Question

Database link throws ORA-02085 on one database, but none of the others

Asked by: AptDev

I use DATABASE LINKS on my reporting database, against each of several other Oracle 8i databases.  All of the database links are working fine... except one.  

Many of the databases, including the reporting database, and the offending database, are on the same server.

I rebuild each database link, logging on to my database REPORTING.enterprise.com, an running the following set of queries:

ALTER SESSION SET global_names = FALSE ;

ALTER DATABASE RENAME global_name TO anything.ENTERPRISE.COM ;

DROP PUBLIC DATABASE LINK DB6.ENTERPRISE.COM ;

ALTER DATABASE RENAME global_name TO REPORTING.ENTERPRISE.COM ;

CREATE public DATABASE LINK DB6.ENTERPRISE.COM  CONNECT TO myuser IDENTIFIED BY mypwd USING 'DB6.ENTERPRISE.COM' ;

ALTER SESSION SET global_names = TRUE;


When I go to run a query against the database links, this is what I get:

select * from currency@DB5.enterprise.com
3 row(s) retrieved

select * from currency@DB6.enterprise.com
[1]: (Error): ORA-02085: database link DB6.ENTERPRISE.COM connects to PROD2.ENTERPRISE.COM

Now... it's true that the database DB6 was created from an export of PROD2... but so was DB5.  Why would one of them fail, while the others succeed?  And the DatabaseLink to the original production database PROD2 works just fine.  What would make the link to one of the databases (created from an export of that production machine) fail, while the links to other databases (created from exports of that same production machine) work just fine?

Any ideas?

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2008-09-22 at 08:38:10ID23751767
Tags

Oracle

,

Database

,

8i

Topics

Oracle 8.x

,

Oracle Database

Participating Experts
2
Points
500
Comments
9

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. Windows 95 Rebuild
    Okay guys an easy one! Can anbody provide, or show me where on the 'Net I may find a step by step guide to rebuilding a Windows 95 PC from scratch, including:- 1. Software and boot disks required, and what they contain. 2. How to partition a drive into at least two partition...
  2. Connect to Oracle throw ADO
    Hi anywhere, my application in C++ working with another databases throw ADO. With Oracle connect I receive errors, when any methods are not supported. (recordset->AddNew(,...). I am using oracle provider from Microsoft. (msdaora). With ODBC I have similar problem. Exists ...
  3. Rebuild indexes
    Hi, My application is running very slowly... And I'd like to rebuild my indexes to increase the speed. I have a table which contains over 120 000 records, and when I execute this line : "ALTER INDEX IDX_AGENT_NAME REBUILD;" It takes only few seconds.... But I kno...
  4. Rebuilding index
    i have an index in my database which has 155 extents, its 675M in size. i've tried rebuilding it but it comes up with the error message " Cannot extend TEMP tablespace by 112000". i've increased the datafile size of the temp tablespace now it stands at 1500M but sti...
  5. rebuild
    How rebuilding is possible for index?
  6. rebuilding Indexes
    We are running the below script every week. We are not rebuilding Indexes every week. Is it a good Idea to rebuild Indexes every week or periodically.(All the indexes in the database) We have a OLTP database. we are not facing any performance problem yet EXECUTE DBMS_STATS....

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: kazman300Posted on 2008-09-22 at 08:48:39ID: 22541086

What is the db_name and db_unique_name of the DB6 database?

sqlplus / as sysdba
show parameter db_

 

by: kazman300Posted on 2008-09-22 at 09:02:27ID: 22541222

DB6.ENTERPRISE.COM connects to PROD2.ENTERPRISE.COM
Suggests that the db_name (or db_unique_name) hasn't been set to DB6, looks like it's still at PROD2.

 

by: AptDevPosted on 2008-09-22 at 09:09:12ID: 22541307

It tells me the DB_NAME = DB6
I can't see a DB_UNIQUE_NAME anywhere in the list...

 

by: kazman300Posted on 2008-09-22 at 09:17:57ID: 22541381

Can you TNSPING the DB6 from the host that your commands are running from and can you SQLPLUS to the DB6 instance?

 

by: kazman300Posted on 2008-09-22 at 10:04:42ID: 22541846

Also, if you drop the link and then recreate it with global_names=TRUE, do you get an error?

 

by: AptDevPosted on 2008-09-22 at 10:53:48ID: 22542265

- DB6 tnspings just fine
- I can log into DB6 directly and execute queries just fine
- When I log into my REPORTING database and drop the DatabaseLink and try to connect, it throws an error that says it doesn't exist (of course), and I can recreate the DatabaseLink with globalnames = true, just fine... but then, when I query against the DatabaseLink, it goes back to giving me the error that says it's pointing to the other database.

When set global_names = false on my REPORTING database, I can query using the DatabaseLink to DB6 just fine!  But the moment I turn global_names back to true, I start getting the error that it's pointing to the wrong database again.

 

by: kazman300Posted on 2008-09-23 at 01:20:23ID: 22547255

Can you paste in the results from "show parameters" as it does look like it has a global name of PROD2?

 

by: shajukgPosted on 2008-09-23 at 01:35:37ID: 22547321

log in directly to DB6

issue the command


select * from global_name;

it will be "PROD2.ENTERPRISE.COM"

ALTER THE DATABSE

ALTER DATABASE  
   RENAME GLOBAL_NAME TO 'DB6.ENTERPRISE.COM';

NOW TRY UR DBLINK

 

by: AptDevPosted on 2008-09-23 at 11:03:59ID: 31498862

Excellent!  It worked like a charm!  You rock!

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...