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Why the Exception Message, "The underlying provider failed on Open...." thrown from BT

davidjosec
4 months ago

1 Error thrown from the server: {"Message":"An error has occurred.","ExceptionMessage":"The underlying provider failed on Open.","ExceptionType":"System.Data.Entity.Core.EntityException","StackTrace":" at System.Data.Entity.Core.EntityClient.EntityConnection.Open()\r\n at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection(Boolean shouldMonitorTransactions)\r\n at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)\r\n at System.Data.Entity.Core.Objects.ObjectQuery`1.<>c_DisplayClass41_0.<GetResults>b0()\r\n at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n at System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)\r\n at System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b_31_0()\r\n at System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()\r\n at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)\r\n at BinaryTree.ADMigrator.WebServer.SecurityActionFilter.OnActionExecuting(HttpActionContext actionContext)\r\n at System.Web.Http.Filters.ActionFilterAttribute.OnActionExecutingAsync(HttpActionContext actionContext, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerN

  • 0 4 months ago

    Certainly, I can help you understand the error message and potential solutions.

    The error message indicates that the underlying database provider failed to open the connection. This could be due to a variety of reasons, such as:

      • Network connectivity issues: Ensure that the server can communicate with the database server. Check for any network or firewall issues that might be preventing the connection.

      • Database server issues: Check if the database server is running and accessible. Verify that the database is not in an unhealthy state or experiencing any errors.

      • Database configuration issues: Check the database connection string and ensure that it is correct. Verify that the database login credentials are valid and authorized to access the required database resources.

      • Database schema issues: If the database schema has recently changed, ensure that the application is using the latest schema version. Outdated application code might not be compatible with the new schema, causing connection errors.

    To resolve this issue, try the following steps:

      1. Check network connectivity: Use ping or telnet to verify that the server can communicate with the database server.

      1. Check database server status: Connect to the database server using a separate tool or process to ensure it is running and accessible.

      1. Validate database connection string: Double-check the database connection string in the application configuration file. Ensure that the hostname, port, database name, and login credentials are correct.

      1. Update application code: If the database schema has changed, update the application code to use the latest schema version. This might involve updating data access layers or entity classes.

      1. Verify database permissions: Ensure that the application has the necessary permissions to access the required database resources. Check the database roles and user privileges assigned to the application's account.

    If the issue persists, consider contacting the database administrator or vendor for further assistance. They can provide more specific troubleshooting steps and address any underlying database issues.