I'm trying to do a little powerShell script, which establishes a OBDC connection using SQL Server Native Client 11.0 as Driver and retrieve some data which, in my case, is just getting the list to the database tables.
##### Start the database connection and set up environment
$DbString="Driver=SQL Server Native Client 11.0;Server=[server_name];Database=[db_name];Uid=[user];Pwd=admin#[pwd];Encrypt=yes;Connection Timeout=30;"
$DBConnection=New-Object System.Data.Odbc.OdbcConnection
$DBCommand=New-Object System.Data.Odbc.OdbcCommand
$DBConnection.ConnectionString=$DbString
$DBConnection.Open()
$DBCommand.Connection=$DBConnection
$sqlQuery = "show tables;"
$DBCommand.CommandText = $sqlQuery
$DBCommand.ExecuterReader() //Crashes
The problem is when I run it, I get this problem
ERROR [42000] [Microsoft][SQL Server Native Client 11.0][SQL Server] Could not find stored procedure 'show'
It seems like the problem comes from ExecuteReader but I can't find a way out, please help !
Related
I'm using Azure Cosmos DB 4.0 with MongoDB C# Driver 2.10.4.
Most of the times the queries work fine, but I'm getting intermittent errors like this:
MongoDB.Driver.MongoConnectionException: An exception occurred while sending a message to the server.
System.IO.IOException: Unable to write data to 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.BeginSend(...
at System.Net.Sockets.NetworkStream.BeginWrite
--- End of inner exception stack trace ---
at System.Net.Sockets.NetworkStream.BeginWrite
at System.Net.Security._SslStream.StartWriting
at System.Net.Security._SslStream.ProcessWrite
at System.Net.Security._SslStream.BeginWrite
When that error happens the call takes 10-25 seconds before failing.
I'm building the MongoClient with new MongoClient(MongoClientSettings.FromConnectionString(cnstr)) and I was using the connectionstring with these arguments ?ssl=true&replicaSet=globaldb&retrywrites=false.
I tried with retryWrites=true (as per Azure Support suggestion) but that didn't help.
I tried different settings and that didn't work either (connect=direct, maxIdleTimeMS=30000, serverSelectionTimeout=5000ms, socketTimeout=10000ms).
What's causing those exceptions?
The fix was to set/force TLS 1.2 (based on this Microsoft document):
//return new MongoClient(connectionString);
var settings = MongoClientSettings.FromConnectionString(connectionString);
settings.SslSettings = new SslSettings()
{
EnabledSslProtocols = System.Security.Authentication.SslProtocols.Tls12
};
return new MongoClient(settings);
Looks like although my connection string had ssl=true, it wasn't enough to work on some servers (the error is intermittent). The same underlying error can usually be fixed by forcing TLS 1.2 so I assumed that in Mongo it could be the same issue - and it really fixed the problem.
I am following IdentityServer4 quickstart and trying to migrate in memory data to my local SQL Server (not SQL express or LocalDB that came with VS). My connection string is:
#"Server=localhost,1434;Database=MyIDS;user id=tester_1;Password=tester_1;trusted_connection=yes;".
When I start my IdentityServer, it creates the enpty db, MyIDS, and then throw an exception with 2 inner exceptions:
Inner Exception 1:
SqlException: A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: TCP Provider, error: 0 - An established connection was aborted by the software in your host machine.)
Inner Exception 2:
Win32Exception: An established connection was aborted by the software in your host machine.
Can anyone tell me what's going on here? Why a working connection always gets dropped?
localhost,1434 looks wrong, you don't need to provide the port 1434 and the commma should not be used either, it should be a colon in that case.
I typically use for local development:
server=.;Database=ASPIdentity;Trusted_Connection=True;
dot means localhost, if you use sqlexpress the connetion string would become
server=.\\sqlexpress;Database=ASPIdentity;Trusted_Connection=True;
I'm trying to create an alarm system for my application, that will trigger when one of the services (e.g. MongoDB) is not working.
What I'm doing is, once the application is started, I shut down my MongoDB server and try to connect to it, but instead of receiving an error my application just gets stuck into the execution of the method. The server console looks like something is in execution.
My current code (coffeescript) is:
checkMongoService: ()->
mongo = Npm.require 'mongodb'
assert = Npm.require 'assert'
url = 'mongodb://....'
mongo.connect url, (err, db) ->
assert.equal null, err
console.log 'Connected correctly to server'
db.close()
return
I've also been trying by doing a simple
Meteor.users.find().count();
or using MongoInternals with
testConnection = new MongoInternals.RemoteCollectionDriver("mongodb://...);
but still same issue, when mongo is not running no error is thrown and the console stops to work. If then I start Mongo again, it will just return the result (in this case the log 'Connected correctly to server')
Something that I've noticed is if I try with meteor shell to execute testConnection = new MongoInternals.RemoteCollectionDriver("mongodb://...); I get an error "Error: failed to connect to [127.0.0.1:27017]"
TL;DR
Do you might have an idea on how I can check if mongo is reachable or do you know if I'm doing something wrong with the code above?
Try setting the timeouts to be a bit shorter than the default 30 seconds:
mongo.connect(url, {
connectTimeoutMS: 1000,
socketTimeoutMS: 1000,
reconnectTries: 1
}, function(err, db) {...}
(Full set of connection params are here)
Meteor.status().status
from the docs
This method returns the status of the connection between the client and the server. The return value is an object with the following fields:
connected (Boolean)
True if currently connected to the server. If false, changes and method invocations will be queued up until the connection is reestablished.
status (String)
Blockquote
Describes the current reconnection status. The possible values are connected (the connection is up and running), connecting (disconnected and trying to open a new connection), failed (permanently failed to connect; e.g., the client and server support different versions of DDP), waiting (failed to connect and waiting to try to reconnect) and offline (user has disconnected the connection).
https://docs.meteor.com/api/connections.html
When we connect to database we got error in windows client machine.
Error:SQL30081N and SQLSTATE IS 08001.
SERVER:HP-UX DB2 10.5 FP3
Please suggest on this.
A quick Google suggests this may be the result of a firewall blocking the connection: http://www-01.ibm.com/support/docview.wss?uid=swg21503305
After the sub of the exec JCL, i've got the following error :
SQLCODE = -991
Error = ALL ATTACH WAS UNABLE TO ESTABLISH AN IMPLICIT CONNECT OR OPEN TO DB2
This error is triggered when i call a module that allows to query a table.
PS : i have the necessary privileges for the table.
Thanks.
From IBM's page:
-991 CALL ATTACH WAS UNABLE TO ESTABLISH AN IMPLICIT CONNECT OR OPEN TO DB2. RC1= rc1 RC2= rc2
And some general links for SQL return code information:
http://en.wikipedia.org/wiki/DB2_SQL_return_codes
http://theamericanprogrammer.com/programming/sqlcodes.shtml
http://www-01.ibm.com/support/docview.wss?rs=64&uid=swg27011656 - use the searches here to find lots of things
http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp
It is possible you are not running on the same LPAR as DB2 and you don't have sharing enabled.
Ensure you included DSNALI in your program bind (aka link) step, and that you're running on the correct LPAR.