200 lines
10 KiB
C#
200 lines
10 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Data.SqlClient;
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using System.Text;
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namespace Tapeti.Flow.SQL
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{
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internal static class SqlExceptionHelper
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{
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// 2601: Cannot insert duplicate key row in object '%.*ls' with unique index '%.*ls'. The duplicate key value is %ls.
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// 2627: Violation of %ls constraint '%.*ls'. Cannot insert duplicate key in object '%.*ls'. The duplicate key value is %ls.
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public static bool IsDuplicateKey(SqlException e)
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{
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return e != null && (e.Number == 2601 || e.Number == 2627);
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}
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public static bool IsTransientError(Exception e)
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{
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switch (e)
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{
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case TimeoutException _:
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return true;
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case Exception exception:
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{
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var sqlExceptions = ExtractSqlExceptions(e);
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foreach (var sqlException in sqlExceptions)
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{
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var sqlErrors = UnwrapSqlErrors(sqlException);
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if (IsRecoverableSQLError(sqlErrors))
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return true;
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}
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return false;
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}
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default:
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return false;
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}
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}
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/// <summary>
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/// Extracts alls SqlExceptions from the main and inner or aggregate exceptions
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/// </summary>
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public static IEnumerable<SqlException> ExtractSqlExceptions(Exception e)
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{
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while (e != null)
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{
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switch (e)
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{
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case AggregateException aggregateException:
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foreach (var innerException in aggregateException.InnerExceptions)
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{
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foreach (var extractedSqlException in ExtractSqlExceptions(innerException))
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yield return extractedSqlException;
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}
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break;
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case SqlException sqlException:
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yield return sqlException;
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break;
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}
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e = e.InnerException;
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}
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}
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/// <summary>
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/// Goes through all errors in a SqlException, and any InnerException that is also a SqlException.
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/// </summary>
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public static IEnumerable<SqlError> UnwrapSqlErrors(SqlException exception)
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{
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while (exception != null)
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{
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foreach (SqlError error in exception.Errors)
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yield return error;
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exception = exception.InnerException as SqlException;
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}
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}
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// Mostly borrowed from EF:
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// https://github.com/aspnet/EntityFrameworkCore/blob/d8b7ebbfabff3d2e8560c24b1ff14d1f4244ca6a/src/EFCore.SqlServer/Storage/Internal/SqlServerTransientExceptionDetector.cs
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private static bool IsRecoverableSQLError(IEnumerable<SqlError> sqlErrors)
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{
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foreach (var err in sqlErrors)
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{
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switch (err.Number)
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{
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// This exception can be thrown even if the operation completed succesfully, so it's safer to let the application fail.
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// DBNETLIB Error Code: -2
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// Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. The statement has been terminated.
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// In onze situatie mag elke repository operation nogmaals uitgevoerd worden dus gaan we deze retry-en, ook al vind EF van niet.
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case -2:
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// EF doesn't recognize this one for some reason, but it occurs when I stop the SQL Server service
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case 2:
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// I had this occur once as well, even though all credentials were valid, so assume it's transient as well
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case 4060:
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// SQL Error Code: 49920
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// Cannot process request. Too many operations in progress for subscription "%ld".
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// The service is busy processing multiple requests for this subscription.
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// Requests are currently blocked for resource optimization. Query sys.dm_operation_status for operation status.
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// Wait until pending requests are complete or delete one of your pending requests and retry your request later.
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case 49920:
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// SQL Error Code: 49919
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// Cannot process create or update request. Too many create or update operations in progress for subscription "%ld".
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// The service is busy processing multiple create or update requests for your subscription or server.
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// Requests are currently blocked for resource optimization. Query sys.dm_operation_status for pending operations.
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// Wait till pending create or update requests are complete or delete one of your pending requests and
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// retry your request later.
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case 49919:
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// SQL Error Code: 49918
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// Cannot process request. Not enough resources to process request.
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// The service is currently busy.Please retry the request later.
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case 49918:
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// SQL Error Code: 41839
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// Transaction exceeded the maximum number of commit dependencies.
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case 41839:
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// SQL Error Code: 41325
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// The current transaction failed to commit due to a serializable validation failure.
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case 41325:
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// SQL Error Code: 41305
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// The current transaction failed to commit due to a repeatable read validation failure.
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case 41305:
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// SQL Error Code: 41302
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// The current transaction attempted to update a record that has been updated since the transaction started.
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case 41302:
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// SQL Error Code: 41301
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// Dependency failure: a dependency was taken on another transaction that later failed to commit.
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case 41301:
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// SQL Error Code: 40613
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// Database XXXX on server YYYY is not currently available. Please retry the connection later.
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// If the problem persists, contact customer support, and provide them the session tracing ID of ZZZZZ.
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case 40613:
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// SQL Error Code: 40501
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// The service is currently busy. Retry the request after 10 seconds. Code: (reason code to be decoded).
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case 40501:
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// SQL Error Code: 40197
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// The service has encountered an error processing your request. Please try again.
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case 40197:
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// SQL Error Code: 10929
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// Resource ID: %d. The %s minimum guarantee is %d, maximum limit is %d and the current usage for the database is %d.
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// However, the server is currently too busy to support requests greater than %d for this database.
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// For more information, see http://go.microsoft.com/fwlink/?LinkId=267637. Otherwise, please try again.
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case 10929:
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// SQL Error Code: 10928
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// Resource ID: %d. The %s limit for the database is %d and has been reached. For more information,
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// see http://go.microsoft.com/fwlink/?LinkId=267637.
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case 10928:
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// SQL Error Code: 10060
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// A network-related or instance-specific error occurred while establishing a connection to SQL Server.
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// The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server
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// is configured to allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed
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// because the connected party did not properly respond after a period of time, or established connection failed
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// because connected host has failed to respond.)"}
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case 10060:
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// SQL Error Code: 10054
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// A transport-level error has occurred when sending the request to the server.
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// (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
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case 10054:
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// SQL Error Code: 10053
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// A transport-level error has occurred when receiving results from the server.
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// An established connection was aborted by the software in your host machine.
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case 10053:
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// SQL Error Code: 1205
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// Deadlock
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case 1205:
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// SQL Error Code: 233
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// The client was unable to establish a connection because of an error during connection initialization process before login.
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// Possible causes include the following: the client tried to connect to an unsupported version of SQL Server;
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// the server was too busy to accept new connections; or there was a resource limitation (insufficient memory or maximum
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// allowed connections) on the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by
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// the remote host.)
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case 233:
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// SQL Error Code: 121
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// The semaphore timeout period has expired
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case 121:
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// SQL Error Code: 64
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// A connection was successfully established with the server, but then an error occurred during the login process.
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// (provider: TCP Provider, error: 0 - The specified network name is no longer available.)
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case 64:
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// DBNETLIB Error Code: 20
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// The instance of SQL Server you attempted to connect to does not support encryption.
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case 20:
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return true;
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}
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}
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return false;
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}
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}
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}
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