AlwaysOn Connection With Primary Node Using Its Host Name
Feb 26, 2015
I have set up a 2 node availability group to take advantage of using the secondary node for a read-only replica. I actually am having two issues. The first being I can connect to the primary node using the listener dns name and ip address, but no longer can connect via its actual host name or ip address. I can ping the address with no problem, but I can't connect to port 1433 using the actual host name or ip address.
I am no problem connecting to the secondary node using its host name, but can not get to it through the listener using the applicationintent=readonly. Eventually I would like for everything to connect through the listener name, but for now still need to connect via the server's host name and don't understand why; everything I read is that the primary node should be able to be connected via both the host name and the listener name.
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Oct 3, 2014
I have a SP that runs on the primary in 18 min and 45 min on the secondary( poorly written cursor,trying to fix it).Both machines are Exactly the same.I ran them in the middle of the night when no one was on the Sec. Node as we use it for reporting.
PLE: 7,000+
AVG Disk sec/write below .01
AVG Disk sec/read below .01
CPU below 5%
both machines set a max dop 4
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Apr 20, 2015
I have not used log shipping before and find myself in a position where I need to reboot the secondary node and then the primary node and I don't actually need to failover.
Is there anything I need to be aware of. When rebooting the secondary node I assume the transactions will be held in the primary nodes log till the secondary comes back and just carry on once back up?
When rebooting the primary node nothing needs to be done and the log shipping will just start again once it has come back?
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Apr 28, 2014
I have an A & B node set up and running. I now want to add a C NODE.
The catch is the C NODE is in a SQL Cluster Environment.
I am guessing I add the Virtual Name of the C node to the current Always ON Cluster?
I tried adding it...the error message says" the Virtual Node is really the A node and to add the A NODE"?
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Jun 30, 2015
I have a 3 node 2014 AlwaysOn setup. The primary and secondary are set for automatic failover. The third node, of course, is manual (until 2016). The 2 nodes with are automatic are sitting in one datacenter, the third is in another. If the first datacenter was to go down, I would manually have to failover to the third node? What's the normal process here for having two datacenters and ensuring the availability group is always available?
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Nov 4, 2015
Our network guys have to carry out an IBM Flex Chassis move at our data centre, which will affect the primary replica of one of our SQL 2012 AlwaysOn Availability Group nodes (the secondary replica won't be affected).
They have suggested using vMotion to migrate the primary replica to another virtual host, which will result in a very brief period of network outage for the node.
I've done some reading and have seen a few potential issues regarding Stun During Page Send (SDPS) and increasing thresholds within WSFC. Unfortunately, we're not able to test this prior to the migration, so I have a few questions...
Would it be necessary to failover to the secondary replica node before performing the vMotion (and back again afterwards)?
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Aug 13, 2015
How do I add my second (secondary) node in my AlwaysOn Availability Group, after adding my head node, and the secondary node is a virtual machine. See based on the attached file if it is the correct way?
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Jan 19, 2015
We are rolling out the use of Availability Group listeners to our SQL Server 2012 Environment which has a 2 node multi-subnet cluster. The Primary is R/W and the Secondary is a non-readable node that would be manually failed over to in a DR scenario
I have set up the AGL and asked the sysadmins to create a DNS record in both subnets with fixed IP's.
The issue I have having is that when I ask the app developers to connect to the databases using the AGL it is totally random whether the AGL resolves to the Primary or DR node - as a result that are having problems getting their apps to connect.
I was thinking of asking the sys admins to remove the DNS record in the DR subnet and then add it back in should we need to fail over - but I was thinking there must be a better way.
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Oct 8, 2015
I have a Windows 2008 R2 Always on Cluster with 3 nodes (two in the primary site and one in the DR site).
Primary Site:
-Primary Site Server1
-Primary Site Server2
DR Site 1 (to be decommed):
-DR Site Server1
Our company is planning on decommissioning the DR site. But before we do this, we want to add a 4th site to the cluster. Migrate the data...and then decommission the original DR Site.
