ORA-12154 using Oracle.DataAccess.Client
I am experiencing an ORA-12154 exception when accessing a remote Oracle database using ADO.NET called from c# code running on a Windows 2003 system. The code functions correctly on our internal (remote) database using the Oracle XE 10.2 Client. At the customer site with Oracle 10.1 Client the same code generates the 12154 error.
At the customer site, I can connect without errors with the customer's connection information (Hostname, port, SID) using Navicat 8 Lite for Oracle and SQL-Plus. I can also connect with no problems using ODBC (except I can't use ODBC because it causes other problems when accessed from ASP.NET).
The connection string is correctly formulated i.e. "Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=myServerName)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=myServiceName)));User Id=myUserName;Password=myPassword"
When I run TNSPING on the client's system I get the following result (server and SID name altered for confidentiality reasons):
Adapter TNSNAMES zur Auflösung des Alias benutzt
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = myServerName)(PORT = 1521)) (CONNECT_DATA = (SERVER = dedicated) (SERVICE_NAME = myServiceName)))
OK (10 ms)
I can't determine anything about the listener since I don't have access to teh datbase server.
To summarize, my .net code fails when I use the Oracle Data Access Client, but works fine with ODBC, and Navicat, SQL Plus also work fine.
Can anyone suggest the cause and possible solution for this problem? - thanks in advance for any help :)
user8609285 wrote:
I am experiencing an ORA-12154 exception when accessing a remote Oracle database using ADO.NET called from c# code running on a Windows 2003 system. The code functions correctly on our internal (remote) database using the Oracle XE 10.2 Client. At the customer site with Oracle 10.1 Client the same code generates the 12154 error.
At the customer site, I can connect without errors with the customer's connection information (Hostname, port, SID) using Navicat 8 Lite for Oracle and SQL-Plus. I can also connect with no problems using ODBC (except I can't use ODBC because it causes other problems when accessed from ASP.NET).
The connection string is correctly formulated i.e. "Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=myServerName)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=myServiceName)));User Id=myUserName;Password=myPassword"
When I run TNSPING on the client's system I get the following result (server and SID name altered for confidentiality reasons):
Adapter TNSNAMES zur Auflösung des Alias benutzt
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = myServerName)(PORT = 1521)) (CONNECT_DATA = (SERVER = dedicated) (SERVICE_NAME = myServiceName)))
OK (10 ms)
I can't determine anything about the listener since I don't have access to teh datbase server.
To summarize, my .net code fails when I use the Oracle Data Access Client, but works fine with ODBC, and Navicat, SQL Plus also work fine.
Can anyone suggest the cause and possible solution for this problem? - thanks in advance for any help :)ora-12154 means one thing and one thing only.
[oracle@vmlnx01 ~]$ oerr ora 12154
12154, 00000, "TNS:could not resolve the connect identifier specified"
// *Cause: A connection to a database or other service was requested using
// a connect identifier, and the connect identifier specified could not
// be resolved into a connect descriptor using one of the naming methods
// configured. For example, if the type of connect identifier used was a
// net service name then the net service name could not be found in a
// naming method repository, or the repository could not be
// located or reached.
// *Action:
// - If you are using local naming (TNSNAMES.ORA file):
// - Make sure that "TNSNAMES" is listed as one of the values of the
// NAMES.DIRECTORY_PATH parameter in the Oracle Net profile
// (SQLNET.ORA)
// - Verify that a TNSNAMES.ORA file exists and is in the proper
// directory and is accessible.
// - Check that the net service name used as the connect identifier
// exists in the TNSNAMES.ORA file.
// - Make sure there are no syntax errors anywhere in the TNSNAMES.ORA
// file. Look for unmatched parentheses or stray characters. Errors
// in a TNSNAMES.ORA file may make it unusable.
// - If you are using directory naming:
// - Verify that "LDAP" is listed as one of the values of the
// NAMES.DIRETORY_PATH parameter in the Oracle Net profile
// (SQLNET.ORA).
// - Verify that the LDAP directory server is up and that it is
// accessible.
// - Verify that the net service name or database name used as the
// connect identifier is configured in the directory.
// - Verify that the default context being used is correct by
// specifying a fully qualified net service name or a full LDAP DN
// as the connect identifier
// - If you are using easy connect naming:
// - Verify that "EZCONNECT" is listed as one of the values of the
// NAMES.DIRETORY_PATH parameter in the Oracle Net profile
// (SQLNET.ORA).
// - Make sure the host, port and service name specified
// are correct.
// - Try enclosing the connect identifier in quote marks.
// See the Oracle Net Services Administrators Guide or the Oracle
// operating system specific guide for more information on naming.Bottom line is the net service name you presented is not found in the tnsnames that was being used. Which may not be the tnsnames you think was being used.
And since it never resolved that on the client side, there is no need to look to anything (like the listener) on the host side. You never got out of your driveway, so there is no need to see if the entrance to your destination is open.
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I am using Visual Studio 2003. I am creating a ASP.NET Web Application NOT Windows Application.
