Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 







ORA-29701: Unable to connect to Cluster Manager Tips

Oracle Database Tips by Donald BurlesonNovember 5, 2015

Question:  What causes the ORA-29701 error below?  Can you explain how to connect to the cluster manager properly?

ORA-29701: Unable to connect to Cluster Manager.

Answer:  The oerr utility shows this for the ORA-29701 error:

ORA-29701:  unable to connect to Cluster Manager

Cause: Connect to CM failed or timed out.

Action: Verify that the CM was started. If the CM was not started, start it and then retry the database startup. If the CM died or is not responding, check the Oracle and CM trace files for errors.

As we see, the fix for the ORA-29701 error is to start the connection manager (CM).

If you have the available downtime, try bouncing the whole RAC cluster, this will often fix the ORA-29701 error.

The first step is to check the CM logs for errors and ensure that the CM is running. 

ps -ef|grep cm| grep -i grep|more

oracle 44456 1 0 15:29:12 pts/3 0:00 /u01/oracle/product/8.0.5/bin/cmadmin 
oracle 46508 1 0 15:29:14 pts/3 0:00 /u01/oracle/product/8.0.5/bin/cmgw

If the CM is not running, start the CM:

$ ./cmctl status

See my notes on CM starting and testing.

Also see these MOSC notes on troubleshooting the ORA-29701 error:

  • Note 1376731.1

  • Note 735804.1

  • Note 1050908.1 titled "How to troubleshoot RAC CRS startup issues". 

  • Note 1423243.1 titled "ASM can't Start with ORA-29701 and ORA-01078 in SIHA"

Also see my notes on CRS startup issues.

Osama Mustafa notes that the ORA-29701 can also happen when the cssd daemon is not running and he lists his solution to the ORA-29701 error:

The reason is Oracle cssd daemon process was not running.

As Root User :

Step 1: Go to the /etc folder
Step 2: Execute the following command.
# init.cssd start
startup will be queued to init within 30 seconds

Step 3: Wait for 2 minutes and execute the following commands
# cd $ORACLE_HOME/bin
# ./localconfig delete
Stopping CSSD
Failure in CSS initialization opening OCR.
Shutdown has begun. The daemons should exit soon.

Step 4: Execute the following command

# ./localconfig add
Successfully accumulated necessary OCR keys.
Creating OCR keys for user root, privgrp 'system'
Operation Successful
Configuration for local css has been initialized.
Adding to inittab
Startup will be queued to init within 30 seconds
Checking the status of new oracle init process..
Expecting the CRS daemons to be up within 600 seconds
CSS is active on these nodes
CSS is active on all nodes
Oracle CSS service is installed and running under init(1M)

Step 5: Start the ASM instance now.
Get the Complete
Oracle SQL Tuning Information 

The landmark book "Advanced Oracle SQL Tuning  The Definitive Reference"  is filled with valuable information on Oracle SQL Tuning. This book includes scripts and tools to hypercharge Oracle 11g performance and you can buy it for 30% off directly from the publisher.



Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.



Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster