I am unable to connect to my oracle XE database through sql dveloper after changing my system host name. Please help me to connect to database.
Status : Failure -Test failed: Listener refused the connection with the following error:
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor
Related
I have installed SQL Server 2012 Express version where I have a local db instance separately. When I connect to SQL Server Express, it connected without problem, but when I try to connect to local db, I get the following error:
The attempt to attach to the database failed with the following information: 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error:2)
The system cannot find the file specified.
When I open SQL Server Configuration Manager, the local db service is not running but it is stopped. When I start that it shows error
The request failed or the service did not respond in a timely fashion. Consult the event log or other applicable error logs for details
When I open its properties and select log on as built in with local system after clicking apply it shows error
The process terminated unexpectedly.[0x8007042b].
I am trying to connect from an Azure virtual server (windows 10) to an Azure Managed SQL instance.
From the command line on the virtual server I can connect to the managed SQL instance using:
sqlcmd -S aserver-data01.public.abc123.database.windows.net,3342 -U User01 -P password
This connects fine.
I am running a compiled .NET executable on the same virtual server that attempts to connect to the managed SQL server using the following connection string:
DataBaseConnectionString, Data Source=aserver-data01.public.abc123.database.windows.net,3342; Database=MyDB; Integrated Security=false; User ID=User01; Password=password
It fails with:
System.Data.SqlClient.SqlException (0x80131904): 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: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.) ---> System.ComponentModel.Win32Exception (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
Can anyone help, I can't seem to get it to connect.
The problem was the .net executable was pulling the connection string from a comma separated config file and so was splitting the connection string in half at the comma before the port number.
After a BSOD the sql server doesn't work normal anymore.
I must restart the SQL SERVER (SQLEXPRESS) service every time I'm connecting with different client (application)
e.g: When I'm connecting with the software I developed it connects, then when I connect with SSMS it can't: I must restart the sql server service to let it connect. And when I'm connecting in SSMS first, my software can't connect: I must restart the service.
Here's the error:
TITLE: Connect to Server
Unable to connect to .\SQLEXPRESS.
------------------------------ ADDITIONAL INFORMATION :
The client was unable to establish a connection due to an error during
the connection initialization process. Common causes include attempts
to connect the client to an unsupported version of SQL Server, a
server too busy to accept new connections, or a resource limitation
(memory or maximum number of allowed connections) on the server.
(provider: Shared Memory Provider, error: 0 - There is no process at
the other end of the channel.) (Microsoft SQL Server, Error: 233)
For help, click:
http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=233&LinkId=20476
There is no process at the other end of the pipe
I have Informatica PowerCenter installed on my local machine and am able to successfully connect to the local SQL Server Database instance. However when I try to connect to a remote server I am getting 'Login failed for user domain\MachineName$'.
Here is the full Error -
Error connecting to database [
Windows authentication is used to access the Microsoft SQL Server database
Microsoft SQL Server Native Client 11.0: Login failed for user '<>\<>$'.
SQL State: 28000 Native Error: 18456
State: 1 Severity: 14
SQL Server Message: Login failed for user '<>\<>$'.
Database driver error...
Function Name : Connect
Database Error: Failed to connect to database using user [] and connection string [<>].].
Can someone throw light on how to get over this?
I installed MS SQL Server 2008 R2 on my laptop, just to practice SQL and it is running on localhost. I also downloaded Pentaho to learn a BI tools. The problem is I have been getting the below error for a week or so and cannot seem to find a solution.
Error connecting to database [test] : org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database
Error connecting to database: (using class net.sourceforge.jtds.jdbc.Driver)
Network error IOException: Connection refused: connect
org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database
Error connecting to database: (using class net.sourceforge.jtds.jdbc.Driver)
Network error IOException: Connection refused: connect
I have tried every possible login combination and also installed the necessary Java drives.
Any help is much appreciated.
At the first, you check sql server is listening on default port, sometimes isn´t take default port(antivirus,firewal, anyway).
Check the PID of SQL server service
type "netstat -a -n -o" command on console
search your PID on it and get your port where your sqlserver is listening