I have just got the latest code from SVN and I got the above error when I logged into my application. The exception message was:
An error occurred while getting provider information from the
database. This can be caused by Entity Framework using an incorrect
connection string. Check the inner exceptions for details and ensure
that the connection string is correct.
The inner exception says:
The client was unable to establish a connection because of an error
during connection initialization process before login. Possible causes
include the following: the client tried to connect to an unsupported
version of SQL Server; the server was too busy to accept new
connections; or there was a resource limitation (insufficient memory
or maximum allowed connections) on the server. (provider: Shared
Memory Provider, error: 0 - The handle is invalid.
The issue is, none of these suggestions seem like the cause. Any idea what might cause this?
You're going to love the solution to this. I restarted my machine and it works fine now. :o).
Related
I have an UWP app installed in an upboard that reads IotHub messages sended to that deviceID.
deviceClient = DeviceClient.CreateFromConnectionString(deviceConnectionString, TransportType.Mqtt);
Message receivedMessage = await deviceClient.ReceiveAsync();
The app works fine and reads the messages correctly, but sometimes I have these exceptions:
IotHubClientTransientException: Transient error occured, please retry.
I read that these errors may can be generated from wrong connection string, but it's not possible in my case.
Can someone help me?
The error is most likely caused by a network connectivity error. Just add a retry strategy. You could simply write your own or use a library like Polly.Net
In a distributed world connectivity issues should be expected, so I don't think there is any problem with your code other than is should be more resilient. I think it is really nice that the exceptions even tells you it should be retried, most of the times you have to figure that out yourself.
Some more guidance from the Azure team can be found here. In your case the Retry pattern is a good fit:
Retry
Enable an application to handle anticipated, temporary failures when it tries to connect to a service or network resource by transparently retrying an operation that's previously failed.
While opening IBM Cognos Administration you can receive error "CNC-MON-0024 Monitor Service paging error: The Network Adapter could not establish the connection."
The issue was resolved when the cognos connection was restarted.
I didn't understand why the error had occurred. Can someone please explain why this error had occurred.
Thank you
There can be many reason why it's happening:
Getting error CNC-MON-0024 Monitor Service paging error: No suitable driver
CNC-MON-0024 Monitor Service paging error
Launching the Cognos Administration Page displays an error
From my expirience, usually it's usually either incorect configuration or corrupted notification DB.
In order to troubleshoot it, i suggest you split the content store db and the notification db as a first step:
Change the Connection Properties for the Notification Database
I'm having a strange error with a recently deployed Azure website.
Everything seems to work most of the time, but on a regular basis (at least daily) there is a period during which I receive following error:
A network-related or instance-specific error occured while establishing a connection to SQL Server.
The server was not found or was not accessible.
Is this a stability issue with Azure or is it possible that something's wrong in my code (but why does it work then most of the time)?
Is the code using the Transient Fault Handling Application Block - http://msdn.microsoft.com/en-us/library/hh680934(v=PandP.50).aspx? This block understands how to handle the transient errors that can, and will, happen with SQL Database.
I'm running a redis / node.js server and had a
[Error: Auth error: Error: ERR max number of clients reached]
My current setup is, that I have a connection manager, that adds connections until the maximum number of concurrent connections for my heroku app (256, or 128 per dyno) is reached. If so, it just delivers an already existing connection. It's ultra fast and it's working.
However, yesterday night I got this error and I'm not able to reproduce it. It may be a rare error and I'm not sleeping well, knowing it's out there. Because: Once the error is thrown, my app is no longer reachable.
So my questions would be:
is that kind of a connection manager a good idea?
would it be a better idea to use that manager to wait for 'idle' to be called and the close the connection, meaning that I had to reestablish a connection everytime a requests kicks in (this is what I wanted to avoid)
how can I stop my app from going down? Should i just flush the connection pool whenever an error occurs?
What are your general strategies for handling multiple concurrent connections with a given maximum?
In case somebody is reading along:
The error was caused by a messed up redis 0.8.x that I deployed to live:
https://github.com/mranney/node_redis/issues/251
I was smart enough to remove the failed connections from the connection pool but forgot to call '.quit()' on it, hence the connection was out there in the wild but still a connection.
We are currently experiencing a rather troublesome problem in our development environment with the following message...
A connection was successfully established with the server,
but then an error occurred during the pre-login handshake.
(provider: SSL Provider, error: 0 - The certificate's CN
name does not match the passed value.)
...the commonly accepted wisdom to resolving this problem is to set the TrustServerCertificate portion of the connection to True. However, this does not work reliably or consistently.
This particular error occurs in a number of instances, for instance testing our WCF Service in our Azure Emulator talking to live / hosted SQL Azure Instance or even using SQL Management Studio. The only common denominator we've found is that this occurs only when we connect directly to SQL Azure as opposed to when its hosted and Azure is talking directly to SQL Azure (which does work).
I've tried a number of tactics to resolve the problem (such as the one detailed here), i.e. believing it was connection related and removing pooling and other modifications to the connection string. But alas, none are conclusive and more irritating is that the error is intermittent and will prevent access for a short period of time before magically resolving itself.
Other factors that I've eliminated.
We're using the Transcient Application Block to attempt to recover from these errors, but no.
Our office has no proxy server with our connection to the Azure hosted services.
Has anyone else experienced this problem or has any suggestions?
You need to scan for Non-IFS Winsock BSPs or LSPs which not compatible with the FILE_SKIP_COMPLETION_PORT_ON_SUCCESS flag ,problem results primarily from non-IFS LSPs Being installed.
Just run "netsh WinSock Show Catalog" from command prompt , and check any "service flag" which doesn't look in the format of 0x20xxx
In my case I found that "Speed Accelerator" with service flag 0x66,removing this software solve my Problem .
More information can be found here : http://support.microsoft.com/kb/2568167
What does your connection string look like? Not sure if you've tried this yet but I remember having a problem similar when using a remote SQL connection to SQL Azure and found that I had to set:
Trusted_Connection=False;Encrypt=True
and remove any Connect Timeout from the string entirely.