboxDatabaseFailureItems > Operational, there is an informational log:

    Information, Date, MailboxDatabaseFailureItems, 1, Store

    Failure Item (Namespace=1, Tag=16, Database=...)

    ---

    In Apps and Services > Microsoft > Exchange > High Availability > Operational, there are a couple logs:

    Information, Date, HighAvailability, 811, ReplayState

    At initialization, database copy 'DB\SVR' has logs in the generation range (7938745 - 7939917) and required logs in the range (7939912 - 7939917).

    Information, Date, HighAvailability, 338, Database Action

    Incremental Reseed for database 'DB' finished divergence checking and/or resynchronizing the log stream. (IncReseed Needed Check Duration=00:00:00.8157229, IncReseed Duration=00:00:00)

    ---

    And in In Apps and Services > Microsoft > Exchange > High Availability > Debug, there are loads of logs, approximately 9 every 30 mins, going from replay state "RestartSoon" to ReplayState "CopyStatusEnum"

    Any ideas?!

    Monday, November 11, 2013 3:20 PM

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    Hi,

    1. Please locate to Event Viewer-Applications and Services Logs-Microsoft-Exchange-MailboxDatabaseFailureItems-Operational, post detailed information about the above Failure Item you provided for my further research.

    2. Please run the following cmdlet to check if the DAG is in healthy replication status:

    Get-MailboxDatabaseCopyStatus

    Test-ReplicationHealth

    If there are any problems, please feel free to let me know.

    Best regards,
    Amy

    Amy Wang
    TechNet Community Support

    Tuesday, November 12, 2013 8:34 AM
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    Hi Amy,

    As requested:

    Log Name:      Microsoft-Exchange-MailboxDatabaseFailureItems/Operational
    Source:        Microsoft-Exchange-MailboxDatabaseFailureItems
    Date:          12/11/2013 09:00:21
    Event ID:      1
    Task Category: Store
    Level:         Information
    Keywords:      
    User:          SYSTEM
    Computer:      excsvr
    Description:
    Failure Item (Namespace=1, Tag=16, Database=CN=DB,CN=Databases,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=ORG,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=domain,DC=co,DC=uk, Instance=)
    Event Xml:
    <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
      <System>
        <Provider Name="Microsoft-Exchange-MailboxDatabaseFailureItems" Guid="{08E893EA-4C11-4FFF-A737-99B9EEDEE4F4}" />
        <EventID>1</EventID>
        <Version>0</Version>
        <Level>4</Level>
        <Task>1</Task>
        <Opcode>0</Opcode>
        <Keywords>0x8000000000000000</Keywords>
        <TimeCreated SystemTime="2013-11-12T09:00:21.491438800Z" />
        <EventRecordID>9943</EventRecordID>
        <Correlation />
        <Execution ProcessID="5688" ThreadID="9700" />
        <Channel>Microsoft-Exchange-MailboxDatabaseFailureItems/Operational</Channel>
        <Computer>excsvr</Computer>
        <Security UserID="S-1-5-18" />
      </System>
      <UserData>
        <EventXML xmlns:auto-ns2="http://schemas.microsoft.com/win/2004/08/events" xmlns="myNs">
          <Version>1</Version>
          <Namespace>1</Namespace>
          <Tag>16</Tag>
          <DatabaseGuid>{DC22CD70-5BE5-4C87-ACD1-85C17928C1F7}</DatabaseGuid>
          <DatabaseInstanceName>
          </DatabaseInstanceName>
          <Component>Store</Component>
          <IOErrorIsSpecified>false</IOErrorIsSpecified>
          <NotificationEventIsSpecified>false</NotificationEventIsSpecified>
          <IOError>
            <Category>0</Category>
            <FileName>
            </FileName>
            <Offset>0</Offset>
            <Size>0</Size>
          </IOError>
          <NotificationEvent>
            <EventID>0</EventID>
            <ParameterBufferSize>0</ParameterBufferSize>
            <ParameterBuffer>
            </ParameterBuffer>
          </NotificationEvent>
        </EventXML>
      </UserData>
    </Event>

    [PS] C:\Windows\system32>Test-ReplicationHealth

    Server    Check                      Result     Error
    ------    -----                      ------     -----
    excsvr    ClusterService             Passed
    excsvr    ReplayService              Passed
    excsvr    ActiveManager              Passed
    excsvr    TasksRpcListener           Passed
    excsvr    TcpListener                Passed
    excsvr    DagMembersUp               Passed
    excsvr    ClusterNetwork             Passed
    excsvr    QuorumGroup                Passed
    excsvr    FileShareQuorum            Passed
    excsvr    DBCopySuspended            Passed
    excsvr    DBCopyFailed               Passed
    excsvr    DBInitializing             Passed
    excsvr    DBDisconnected             Passed
    excsvr    DBLogCopyKeepingUp         Passed
    excsvr    DBLogReplayKeepingUp       Passed


    Tuesday, November 12, 2013 9:18 AM
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    Hi,

    About the above Microsoft-Exchange-MailboxDatabaseFailureItems/Operational log, it just is an information and it isn't an error. We can just ignore it. What's more, the result of Test-ReplicationHealth cmdlet is normal.

    I would like to verify if the status of DB copies is Health. Besides, I recommend you run Get-MailboxDatabaseCopyStatus cmdlet and see the result.

    Hope it helps.

    Best regards,
    Amy

    Amy Wang
    TechNet Community Support

    Thursday, November 14, 2013 2:09 AM
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    Hi Amy,

    The database copies are all Healthy or Mounted, it is the first thing i'd look at

    J

    Thursday, November 14, 2013 10:13 AM
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    Hi,

    From your description, maybe there is a need using advanced tools to check your environment via remote connection. It's better to get a help from Microsoft Support.

    If you still would like to handle this issue on forum, I will continue to help you.

    Best regards,
    Amy

    Amy Wang
    TechNet Community Support



    Friday, November 15, 2013 7:47 AM
    Moderator