It is always a trouble maker for us, when we lost the internet connection, server get rebooted, or your own machine/laptop gets rebooted while doing Oracle installation/cluster upgrade.
So when you are upgrading your grid infrastructure from 12c to 19c, rootupgrade.sh take 30mins-45mins to complete per node. So till then your GUI session will be unattended.
Oracle came up with a solution for us. We can only execute after 11.2/12c
Grid Infrastructure root script (root.sh or rootupgrade.sh) is finished successfully on all nodes.
So if it happened with you as well, you can use following syntax to start the post root.sh or rootupgrade.sh
How to Upgrade Oracle Grid Infrastructure from 12c to 19c ( RAC ) in Rolling Fashion
How to Upgrade Oracle Grid Infrastructure Single Instance ASM from 12c to 19c (ORACLE RESTART)
Solution Given by Oracle To Complete Grid Infrastructure Upgrade when GUI is lost
To Complete Grid Infrastructure Upgrade when GUI is lost, you have to execute following command once rootupgrade.sh was completed successfully on both the nodes. for 19c what we did ->
gridSetup.sh -executeConfigTools -responseFile <response file>
Using the Installation Response File for Postinstallation Configuration
Location of response file will be –> $ORACLE_HOME/install/response/product_timestamp.rsp
For Instance, when I was upgrading my grid infrastructure, I lost the GUI since we have limitation over the session if it stays idle for over 45 mins it gets disconnected. And caused the problem for me. Hence I raised an SR for this and got an solution ->
cd /GRIDHOME/oracle/app/product/grid/19.3.0 ./gridSetup.sh -executeConfigTools -responseFile /GRIDHOME/oracle/app/product/grid/19.3.0/install/response/grid_2020-08-07_09-17-48PM.rsp
This way it will completed all the post configuration after completion of rootupgrade.sh on both the nodes. This is how we can tackle and Complete Grid Infrastructure Upgrade when GUI is lost
Reference – How to Complete Grid Infrastructure Configuration Assistant(Plug-in) if OUI is not Available ( Doc ID 1360798.1 )