Oracle ManagedDataAccess - Connection Request Timed out - Pooling

Question

I'm finally admitting defeat and asking for help. I've done everything I can think of to solve this problem, but it seems I'm incapable of doing it.

I'm working with: VS2010 C# Oracle 12c ODP.Net Managed121012

I have inherited an app that uses both the managed and unmanaged dataaccess dll. It was working until I de-installed oracle. I then re-installed the 11g client for a 64bit machine. Right away I noticed that there was only dataaccess dll for framework 2 installed, but I continued anyway. I then copied all the oci and ora dlls from the client_1 folder into the bin directory of my app as well as the Oracle.DataAccess.dll into my bin directory too. I also copied Oracle.ManagedDataAccess.dll into this folder.

My application ran successfully as long as I didn't change anything on my datasets. I would have happily carried on like this, except I have to create more datasets. When I tried to add a new dataset, my data source connection wizard drop down list was blank. Then I tried to re-create the connections, but could only see the .Net Framework DProviders. I could not see the managed provider. At some point I also got this error "no data provider is currently selected".

Thinking it's because the managed provider wasn't installed I uninstalled the 11g client and installed the 64bit 12c client and copied all the relevant files into the bin of my app. I added the following lines to my app.config file:

      <configSections>
    <section name="oracle.manageddataaccess.client" type="OracleInternal.Common.ODPMSectionHandler, Oracle.ManagedDataAccess" />

  <system.data>
<DbProviderFactories>
  <remove invariant="Oracle.DataAccess.Client" />
  <remove invariant="Oracle.ManagedDataAccess.Client" />
  <add name="ODP.NET, Managed Driver" invariant="Oracle.DataAccess.Client"
         description="Oracle Data Provider for .NET, Managed Driver"
         type="Oracle.ManagedDataAccess.Client.OracleClientFactory, Oracle.ManagedDataAccess, Version=4.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />     
</DbProviderFactories>

After this I can now see some of the old data sources, but I can't connect to my database because I get a "Connection Request Timed out". When I manually creating a new connection, I can connect fine with the unmanaged provider, but get a connection request timed out error.

I'm really at the end of my rope and would really appreciate fresh eyes before I use the rope.

Thanks in advance.

Answer 1

I had identical problem after switching to managed driver. Even wrote a test app using both native and managed drivers. The conclusion was that the managed driver needs much more time to open new connection than the native driver. A solution that worked for us was to set a large connection timeout using connection string.

<connectionStrings>
    <add name="ConnectionString" connectionString="data source=xxxx;user id=xxxx;password=xxxx;persist security info=false;Connection Timeout=120;" />

</connectionStrings>