See the following example of a call stack of a connection timeout: : Timeout expired. The default values can be set through code, connecting string, or other methods.īefore troubleshooting, view the complete call stack of the error messages to determine the error type. You can avoid these errors if you follow the steps described in the exhausted the connection pool article. These errors occur because all pooled connections are in use, and max pool size is reached. If connections aren't closed correctly, errors may occur. The timeout period elapsed prior to obtaining a connection from the pool. System.InvalidOperationException: Timeout expired. The duration spent while attempting to connect to this server was initialization=21036 handshake=0 (Microsoft SQL Server, Error: -2). The timeout period elapsed prior to completion of the operation or the server is not responding. 32Exception (0x80004005): The wait operation timed out. The duration spent while attempting to connect to this server was initialization=23 handshake=14979 This could be because the pre-login handshake failed or the server was unable to respond back in time. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgment. (0x80131904): Connection Timeout Expired. When you encounter "timeout expired" issues, you receive one or more of the following error messages: This article provides resolutions for "command-timeout" and "connection-timeout" errors you receive when you connect to SQL Server. The client application stops the operation (instead of waiting indefinitely), which may block other operations and suspend an application. Before you start troubleshooting, check the prerequisites and go through the checklist.Ī timeout error means that a certain operation takes longer than needed.
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