Bug 39441 - Keyword not supported : 'multisubnetfailover' - error in mono
Summary: Keyword not supported : 'multisubnetfailover' - error in mono
Alias: None
Product: Class Libraries
Classification: Mono
Component: System.Data (show other bugs)
Version: 4.2.0 (C6)
Hardware: PC All
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2016-03-08 10:54 UTC by sanjay kumar singh
Modified: 2018-02-22 22:25 UTC (History)
2 users (show)

See Also:
Is this bug a regression?: ---
Last known good build:


Description sanjay kumar singh 2016-03-08 10:54:19 UTC
Application which has the bug is using System.Data.SqlClient (ado.net) to make database connection with SQL Server 2014.Database  connectivity works fine with normal connection string however whenever I add MultiSubnetFailover = True in order to configure the application to support multi subnet failover, application throws an database connection error as mentioned below. While same connection string works fine on windows machine ( with .Net Framework without mono). Application is deployed on both Windows and Linux and this error occurs in both the environments.

This connection which is used in the application:
connectionString="Data Source=********; User ID=********; Password=********; Initial Catalog=********; Connection Timeout=300; MultiSubnetFailover=true" 

Error which is thrown  when MultiSubnetFailover=true used:

ExecuteGetDataTable Exception : System.ArgumentException: Keyword not supported : 'multisubnetfailover'. 
at System.Data.SqlClient.SqlConnection.SetProperties (System.String name, System.String value) [0x00000] in <filename unknown>:0 
at System.Data.SqlClient.SqlConnection.SetConnectionString (System.String connectionString) [0x00000] in <filename unknown>:0 
at System.Data.SqlClient.SqlConnection.set_ConnectionString (System.String value) [0x00000] in <filename unknown>:0 
at System.Data.SqlClient.SqlConnection..ctor (System.String connectionString) [0x00000] in <filename unknown>:0 
at (wrapper remoting-invoke-with-check) System.Data.SqlClient.SqlConnection:.ctor (string) 

Please help and advice.

Comment 1 Marek Safar 2018-02-22 22:25:05 UTC
Mono 5.10 has significantly improved System.Data implementation which should resolve this issue. If you can still reproduce it please reopen the issue.

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