System.Data.SqlClient.SqlException (0x80131904): Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding. ---> System.ComponentModel.Win32Exception (0x80004005): The wait operation timed out

I got this error in one of my client's production environment, this type of issues might come up when we are not properly updating statistics.

System.Data.SqlClient.SqlException (0x80131904): Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding. ---> System.ComponentModel.Win32Exception (0x80004005): The wait operation timed out

Workaround: Please run UPDATE STATISTICS command in all the tables on a particular database

EXEC sp_updatestats

So in my scenario UPDATE STATISTICS on all the tables resolved the issue.

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