How to fix the Oracle error PGA-21017: RRM already active for LU string?

In this post, you’ll learn more about the Oracle ErrorPGA-21017: RRM already active for LU string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PGA-21017: RRM already active for LU string

Reason for the Error PGA-21017: RRM already active for LU string

Cause: The RRM has already been started for the local LU . A second RRM cannot be started for the same local LU.

How to fix the Error PGA-21017: RRM already active for LU string ?

You can fix this error in Oracle by following the below steps

Action: Determine whether the RRM is still active and functioning. If it is not, then it may have terminated without cleaning up. On AIX systems, the /tmp/o/e file may still exist. This will prevent a new RRM from being started. If you have verified that the original RRM is no longer running, you can delete the file to allow a new copy of the RRM to be started.