adgendbc.sh INSTE8_SETUP 1

Autoconfig Fails with error adgendbc.sh INSTE8_SETUP 1
login to database and check

show parameter jit, set it to false from true

alter system set JAVA_JIT_ENABLED= FALSE scope = both;

Bounce both DB and Application Tier and then re-run the autoconfig. The autoconfig will complete successfully

ref:Adgendbc Fails With Database Connection Failure (Doc ID 1302708.1)