Lync SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

Dear all,
I'm getting an error when I want to publish my Lync Topology. Thanks in advance.
error:
Error: A network-related or instance-specific error occurred while
establishing a connection to SQL Server. The server was not found or was not
accessible. Verify that the instance name is correct and that SQL Server is
configured to allow remote connections. (provider: SQL Network Interfaces,
error: 26 - Error Locating Server/Instance Specified)

Hi,
Would you please elaborate your Lync server environment?
Did the FE server and BE server on different subnets? If so, please try to relocate the SQL server in the same subnet as FE server and then check again.
Please also double check if the step of “Prepare first Standard Edition Server” ran succeed, if not please run again.
Here is a blog may help you:
http://terenceluk.blogspot.com/2011/05/publishing-lync-server-2010-standard.html
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software
or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

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A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider:
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===================================
Cannot connect to HUY-PC\SQLEXPRESS.
===================================
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For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=-1&LinkId=20476
Error Number: -1
Severity: 20
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Program Location:
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
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at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart)
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at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
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Hi huydaibang,
The older version SQL Server 2005 could be installed with SQL Server 2008 R2 side-by-side. It could not be the problem.
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3) Make sure the server machine is reachable, e.g, DNS can be resolve correctly, you are able to ping the server (not always true).
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5) If firewall is enabled on the server, you need to put sqlbrowser.exe and/or UDP port 1434 into exception.
For more information, please refer to
http://blogs.msdn.com/b/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx.
Thanks,
Maggie
Please remember to mark the replies as answers if they help and unmark them if they provide no help. This can be beneficial to other community members reading the thread.

Intermitten error - SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

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Hi Aries,
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"max worker threads" is set to 512 with 4CPU's. Rule out.
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http://support.microsoft.com/kb/951037
http://blogs.msdn.com/b/psssql/archive/2008/10/01/windows-scalable-networking-pack-possible-performance-and-concurrency-impacts-to-sql-server-workloads.aspx
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SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

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Hi,
It seems like this issue was more related to Microsoft Azure SQL Database, I will move this thread to Microsoft
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Affected area: KEN-PROD-VDB001\POSREPL1\master
Occurred since: 6/11/2011 11:00:56 PM
Description: Recovery point creation jobs for SQL Server 2008 database KEN-PROD-VDB001\POSREPL1\master on SQL Server (POSREPL1) - Store Settings.ken-prod-cl004.aarons.aaronrents.com have been failing. The number of failed recovery point creation jobs =
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More information
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I have checked the cluster node this particular SQL instance is running on using Perfmon and the machine is nowhere near capacity on CPU, memory, network, or Disk I/O.  I have failed this SQL Application to another node in the cluster and
receive the same error (this other node has another clustered SQL application on it that is actively running as well as backing up fine). The only thing that I am aware of that has changed is that we installed SP2 for SQL 2008 about 2 weeks prior
to when the failures started to occur. However, we updated all six clustered SQL Instances at the same time and only this one is having this issue so I don't believe that caused the problem. We are running SQL 2008 SP2 (version 10.0.4000.0)
on all clustered instances along with DPM 2010 (version 3.0.7696.0) on this particular DPM server that has the issue.
One last thing, I have also noticed errors in the event log pertaining to the same SQL backups that are failing (but the time stamps are not concurrent with each backup attempt):
Log Name:      Application
Source:        MSDPM
Date:          6/13/2011 1:09:12 AM
Event ID:      4223
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      KEN-PROD-BS002.aarons.aaronrents.com
Description:
The description for Event ID 4223 from source MSDPM cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
DPM writer was unable to snapshot the replica of KEN-PROD-VDB001\POSREPL1\model. This may be due to:
1) No valid recovery points present on the replica.
2) Failure of the last express full backup job for the datasource.
3) Failure while deleting the invalid incremental recovery points on the replica.
Problem Details:
<DpmWriterEvent><__System><ID>30</ID><Seq>1833</Seq><TimeCreated>6/13/2011 5:09:12 AM</TimeCreated><Source>f:\dpmv3_rtm\private\product\tapebackup\dpswriter\vssfunctionality.cpp</Source><Line>815</Line><HasError>True</HasError></__System><DetailedCode>-2147212300</DetailedCode></DpmWriterEvent>
the message resource is present but the message is not found in the string/message table
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
    <Provider Name="MSDPM" />
    <EventID Qualifiers="0">4223</EventID>
    <Level>2</Level>
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    <Keywords>0x80000000000000</Keywords>
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    <Security />
</System>
<EventData>
    <Data>DPM writer was unable to snapshot the replica of KEN-PROD-VDB001\POSREPL1\model. This may be due to:
1) No valid recovery points present on the replica.
2) Failure of the last express full backup job for the datasource.
3) Failure while deleting the invalid incremental recovery points on the replica.
Problem Details:
<DpmWriterEvent><__System><ID>30</ID><Seq>1833</Seq><TimeCreated>6/13/2011 5:09:12 AM</TimeCreated><Source>f:\dpmv3_rtm\private\product\tapebackup\dpswriter\vssfunctionality.cpp</Source><Line>815</Line><HasError>True</HasError></__System><DetailedCode>-2147212300</DetailedCode></DpmWriterEvent>
</Data>
    <Binary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inary>
</EventData>
</Event>
Any help would be greatly appreciated!

Don't know if this helps or not, but I also noticed another peculiar issue that is derived from this problem. If I go to "Modify protection group", then expand the cluster, then expand all six nodes in the cluster, five of them show "All SQL Servers"
and allow me to expand the SQL Instance and show all databases; the one that is having a problem backing up, when I expand the node, doesn't even show that SQL exists on the node, when in fact, it does.
I would also like to add that the databases on this node that will not backup are running fine. They run hundreds of transactions daily so we know SQL itself is OK. Even though it is a busy SQL Server, there is plenty of available resources as
the SQL buffer and memory counters show the node is not under durress.

