In this blog post, let’s learn about the error message “18056 – The client was unable to reuse a session with SPID %d, which had been reset for connection pooling. The failure ID is %d. This error may have been caused by an earlier operation failing. Check the error logs for failed operations immediately before this error message.” in Microsoft SQL Server, the reason why it appears and the solution to fix it.
SQL Server Error Message
18056 – The client was unable to reuse a session with SPID %d, which had been reset for connection pooling. The failure ID is %d. This error may have been caused by an earlier operation failing. Check the error logs for failed operations immediately before this error message.
Reason for the Error
SQL Server Error Msg 18056 is a common error message that can occur when a client is unable to reuse a session with a particular Service Process ID (SPID). The error message indicates that the SPID had been reset for connection pooling and the failure ID is displayed as well. This error may have been caused by a previous operation failing, and it’s essential to check the error logs for any failed operations immediately before the error message.
Possible causes of SQL Server Error Msg 18056
- Connection Pooling: The most common cause of this error is connection pooling. SQL Server reuses a connection when a connection pool is used. In some cases, a connection can’t be reused, leading to the error message.
- Network Connectivity: Another possible cause of the error is network connectivity issues. If there’s a problem with the network connection, the client may not be able to establish a connection with the server, leading to the error message.
- Failed Operations: The error message may also be caused by a previous operation failing. Failed operations can leave the connection in an unstable state, leading to the error message.
Solution
Below are some of the possible solutions to fix this issue.
- Increase Connection Timeout: If connection pooling is the cause of the error, you can try increasing the connection timeout value. This will give the connection more time to establish a connection with the server.
- Restart the SQL Server: If the error is caused by a previous failed operation, restarting the SQL Server may fix the problem.
- Check Network Connectivity: If the error is caused by network connectivity issues, check the network connection and make sure it’s stable.
- Update SQL Server: If the error is caused by a bug in SQL Server, updating the software to the latest version may fix the problem.
- Disable Connection Pooling: If all else fails, you can try disabling connection pooling. This will ensure that a new connection is established each time, but it may impact performance.