Is it possible to have this configuration:
Primary Site:
-Primary Site Server1
-Primary Site Server2
DR Site 1 (to be decommed):
-DR Site Server1
DR Site 2 (NEW DR Site):
-DR Site Server1
IF this is possible, do I simply add the new DR site to the existing cluster (same steps as adding the first DR node to the cluster when the cluster was originally configured? or are there special steps?
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Aug 4, 2015
Background information: SQL 2014 Ent. highly volatile OLTP environment. We generate 10 - 12 GB compressed transaction log backup files every 15 minutes.
Currently - we have two-node A/P cluster residing on flash array. Need to leverage AlwaysOn to offload processing. Replica server with have Flash storage. Replica node has same CPU and memory footprint. 10GB connection between nodes. Anyone generating such large transaction log for 15/30 minute time period?
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Aug 25, 2015
I am running SQL 2014 2-node AlwaysON Availability groups, Enterprise Edition in our environment and 5 databases are part of AG.
Question is, sometimes AG is getting failed over to node2 but always our preferred node is node1 due to some business needs otherwise some of our jobs will fail.
So, what I looking for is, a sql script which can handle a situation wherein, for some reason, AG is failed over to node2, it should be able to detect if node1 is back online or not and if so, it should fail back to node1. How to do this using tsql query or stored proc or sql agent job ?
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May 13, 2015
I need to change the authentication mode from 'windows' to mixed, its a 4-node participating in always-on... Will this brake/impact alwayson in any way? I know I have to restart the sql instance.
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Jun 7, 2007
Hi,
i am getting this exception i.e."
The TCP/IP connection to the host has failed. java.net.ConnectException: Connection timed out: connect" whenever i try to connect to the remote DB which is present at a different system.
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Mar 6, 2015
During the installation of the SSISDB in SQL 2012 AG, the password used to encrypt the database was not preserved. Now when the server is failed over, the SSISDB on the new primary node is not use-able.Document the password and decrypt after using the master key after failover.
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Mar 1, 2015
In always on docs in msdn they mention only about backup of secondary.. explain the backup of primary or how logs are managed in primary database. My doubt is a normal database in full recovery mode the log file will grow if we didnt take proper log backup,how the same is managed in primary in Always On.
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Apr 11, 2014
Looking for info on ole/requirement of primary and secondary replica under SQL Server 2012 AlwaysOn.
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Mar 27, 2015
y'day we faced situation one of the primary server went down and unable to failover the services to second node . by checking in logs we found
Cluster network 'Public' is partitioned. Some attached failover cluster nodes cannot communicate with each other over the network. The failover cluster was not able to determine the location of the failure. 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.
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Aug 6, 2014
I was working on a job to send me info each morning about database file free space and was noticing some odd things when looking at the log file VLFs for one of my databases in an AlwaysOn availability group.When I run DBCC LOGINFO on the secondary replica for this database, I get what I expect and most VLFs have a status of 0 (indicating the VLFs are reusable or unused). When I run DBCC LOGINFO on the primary replica, all of the VLFs have a status of 2 (active or recoverable).
Since log backups on the secondary replica in AlwaysOn still truncate the log in the primary replica, I would expect that the VLFs in the primary replica would also be mostly in a reusable or unused state. My log file sizes are the same size on each server and my backups are completing successfully. what might be causing the VLFs on the primary replica to have a status of 2 in DBCC LOGINFO when taking log backups from the secondary replica?
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Nov 29, 2014
Secondary server is offline due to a hardware issue and the log files are growing on Primary sever for availability databases. The log drive is running out of space. How can I stop the log growth for the primary databases?
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May 29, 2015
We have several Sql Server 2014 AlwaysOn Availability Groups set up in our test lab and use a combination of SCDPM and Maintenance Plans to back up the databases in them.
Our applications always work well regardless of which of the physical servers are, at any given time, designated the "Primary" for a database. Automatic failover works fine.
There are other applications, such as SQL Server built-in backup and System Center DPM that only work properly when the databases are currently hosted where originally intended.
During the normal course of Windows Updates, etc., machines will occasionally be rebooted in the middle of the night. When they come back up, we would like them to "reclaim" the databases that properly belong to them, in an orderly fashion of course (when the "Synchronization State = Sychronized"). We have lots of these test servers and we do not have staff watching the servers in the middle of the night.
