At the point of running the update.sh script in the update directory, I am getting the following error.
Checking for running process
Check that we are in a directory that resembles the CA Workload Automation directory
Unable to connect to the database. Error message: Io exception: Connection reset
Please refer the PIB #RI83557 to cleanup the unused server detail from the Database.
Due to the update.sh script is checking upon DE configuration data in the database it must be able to connect to it; if the connection is not successful, shown error stops the upgrading routine.
In most cases the nature of the problem lies at networking media (starting from the point of the DE's jdbc), however if the DE installation is made on linux, it might have an issue with the entropy used by jdbc.
In this case, you might try to add the '-Djava.security.egd=file:///dev/urandom' into the VMARGS variable in the update.sh script: