MySQL Bugs: #89595: Unhandled Exception, only on Linux os

Bug #89595	Unhandled Exception, only on Linux os
Submitted:	9 Feb 2018 0:43	Modified:	10 Aug 2022 18:40
Reporter:	qining luo	Email Updates:
Status:	Can't repeat	Impact on me:	None
Category:	Connector / NET	Severity:	S1 (Critical)
Version:	8.0.10-rc	OS:	Ubuntu (16.04LTS)
Assigned to:		CPU Architecture:	Any
Tags:	exception, initializer, MySql.Data, MySqlConnection, ReplicationManager, ubuntu

Description:
ATTENTION! Execption only happened on Linux os, please test on Linux os.

OS         : Ubuntu 16.04 LTS
Dotnet SDK : 2.1.4 
MySql.Data : 8.0.10-rc
MySql      : 5.7.21-0ubuntu0.16.04.1

Unhandled Exception: System.TypeInitializationException: The type
initializer for 'MySql.Data.MySqlClient.Replication.ReplicationManager'
threw an exception. ---> System.TypeInitializationException: The type
initializer for 'MySql.Data.MySqlClient.MySqlConfiguration' threw an
exception. ---> System.ArgumentOutOfRangeException: Length cannot be
less than zero.
Parameter name: length
at System.String.Substring(Int32 startIndex, Int32 length)
at System.Uri.CreateHostStringHelper(String str, UInt16 idx, UInt16
end, Flags& flags, String& scopeId)
at System.Uri.CreateHostString()
at System.Uri.EnsureHostString(Boolean allowDnsOptimization)
at System.Uri.GetComponentsHelper(UriComponents uriComponents,
UriFormat uriFormat)
at System.Uri.ToString()
at System.Configuration.ClientConfigPaths.GetTypeAndHashSuffix(String
exePath)
at System.Configuration.ClientConfigPaths..ctor(String exePath,
Boolean includeUserConfig)
at System.Configuration.ClientConfigPaths.GetPaths(String exePath,
Boolean includeUserConfig)
at System.Configuration.ClientConfigurationHost.get_ConfigPaths()
at
System.Configuration.ClientConfigurationHost.RequireCompleteInit(IInternalConfigRecord
record)
at
System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String
configKey, Boolean getLkg, Boolean checkPermission, Boolean
getRuntimeObject, Boolean requestIsHere, Object& result, Object&
resultRuntimeObject)
at System.Configuration.BaseConfigurationRecord.GetSection(String
configKey)
at System.Configuration.ConfigurationManager.GetSection(String
sectionName)
at MySql.Data.MySqlClient.MySqlConfiguration..cctor()
--- End of inner exception stack trace ---
at MySql.Data.MySqlClient.MySqlConfiguration.get_Settings()
at MySql.Data.MySqlClient.Replication.ReplicationManager..cctor()
--- End of inner exception stack trace ---
at
MySql.Data.MySqlClient.Replication.ReplicationManager.IsReplicationGroup(String
groupName)
at MySql.Data.MySqlClient.MySqlConnection.Open()
at mysqltest1.Program.Main(String[] args) in
/home/lqn/test/mysqltest1/Program.cs:line 24

How to repeat:
Test code:

using System;
using MySql.Data.MySqlClient;
namespace mysqltest1
{
    class Program
    {
        static void Main(string[] args)
        {
             MySqlConnectionStringBuilder b = new MySqlConnectionStringBuilder();
             b.Server = "localhost";
             b.Port = 3306;
             b.Database = "testdb";
             b.UserID = "root";
             b.Password = "123456";
             b.CharacterSet = "utf8";
             var connstr = b.ToString();
             MySqlConnection conn = new MySqlConnection(connstr);
             conn.Open();
             conn.Close();
        }
    }
}

dotnet run

Screenshot,Exception on ubuntu.

Attachment: Image 1.png (image/png, text), 166.54 KiB.

Hello qining,

Thank you for the bug report.
Verified based on internal discussion with dev's.

Thanks,
Chiranjeevi.

Posted by developer:
 
Cannot reproduce the bug. Tried with various scenarios and none of them show the error message.

Bug #94759 marked as duplicate of this one

My reason for this issue was incompatibility between MySql.Data.dll and .Net framework version. Once I found latest version of MySql.Data.dll for .NET 5 (in my particular case), this issue gone. Prior to change dll I gave a try to various suggestions within and without config file, with no luck. Also incompatibiliy between dll and execution environment could cause various exceptions similar to this.

This error ALWAYS occures on Windows, Linux.(.net core 1~3, .net 5, .net 6)
Once we publish a project which ref to MySql.Data, generate a single file, this error occures.

Posted by developer:
 
Hi Whikiey Yan,

Can you please share how can we reproduce the issue, you can attach a sample project if you like.

Bug not reproducible.