I logged into Oracle as a DBA, but I got this message.
I wasn't sure if I missed anything when working on the Web.
Thanks for your help.
LuanHi Chris,
Thank you so much for your help.
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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace WebBank
/// <summary>
/// Summary description for WebForm1.
/// </summary>
public class WebForm1 : System.Web.UI.Page
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protected Oracle.DataAccess.Client.OracleCommand oracleCommand1;
protected Oracle.DataAccess.Client.OracleConnection oracleConnection1;
protected System.Web.UI.WebControls.Button btnOK;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
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//DataGrid1.DataSource = ds.Tables[0];
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
InitializeComponent();
base.OnInit(e);
DataSet ds = new DataSet();
oracleDataAdapter1.Fill(ds);
DataGrid1.DataSource = ds.Tables[0];
/// <summary>
/// Required method for Designer support - do not modify
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/// </summary>
private void InitializeComponent()
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this.oracleCommand1 = new Oracle.DataAccess.Client.OracleCommand();
this.oracleConnection1 = new Oracle.DataAccess.Client.OracleConnection();
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Oracle.DataAccess.Client - DbProviderFactories.GetFactory
Hello
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Code:
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In my futile attempt to resolve this:
STEP 1: In machine.config
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<section name="oracle.dataaccess.client" type="System.Data.Common.DbProviderConfigurationHandler, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=89b483f429c47342" />
* Under ..\system.data\DbProviderFactories\, *add:
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STEP 2: I checked my assembly cache it's there:
Code:
D:\Program Files\Microsoft Visual Studio 9.0\VC>gacutil /l | findstr Oracle
System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77
a5c561934e089, processorArchitecture=x86
CoreLab.Oracle, Version=3.50.12.0, Culture=neutral, PublicKeyToken=09af7300eec
+23701, processorArchitecture=MSIL+
Oracle.DataAccess, Version=10.2.0.100, Culture=neutral, PublicKeyToken=89b483f
+429c47342+
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=de, PublicKeyToken=89
b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=es, PublicKeyToken=89
b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=fr, PublicKeyToken=89
b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=it, PublicKeyToken=89
b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=ja, PublicKeyToken=89
b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=ko, PublicKeyToken=89
b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=pt-BR, PublicKeyToken
+=89b483f429c47342+
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=zh-CHS, PublicKeyToke
n=89b483f429c47342
Oracle.DataAccess.resources, Version=10.2.0.100, Culture=zh-CHT, PublicKeyToke
n=89b483f429c47342
Policy.9.2.Oracle.DataAccess, Version=10.2.0.100, Culture=neutral, PublicKeyTo
ken=89b483f429c47342
See, I'm sure the assembly has been installed and in machine.config I used the right key/version. Weird thing is, Red Gate's reflector won't allow me to "Open" (from Cache) the dll, this prevented me to check if there exists "Oracle.DataAccess.Client.OracleClientFactory" within the assembly. So I select "Copy Local" and examined the dll from "Red Gates Reflector". There's no "Oracle.DataAccess.Client.OracleClientFactory" in the dll ???
RedGates Reflector - Screencap:
http://www.codeguru.com/forum/showthread.php?p=1831221#post1831221
STEP 3. Somebody advised to check and make sure "msvcr71.dll" is found under "ORACLE_HOME\bin" and if not copy from "D:\WINDOWS\system32". I did, it's ALREADY there.
REF:
http://www.oracle.com/technology/ora.../win06odp.html
http://social.msdn.microsoft.com/For...7-92c63ac82144
http://forums.oracle.com/forums/thre...89702�
Edited by: devvvy on Apr 9, 2009 2:57 AMThanks just installed from http://www.oracle.com/technology/software/tech/dotnet/utilsoft.html
It seems version is "2.111.6.20" - from machine.config there's a new line
<add name="Oracle Data Provider for .NET" invariant="Oracle.DataAccess.Client" description="Oracle Data Provider for .NET" type="Oracle.DataAccess.Client.OracleClientFactory, Oracle.DataAccess, Version=2.111.6.20, Culture=neutral, PublicKeyToken=89b483f429c47342" />
i added reference to it from Visual Studio. It's working now.
There were two options: one for client, the other for server. I don't understand what it means but stick to "Client" which was the default. Is this okay?
At the end there was a reminder "Run Oracle Providers for ASP.NET SQL scripts located in D:\OracleODPNET\ASP.NET\SQL directory."
Anyway, I'm verrrry glad this is working now many thanks!!! (I feel like 10 years older) -
We support a VB.NET application which uses Oracle Data Access Components (ODAC) 10.2.0.2.21 to access an Oracle 11g database. The database is on another server, so from time to time application loses its database connection because of comms failures. To cater for this eventuality it checks for a valid connection before every database call and reopens the database if it can’t find one. This works, but subsequent database calls fail and return a System.AccessViolationException.
Here is an extract from the trace.
