Bug 3606 - Connection String parameter "Failover Partner" is not supported
Summary: Connection String parameter "Failover Partner" is not supported
Alias: None
Product: Class Libraries
Classification: Mono
Component: System.Data ()
Version: 2.10.x
Hardware: PC Windows
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-02-23 06:00 UTC by Josef Semmler
Modified: 2018-02-22 22:36 UTC (History)
4 users (show)

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

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Description Josef Semmler 2012-02-23 06:00:39 UTC
I have the following code
using System.Data.SqlClient;

namespace DBFailoverTest
    class Program
        static void Main(string[] args)
            string connectionString = "Data Source=server1;Failover Partner=server2;Initial Catalog=testdb;Persist Security Info=True;User ID=user;password=letmein";
            using (SqlConnection connection = new SqlConnection(connectionString))
                SqlCommand queryCommand = new SqlCommand("SELECT 1", connection);
                SqlDataReader queryCommandReader = queryCommand.ExecuteReader();
Using mono 2.6.7 i only get:
C:\DBFailoverTest\bin\Debug>mono DBFailoverTest.exe
Unhandled Exception: System.ArgumentException: Keyword not supported : 'failover partner'.
  at System.Data.SqlClient.SqlConnection.SetProperties (System.String name, System.String value) [0x00000] in <filename unknown>:0
Same with mono 2.10.x
I also checked the code on githup ... and although the values seem to be there - it seems as if the "SetProperties" method does not support this option!?
Comment 1 no name 2016-03-25 12:20:05 UTC
Anything new on it?
I ran into this issue on Ubuntu 14.04 with xsp webserver and .Net Framework 4 and SQL Server 2005
Comment 2 a.gupta 2017-02-24 18:35:19 UTC
Having the same issue:

This also doesn't support multisubnetfailover. 

For some reason the docs say its supported:

Either the docs should be update to reflect this is not supported, or the code should change.
Comment 3 Egorbo 2017-04-12 21:01:12 UTC
System.Data is moving to corefx sources where the 'Failover Partner' and 'multisubnetfailover' keywords are fully implemented.
Comment 4 Marek Safar 2018-02-22 22:36:14 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.