CRS-00184: Cannot communicate with the CRS daemon on Oracle RAC


Sometimes You can get “CRS-00184: Cannot communicate with the CRS daemon ” error.


Details of error are as follows.

CRS-00184: Cannot communicate with the CRS daemon.
Cause: The CRS daemon on the local node is either not running or there was an internal communication error with the CRS daemon.
Action: Check if the CRS daemon process is running on the local node.

This Error is related with the Interconnect ( private ) network down, so check Private network.


To solve this error, stop and start the Oracle RAC services as follows.

[root@msdbadm01 ~] cd $GRID_HOME/bin
[root@msdbadm01 bin] crsctl stop cluster -all
[root@msdbadm01 bin] crsctl start cluster -all


And check all services if they are online or not.

[root@msdbadm01 bin] crsctl check crs

[root@msdbadm01 bin] crsctl status resource -t

[root@msdbadm01 bin] crsctl check cluster -all



Do you want to learn more details about Oracle RAC, then read the following articles.

What is the Oracle RAC and Architecture of Real Application Cluster


Oracle RAC Step by Step Installation on Linux -3



About Mehmet Salih Deveci

I am Founder of SysDBASoft IT and IT Tutorial and Certified Expert about Oracle & SQL Server database, Goldengate, Exadata Machine, Oracle Database Appliance administrator with 10+years experience.I have OCA, OCP, OCE RAC Expert Certificates I have worked 100+ Banking, Insurance, Finance, Telco and etc. clients as a Consultant, Insource or Outsource.I have done 200+ Operations in this clients such as Exadata Installation & PoC & Migration & Upgrade, Oracle & SQL Server Database Upgrade, Oracle RAC Installation, SQL Server AlwaysOn Installation, Database Migration, Disaster Recovery, Backup Restore, Performance Tuning, Periodic Healthchecks.I have done 2000+ Table replication with Goldengate or SQL Server Replication tool for DWH Databases in many clients.If you need Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS Consultancy and Training you can send my email adress [email protected].-                                                                                                                                                                                                                                                 -Oracle DBA, SQL Server DBA, APPS DBA,  Exadata, Goldengate, EBS ve linux Danışmanlık ve Eğitim için  [email protected] a mail atabilirsiniz.

Leave a Reply

Your email address will not be published. Required fields are marked *