Hi Guys,

I know its been too long since i last posted and it all happened due to some site authentication issues and some personal priorities. Here I am back with new issues, all related with performance, administration, troubleshooting, optimization and other subjects.

This time would like to share one of the issue that i have faced while installing Oracle 12c Release 2 (Yes, I still do installations, sometimes 🙂 ) on a brand new RHEL7 box where everything was good till I ran root.sh which got failed due to a weird error which initially got no hint behind the problem.
Initially i though if this qualifies to be a post and deserves a place here but actually I have spend few days identifying the cause and hours that I have spend with support, so just want to save all that time for you all who might facing the same issue and looking something on Google 🙂

So lets get started!
This is what exactly I got when ran the root.sh script

[root@8811913-monkey-db1:/u011/app1/12.2.0.1/grid]# ./root.sh
Performing root user operation.

The following environment variables are set as:
    ORACLE_OWNER= oracle
    ORACLE_HOME=  /u011/app1/12.2.0.1/grid

Enter the full pathname of the local bin directory: [/usr/local/bin]:
The contents of "dbhome" have not changed. No need to overwrite.
The contents of "oraenv" have not changed. No need to overwrite.
The contents of "coraenv" have not changed. No need to overwrite.

Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root script.
Now product-specific root actions will be performed.
Using configuration parameter file: /u011/app1/12.2.0.1/grid/crs/install/crsconfig_params
The log of current session can be found at:
  /u011/app1/12.2.0.1/crsdata/8811913-monkey-db1/crsconfig/roothas_2019-02-18_00-59-22AM.log
Site name (8811913-monkey-db1) is invalid.clscfg -localadd -z  [-avlookup]
                 -p property1:value1,property2:value2...

  -avlookup       - Specify if the operation is during clusterware upgrade
  -z   - Specify the site GUID for this node
  -p propertylist - list of cluster properties and its value pairs

 Adds keys in OLR for the HASD.
WARNING: Using this tool may corrupt your cluster configuration. Do not
         use unless you positively know what you are doing.

 Failed to create keys in the OLR, rc = 100, Message:


2019/02/18 00:59:28 CLSRSC-188: Failed to create keys in Oracle Local Registry
Died at /u011/app1/12.2.0.1/grid/crs/install/oraolr.pm line 552.
The command '/u011/app1/12.2.0.1/grid/perl/bin/perl -I/u011/app1/12.2.0.1/grid/perl/lib -I/u011/app1/12.2.0.1/grid/crs/install /u011/app1/12.2.0.1/grid/crs/install/roothas.pl ' execution failed

The error simply said that the script failed to ‘create the keys in OLR’. These keys were for HASD that it was attempting to add. I verified all run time logs that got created the time but they too gave no idea about this problem. That is when I had to engage the Oracle customer support and came to know that this all happened due to a new BUG (BUG 26581118 – ALLOW HOSTNAME WITH NUMERIC VALUE) that comes in to picture when you have the hostname starts with a numeral or number and is an RHEL7 and is specific to Oracle 12c Release 2.

Oracle suggested a bug fix (Patch Number: 26751067) for this issue. This is a MERGE patch and fixes both Bug 25499276 & 26581118. One more thing, you have to apply this patch before the root.sh script.
So let me quickly show how to do that (removing all redundant and other sections).

[oracle@8811913-monkey-db1:/u011/app1/12.2.0.1/grid/OPatch]$ ./opatch napply -oh /u011/app1/12.2.0.1/grid -local 26751067/26751067/
Oracle Interim Patch Installer version 12.2.0.1.6
Copyright (c) 2019, Oracle Corporation.  All rights reserved.

...
......

Patch 26751067 successfully applied.
Log file location: /u011/app1/12.2.0.1/grid/cfgtoollogs/opatch/opatch2019-02-18_01-05-41AM_1.log

OPatch succeeded.
[oracle@8811913-monkey-db1:/u011/app1/12.2.0.1/grid/OPatch]$
[oracle@8811913-monkey-db1:/u011/app1/12.2.0.1/grid/OPatch]$

Ran the root.sh after patching and it went smooth.
BTW, in case you don’t want to do all this, simply change the hostname and put any alphabet in front of your hostname i.e. 8811913 –> A8811913 — That’s It!

Hope It Helps!

Thanks
Prashant Dixit