Solution for utility Deinstall fails with “ERROR: null” in Oracle 19c on Linux/RHEL 8

Solution for utility Deinstall fails with “ERROR: null” in Oracle 19c on Linux/RHEL 8


In a recent article, we demonstrated Deinstall Oracle 19c Binaries along with Databases, click here to read more. In this article, we will demonstrate a Solution for utility Deinstall fails with “ERROR: null” in Oracle 19c on Linux/RHEL 8.

I tried to deinstall oracle binary along with removing all services associated with the same ORACLE HOME in Oracle 19c on server type Oracle Linux/RHEL 8 and found an error “ERROR: null” while launching utility deinstall.


ERROR

  • Launch utility deinstall.
[oracle@DBsGuruN3 ~]$ . oraenv
ORACLE_SID = [oracle] ? labdbdup
The Oracle base has been set to /u01/app/oracle
[oracle@DBsGuruN3 ~]$ cd $ORACLE_HOME/deinstall/
[oracle@DBsGuruN3 deinstall]$ ls -lrt deinstall
-rwxr-x---. 1 oracle oinstall 11239 Oct 26 12:50 deinstall
[oracle@DBsGurun5 deinstall]$ ./deinstall
Checking for required files and bootstrapping ...
Please wait ...
Location of logs /tmp/deinstall2021-12-27_04-16-23PM/logs/

############ ORACLE DECONFIG TOOL START ############


######################### DECONFIG CHECK OPERATION START #########################
## [START] Install check configuration ##


Checking for existence of the Oracle home location /u01/app/oracle/product/19.0.0/db_1
Oracle Home type selected for deinstall is: Oracle Single Instance Database
Oracle Base selected for deinstall is: /u01/app/oracle
Checking for existence of central inventory location /u01/app/oraInventory
ERROR: null


  • Deinstall error log.
java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at oracle.install.db.deinstall.wrapper.Deinstall.callCheckImpl(Deinstall.java:1449)
	at oracle.install.db.deinstall.wrapper.Deinstall.main(Deinstall.java:732)
Caused by: java.lang.ExceptionInInitializerError
	at oracle.ops.verification.framework.util.Assert.assertPath(Assert.java:601)
	at oracle.cluster.verification.ClusterVerification.setPreReqXmlFile(ClusterVerification.java:9059)
	at oracle.install.db.deinstall.core.CheckInstall.checkConfig(CheckInstall.java:1083)
	... 6 more
Caused by: java.lang.NullPointerException
	at oracle.ops.verification.framework.storage.StorageUtil.<clinit>(StorageUtil.java:194)
	... 9 more


This is a known issue while OS Check performed by CVU on Oracle Linux/RHEL 8.


SOLUTION

Let’s move to the solution, We have two types of solutions to fix this issue.

1. Either apply/install 19.7 OCW RU Patch and then execute utility deinstall.

We can see in the below output of patch status which is 19.3.

[oracle@DBsGuruN3 deinstall]$ cd $ORACLE_HOME/OPatch
[oracle@DBsGuruN3 OPatch]$ ./opatch lspatches
29585399;OCW RELEASE UPDATE 19.3.0.0.0 (29585399)
29517242;Database Release Update : 19.3.0.0.190416 (29517242)

OPatch succeeded.
[oracle@DBsGuruN3 OPatch]$


2. Or the second solution is to set the environment variable CV_ASSUME_DISTID=OL7 as binary owner Oracle then execute utility deinstall. Below are detailed steps for the same:

[oracle@DBsGuruN3 deinstall]$ export CV_ASSUME_DISTID=OL7
[oracle@DBsGuruN3 deinstall]$ ./deinstall
Checking for required files and bootstrapping ...
Please wait ...
Location of logs /tmp/deinstall2021-12-27_04-23-39PM/logs/

############ ORACLE DECONFIG TOOL START ############


######################### DECONFIG CHECK OPERATION START #########################
## [START] Install check configuration ##


Checking for existence of the Oracle home location /u01/app/oracle/product/19.0.0/db_1
Oracle Home type selected for deinstall is: Oracle Single Instance Database
Oracle Base selected for deinstall is: /u01/app/oracle
Checking for existence of central inventory location /u01/app/oraInventory

## [END] Install check configuration ##


Network Configuration check config START
=========Trimmed Data=========
####################### DEINSTALL CLEAN OPERATION SUMMARY #######################
Successfully detached Oracle home '/u01/app/oracle/product/19.0.0/db_1' from the central inventory on the local node.
Successfully deleted directory '/u01/app/oracle/product/19.0.0/db_1' on the local node.
Successfully deleted directory '/u01/app/oraInventory' on the local node.
Oracle Universal Installer cleanup was successful.


Run 'rm -r /etc/oraInst.loc' as root on node(s) 'DBsGuruN3' at the end of the session.

Run 'rm -r /opt/ORCLfmap' as root on node(s) 'DBsGuruN3' at the end of the session.
Run 'rm -r /etc/oratab' as root on node(s) 'DBsGuruN3' at the end of the session.
Review the permissions and contents of '/u01/app/oracle' on nodes(s) 'DBsGuruN3'.
If there are no Oracle home(s) associated with '/u01/app/oracle', manually delete '/u01/app/oracle' and its contents.
Oracle deinstall tool successfully cleaned up temporary directories.
#######################################################################


############# ORACLE DEINSTALL TOOL END #############


This document is just for learning purpose and always validate in the LAB environment first before applying in the LIVE environment.


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