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POMysqlMembership Membership.ValidateUser Deadlock issue when under load
 

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  1. POMysqlMembership Membership.ValidateUser Deadlock issue when under load
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    <p>I have a WCF Webservice with a custom httpModule which I use to do UserName/Password authentication against the MysqlMembership.</p> <pre><code>public void Init(HttpApplication application) { application.AuthenticateRequest += new EventHandler(this.OnAuthenticateRequest); application.EndRequest += new EventHandler(this.OnEndRequest); } public void OnAuthenticateRequest(object source, EventArgs eventArgs) { ... ... if (Membership.ValidateUser(username, password)) { </code></pre> <p>When I started loadtesting my service, I came across a perplexing problem. Requests randomly fail the Membership.ValidateUser call. I am using the same username/login for each thread in my load tester. Here is the error:</p> <pre><code> [MySqlException (0x80004005): Deadlock found when trying to get lock; try restarting transaction] MySql.Data.MySqlClient.MySqlStream.ReadPacket() +506 MySql.Data.MySqlClient.NativeDriver.GetResult(Int32&amp;amp; affectedRow, Int32&amp;amp; insertedId) +450 MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) +131 MySql.Data.MySqlClient.MySqlDataReader.NextResult() +1216 MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) +2191 MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() +27 MySql.Web.Security.MySQLMembershipProvider.ValidateUser(String username, String password) +1092 [ProviderException: An exception occurred. Please check the Event Log.] MySql.Web.Security.MySQLMembershipProvider.ValidateUser(String username, String password) +1481 MyApplication.UserAuthenticator.UserNameAuthenticator.OnAuthenticateRequest(Object source, EventArgs eventArgs) in C:\Develop\MyProject\MyProject.UserAuthenticator\UserNameAuthenticator.cs:123 System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +80 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp;amp; completedSynchronously) +270 </code></pre> <p>Any ideas?</p> <p>Thanks, AFrieze</p>
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