Error using Window Server Backup on 2012R2 Hyper-V to network share

Hi
I have a Windows 2012 R2 Hyper-V server. It runs a Windows 2012 R2 VM (called
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C:\Users\admin>wbadmin enable backup
wbadmin 1.0 - Backup command-line tool
(C) Copyright 2013 Microsoft Corporation. All rights reserved.
The scheduled backup settings:
Bare metal recovery : Not Included
System state backup: Not Included
Volumes in backup: (null)
Components in backup: HyperV\server-1
Files excluded: (null)
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C:\Users\admin>wbadmin start backup
wbadmin 1.0 - Backup command-line tool
(C) Copyright 2013 Microsoft Corporation. All rights reserved.
Do you want to create a backup using the same configuration that you use for
scheduled backups?
[Y] Yes [N] No y
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Creating a shadow copy of the volumes specified for backup...
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C:\Windows\Logs\WindowsServerBackup\Backup-23-02-2015_08-49-55.log
Log of files for which backup failed:
C:\Windows\Logs\WindowsServerBackup\Backup_Error-23-02-2015_08-49-55.log
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No valid component or volume to snapshot.
A component critical volume failed to snapshot.
The log file then looks like this:
Writer Failures
Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
Instance Id: {3976D373-854E-4527-B85D-7B61924C8597}
Writer Name: Microsoft Hyper-V VSS Writer
Writer State: 0
Failure Result: 81000112
Application Result: 0
Application Message: (null)
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   Logical Path:
   Component Result: 8100010D
   Component Message: Component reports path on network share which cannot be snapshotted. (0x8100010D)
   Component: 30144C93-56A2-4259-B276-86D59AC767E9
Application backup
Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
   Component: 1DAF1C56-0635-4043-A933-E97A62EBC139
   Caption     : Offline\server-1
   Logical Path:
   Error           : 8078001D
   Error Message   : The operation ended before completion.
The odd thing is that if I set this up from a Windows 2012 Server using the GUI to exactly the same network destination, the backup works no problem. It just doesn't work when using Server 2012 R2 Hyper-V configured through a command line.
Any help appreciated,
Andrew

Hi Andrew,
I tested this in my lab server 2012R2 , but there's no error .
I would suggest you to create a new share folder on other server then check if the issue persists .
Writer Name: Microsoft Hyper-V VSS Writer
Writer State: 0
Failure Result: 81000112
Application Result: 0
Application Message: (null)
   Component: 1DAF1C56-0635-4043-A933-E97A62EBC139
   Logical Path:
   Component Result: 8100010D
   Component Message: Component reports path on network share which cannot be snapshotted. (0x8100010D)"
According to this error , please check if the VM's resource (such as VHD file) was restored on network share .
I also searched the error "ERROR - The shared restore point operation failed with error (0x8100010c)" , but I can not find it within following article :
http://blogs.technet.com/b/filecab/archive/2009/09/16/diagnosing-failures-in-windows-server-backup-part-1-vss-spp-errors.aspx
Any further information please feel free to let us know .
Best Regards,
Elton Ji
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected] .

SQL Exceptions, transport-level errors on SharePoint 2010 App Server

SharePoint 2010 becomes inaccessible 2-3 times per day. It happens at approximately the same times: 8 PM, 1 AM and 1 PM. It is inaccessible for about 3-4 minutes and then comes back on its own.
During the time it is down, we see the following errors in the event viewer on the application server:
EventID: 5586 Task Category: Database -
Unknown SQL Exception 64 occurred. Additional error information from SQL Server is included below.A transport-level error has occurred when receiving results from the server.
(provider: TCP Provider, error: 0 - The specified network name is no longer available.)
EventID: 3 Task Category: None -
.Net SqlClient Data Provider: System.Data.SqlClient.SqlException: A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error:
0 - The specified network name is no longer available.)
EventID: 6398 Task Category: Timer -
The Execute method of job definition Microsoft.Office.Server.Search.Monitoring.HealthStatUpdateJobDefinition (ID f9db48f1-f115-47ab-99b6-552460cbb782) threw an exception. More
information is included below. A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The specified network name is no longer available.)
EventID: 8086 Task Category: Business Data -
The BDC Service application failed due to a SQL Exception: SQLServer host ums1spd1v. The error returned was: 'A transport-level error has occurred when sending the request to
the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)'
The SharePoint logs have errors during the same time period saying the same kinds of things: Sql exception raw message: A transport-level error has occurred when receiving results from the server,
The specified network name is no longer available, etc.
Our network administrator has looked at the issue and cannot find any network problems.
He setup a continuous ping from the app server to the database server.
Even during the times these errors are occurring, the app server is still able to reach the database server.
However, you cannot ping the app server itself during this time.
Our database administer cannot find any SQL Server issues.
There are no errors in the event viewer or the SQL logs on the database server.
In Central Admin, we can see that one or two jobs fail with SQL errors during the times these errors take place.
It is almost always the “User Profile Service Application – User Profile Language Synchronization Job” and often the “Health Statistics Updating” or “Crawl Log Report for Search Application Search Service Application”.
These jobs run successfully at many other times during the day.
Is there a good way to tell if the database, network or SharePoint itself is the root of these problems?
The database and network guys say there are no problems in their areas, but all I can find in the SharePoint logs is that it can’t reach the database server.
Thank you for any suggestions you may have!

Since these seem to happen at very specific times, I would run a NetMon trace at that window to capture what is going back and forth (or perhaps the timer service is just unable to reach the SQL server).
Trevor Seward, MCC
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This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Lync SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified

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