Is there an automatic way to accomplish this?
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Aug 28, 2006
HiI am having trouble connecting to aspnetdb on the shared host. On my local server this is my connection string which works fine: <add name="MyLocalSqlServer" connectionString="Data Source=.SQLExpress;Integrated Security=SSPI;Initial Catalog=aspnetdb;User Instance=false"providerName="System.Data.SqlClient" />But, this doesn't work on the host (just putting in host address):<add name="MyLocalSqlServer" connectionString="190.40....232,1444;Integrated Security=SSPI;Initial Catalog=aspnetdb_booksale;User Instance=false"providerName="System.Data.SqlClient" />,and I get the error :Login failed for user ''. The user is not associated with a trusted SQL Server connection.so I put in the user id and password that i used when I created the aspnetdb_booksale db<add name="MyLocalSqlServer" connectionString="Data Source=196....232,1444;Integrated Security=False;User ID=aspnetdbbooksale; password=amanda;Initial Catalog=aspnetdb_booksale;User Instance=false"providerName="System.Data.SqlClient" />and I get the error:The ConnectionString property has not been initialized. Any ideas for me?Amanda
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Jun 26, 2007
Hi all
I have run a stranger issue:
I use ADO.NET 2.0 to access sql2000 database. during the whole process, I need stop sql server service which the program is connecting. my setup is like following:
1.Open a conection to access table and then close the connection;
2.restart sql server service ;
3.Re-open a connection to access table and then an exception was thrown out:
A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed bythe remote host.)
4. try re-open a connection to access table and then no exception was thrown out.
I think this maybe related with connection pool. any guy know the detail, please give me a response. Thank you very much!
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Feb 13, 2006
Hi,
I'm running a website using MSSQL 2000. Sometimes (not always) I get this error message on the website:
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.)
I have also websites running with MySQL and those don't have this problem.I searched google but I couldn't find usefull information on this problem.
Someone who knows what's going on here ?
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Jul 22, 2005
I am getting this error in Enterprise Manager:
TCP Provider: An existing connection was forcibly closed by the remote host.
But, my web app can still connect just fine to the db, so it's still in
the same place with the same login/password. And my registration
in EM was working just fine (for years) until yesterday I got this
error. I've tried deleting the registration and re-creating it
but the same thing. What could have gone wrong to cause this to
happen?
Thanks for any pointers, I have no idea where to start looking on this one, the host says they haven't changed anything...
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May 21, 2007
I am trying to connect to SQL Server 2005 Express with JDBC. I am getting the following exception:
Code SnippetString connectionUrl = "jdbc:sqlserver://localhost:1433;" +
"databaseName=IFC3;";
// Declare the JDBC objects.
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
try {
// Establish the connection.
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection(connectionUrl,"ifc2","password");
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host has failed. java.net.ConnectException: Connection refused: connect
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.loginWithoutFailover(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at connectURL.main(connectURL.java:43)
I am using the code example that came from Microsoft for making a JDBC connection. I looked at my configuration of SQL Server and change to use a static port 1433. I shut off Windows firewall to make sure it was not blocking communication.
When I try to telnet to port 1433 it says
Connecting To 1433...Could not open connection to the host, on port 23: Connect
failed
Any suggestions?
Thanks,
Tom
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Apr 29, 2006
We are getting a problem when the below error Log
Server: SQL Server 2005 and SP1.
Then, All the Web Servers will drop all connections and stop the network service. Later, the network service will start up automatically but all the before service is dropped.
We would like to know the error coming from?
Error Log
================
TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host
Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date: 4/29/2006
Time: 10:48:47 AM
User: N/A
Computer: 88DBWEB0
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 4/29/2006 10:48:47 AM
Event time (UTC): 4/29/2006 2:48:47 AM
Event ID: 77910e6688484582bb1c29808feef883
Event sequence: 128
Event occurrence: 13
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/24978983/Root/ph-3-127907437121075328
Trust level: Full
Application Virtual Path: /ph
Application Path: D:DB88ph
Machine name: 88DBWEB0
Process information:
Process ID: 1568
Process name: w3wp.exe
Account name: NT AUTHORITYNETWORK SERVICE
Exception information:
Exception type: SqlException
Exception message: 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.)
