From 981d55ec263a85d5944b66ed3166a3031a7399d8 Mon Sep 17 00:00:00 2001
From: Alex Zaytsev <hazzik@gmail.com>
Date: Fri, 4 Jun 2021 09:21:45 +1200
Subject: [PATCH 1/3] Fix possible ArgumentNullException when provider is
 unable to open a connection (#2794)

---
 src/NHibernate/Tool/hbm2ddl/SchemaExport.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/NHibernate/Tool/hbm2ddl/SchemaExport.cs b/src/NHibernate/Tool/hbm2ddl/SchemaExport.cs
index 1cdd27614fe..a5b97a6c21a 100644
--- a/src/NHibernate/Tool/hbm2ddl/SchemaExport.cs
+++ b/src/NHibernate/Tool/hbm2ddl/SchemaExport.cs
@@ -468,7 +468,11 @@ private void InitConnectionAndExecute(Action<string> scriptAction, bool execute,
 			{
 				if (connectionProvider != null)
 				{
-					connectionProvider.CloseConnection(connection);
+					if (connection != null)
+					{
+						connectionProvider.CloseConnection(connection);
+					}
+
 					connectionProvider.Dispose();
 				}
 			}

From ab050c5c8b7f773b5527eaff71a12609a38ec63a Mon Sep 17 00:00:00 2001
From: Alex Zaytsev <hazzik@gmail.com>
Date: Tue, 8 Jun 2021 23:50:57 +1200
Subject: [PATCH 2/3] Regenerate async code for #2794

---
 src/NHibernate/Async/Tool/hbm2ddl/SchemaExport.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/NHibernate/Async/Tool/hbm2ddl/SchemaExport.cs b/src/NHibernate/Async/Tool/hbm2ddl/SchemaExport.cs
index 6c44940aefa..34a08be5939 100644
--- a/src/NHibernate/Async/Tool/hbm2ddl/SchemaExport.cs
+++ b/src/NHibernate/Async/Tool/hbm2ddl/SchemaExport.cs
@@ -525,7 +525,11 @@ public async Task ExecuteAsync(Action<string> scriptAction, bool execute, bool j
 			{
 				if (connectionProvider != null)
 				{
-					connectionProvider.CloseConnection(connection);
+					if (connection != null)
+					{
+						connectionProvider.CloseConnection(connection);
+					}
+
 					connectionProvider.Dispose();
 				}
 			}

From 15d4cc063c0c68d29e979383ec2bff0d5bb8595e Mon Sep 17 00:00:00 2001
From: Alex Zaytsev <hazzik@gmail.com>
Date: Wed, 4 Aug 2021 02:07:32 +0000
Subject: [PATCH 3/3] SslMode=none for MySQL

---
 teamcity.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/teamcity.build b/teamcity.build
index 1aebbf13cbb..f5a9ce4110d 100644
--- a/teamcity.build
+++ b/teamcity.build
@@ -207,7 +207,7 @@
 		<property name="db-service" value="MySQL57" />
 		<property name="nhibernate.connection.driver_class" value="NHibernate.Driver.MySqlDataDriver" />
 		<property name="nhibernate.dialect"	value="NHibernate.Dialect.MySQL5Dialect" />
-		<property name="nhibernate.connection.connection_string" value="Data Source=localhost;Database=nhibernate;User ID=nhibernate;Password=nhibernate;Protocol=memory;Old Guids=True;" />
+		<property name="nhibernate.connection.connection_string" value="Data Source=localhost;Database=nhibernate;User ID=nhibernate;Password=nhibernate;Protocol=memory;Old Guids=True;SslMode=none;" />
 	</target>
 
 	<target name="setup-teamcity-sqlanywhere">