upgrade to AE 11.3.6 SP7 cannot connect to the databases

Document ID : KB000097085
Last Modified Date : 18/05/2018
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When attempting to upgrade AE to 11.3.6 SP7, the wa_setup.sh reports errors attempting to connect to the databases. But from the same command prompt using the same database information and credentials we are able to connect to both the primary and the secondary DB servers using sqlplus.
It was found that one of the $AUTOUSER/config.$AUTOSERV files contained an EventServer_2 entry that was commented due to an automatic database rollover. Once the client synced the databases and un-commented the second database entry the wa_setup.sh was able to connect to the databases without errors and they were able to proceed with the upgrade.