Request information:
Request URL: http://88db.jobsdb.com/ph/Views/MediaUpload.aspx?PostID=50202&Type=I&panelid=postimagediv
Request path: /ph/Views/MediaUpload.aspx
User host address: 192.168.10.10
User: 50077
Is authenticated: True
Authentication Type: Forms
Thread account name: NT AUTHORITYNETWORK SERVICE
Thread information:
Thread ID: 15
Thread account name: NT AUTHORITYNETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.WriteSni()
at System.Data.SqlClient.TdsParserStateObject.ExecuteFlush()
at System.Data.SqlClient.TdsParser.TdsExecuteRPC(_SqlRPC[] rpcArray, Int32 timeout, Boolean inSchema, SqlNotificationRequest notificationRequest, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader()
at System.Web.SessionState.SqlSessionStateStore.DoGet(HttpContext context, String id, Boolean getExclusive, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actionFlags)
Custom event details:
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
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May 22, 2007
I had a stand alone sql server that I upgraded to a cluster. I have an odbc connection called my_connection. The odbc test works fine. When I call the dsn from a php script it fails with this message:
Warning: odbc_connect(): SQL error: [Microsoft][ODBC SQL Server Driver][DBNETLIB
]SQL Server does not exist or access denied., SQL state 08001 in SQLConnect in D
:storage est.php on line 3
Could not connect to my_connection!
This same script works fine from any other computer. Is there an issue with connecting to a virtual server from the node via ODBC? Is there something I need to change in the client protocols?
Thanks in advance.
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Nov 14, 2005
If you connect to a server and open a query in SQL Managment studio (2005) and looses connection and then regain the connection, when you try to run the query it gives me a "TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host." This happens against both 2005 and 2000 servers. If I re-run the query it works. However, this happens in our VB.NET app as well for clients with Wireless connections. So, something has changed in Framework 2.0 regarding this, does anyone know how to tell the client to not throw this error and just try connecting the server instead which will work?
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Jul 20, 2015
SQL 2012. I am working in understanding more the feature <AlwaysOn>. I have already worked with FCI (Failover Cluster Instance) and I would like to understand more about <AlwaysOn>.
Browsing internet/documentation I am getting more knowledge about <AlwaysOn> but a doubt persists:
1) Combination of FCI + AlwaysOn (2 SQL servers for FCI providing cluster instance: SQLClusterSQLReporting + 1 SQL server (at least) for <AlwaysOn>: SQLAOn/SQLReporting)
If the FCI instance is called SQLClusterSQLReporting, all the connections are mapped to this name.
But if the<AlwaysOn> feature is added to the system, in case of failure the name of <SQL Instance AlwaysOn> must be used therefore I am obliged to re-map all my connections to SQLAOn/SQLReporting.
QUESTION: IS it correct?
If yes, I do not understand the usefulness for the <AlwaysON> feature that lead to re-map all the connection.
In my opinion it should be a <MAIN> SQL Instance covering both <FCI> + <AlwaysOn>.
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Jan 3, 2006
What does this error mean? I get this in the transmission_status column of sys.transmission_queue
An error occurred while receiving data: '10053(An established connection was aborted by the software in your host machine.)'.
Also, does the number in this message correspond to error 10053 in sys.messages?
Thanks
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Nov 6, 2015
I have a two node HA Always on group using a Listener. I would like to force a certain AD group to always be forced to the secondry node as they would only ever need to run select statements. If there an easy way to do this without using logon triggers?
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Jun 12, 2007
I read these instructions:
http://msdn2.microsoft.com/en-us/library/ms191545(SQL.90).aspx
But I'm not sure if I have to install SQL Server first on node 2, then add it to the cluster. Or does adding it to the cluster also install the software?
Thanks
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Oct 23, 2014
I'm contemplating running two availability groups on a two node WSFC. The WSFC is setup with a file share witness (i.e. no shared storage). Can I safely run 1 AG on one primary node, and the other AG on the other node (as primary). Each AG would have replicas on the passive node. This would effectively allow both servers to be in use at the same time. In a failover event, I understand that both workloads would transfer to a single server - so the box needs to be sized appropriately.
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