2010-09-08 17:08:42,284 ERROR - Database connection lost. Oracle.DataAccess.Client.OracleException ORA-03135: connection lost contact
at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure)
at Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, String procedure, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src)
at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery()
2010-09-08 17:08:42,377 [5] ERROR xxxxxxxx [(null)] - Database connection established.
2010-09-08 17:08:42,440 [5] ERROR xxxxxxxx [(null)] - ERROR - error in xxxxxxxx. System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at Oracle.DataAccess.Client.OpsSql.ExecuteNonQuery(IntPtr opsConCtx, IntPtr& opsErrCtx, IntPtr& opsSqlCtx, IntPtr& opsDacCtx, IntPtr opsSubscrCtx, Int32& isSubscrRegistered, OpoSqlValCtx*& pOpoSqlValCtx, String pCommandText, IntPtr& pUTF8CommandText, IntPtr[] pOpoPrmValCtx, String[] ppOpoPrmRefCtx, OpoMetValCtx*& pOpoMetValCtx, Int32 prmCnt)
at Oracle.DataAccess.Client.OracleCommand.ExecuteNonQuery()
Has anyone come across this before? Any help will be gratefully receivedTry posting this to the ODP.NET forum.
You might need to flush out the connection pool, but they can help you with that. -
oracle.dataaccess.client not recognized in app.config for edmMapping
Hi,
I installed ODTwithODAC112030 EF provider release version.
So I want to use custom EDM Mapping for boolean or something else.
But Entity Data Model can't recognize
<oracle.dataaccess.client>
<settings>
section in appConfig file.
I'm using Win 7 x64 , VS 2010 and x86 odac components.
How can i resolve this problem.
Thank you..Would you please do a simple test like follows?
1. create test table
create table test_table (c1 number(4) primary key not null, c2 number(1, 0), c3 number(2), c4 number(5, 0), c5 number(10, 0), c6 number(19, 0));
2. create a C# Console application and create a data model from test_table.
Because there is no custom type mapping specified in app.config, default mapping is used in the model.
Your CSDL section in Model1.edmx should show:
<EntityType Name="TEST_TABLE">
<Key>
<PropertyRef Name="C1" />
</Key>
<Property Name="C1" Type="Int16" Nullable="false" />
<Property Name="C2" Type="Int16" />
<Property Name="C3" Type="Int16" />
<Property Name="C4" Type="Int16" />
<Property Name="C5" Type="Int32" />
<Property Name="C6" Type="Int64" />
</EntityType>
3. Delete Model1.edmx.
4. Open app.config and add the following below </connectionStrings> and above </configuration>. Save changes.
<oracle.dataaccess.client>
<settings>
<add name="bool" value="edmmapping number(1, 0)" />
<add name="byte" value="edmmapping number(3, 0)" />
<add name="int16" value="edmmapping number(4, 0)" />
<add name="int32" value="edmmapping number(9, 0)" />
<add name="int64" value="edmmapping number(18, 0)" />
</settings>
</oracle.dataaccess.client>
5. Create a data model from test_table again.
The new model should be using your custom type mapping.
Your CSDL section in Model1.edmx should show:
<EntityType Name="TEST_TABLE">
<Key>
<PropertyRef Name="C1" />
</Key>
<Property Name="C1" Type="Int16" Nullable="false" />
<Property Name="C2" Type="Boolean" />
<Property Name="C3" Type="Byte" />
<Property Name="C4" Type="Int32" />
<Property Name="C5" Type="Int64" />
<Property Name="C6" Type="Decimal" Precision="19" Scale="0" />
</EntityType>
If it does not work for you, you may want to check the version of your Oracle.DataAccess.dll in the GAC.
gacutil /l Oracle.DataAccess
Or change the timestamp of app.config.
touch.exe app.config -
Oracle.DataAccess.Client.OracleDataAdapter exists in both v2 and v4
Hi there,
I am developing ASP Net application with ODP.NET 11.2.0.2.1 and VS 2010. The target framework is .Net framework 3.5 and I've explicitly Oracle.DataAccess reference to v.2, with
<add assembly="Oracle.DataAccess, Version=2.112.2.0, Culture=neutral, PublicKeyToken=89B483F429C47342"/>
, but when it compiled, it throw error
The type 'Oracle.DataAccess.Client.OracleDataAdapter' exists in both
'c:\WINDOWS\assembly\GAC_32\Oracle.DataAccess\2.112.2.0__89b483f429c47342\oracle.dataaccess.dll'
and 'c:\WINDOWS\Microsoft.NET\assembly\GAC_32\Oracle.DataAccess\v4.0_4.112.2.0__89b483f429c47342\oracle.dataaccess.dll'
c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\esptweb\df172a69\e974c60e\App_Code.eoge0t0f.4.cs
How can I fixed it?
Thanks for the help.Did you try adding that reference using the Add Reference command in Visual Studio instead? I've never seen it behave like this before.
There are two versions of the assembly, but it shouldn't be trying to load the .net 4 version if you have a reference to the .net 2 version and you're in a 2 (or 3.5) app.
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