@RenataC5 as per your support ticket INC-B25113 (Is JBOSS EAP 8 supported for Pega 8.x.x?) you were informed that JBOSS EAP8 is not supported for Pega 8.7.x and 8.8.x.
For your follow-up question, please continue to liaise with our GCS team as I can see that you have another open ticket:
INC-B25959 (Post upgrade of JBOSS EAP to 7.4.14 the version 8.8.5 issue(DEV)
That was resolved by setting DISABLE_JDK_SERIAL_FILTER=true will disable jdk.serialFilter.
Based on the documentation , DISABLE_JDK_SERIAL_FILTER=true should be added in $JBOSS_HOME/bin/standalone.conf or $JBOSS_HOME/bin/domain.conf .
You confirmed that as the Java home is used by other applications you cannot disable on higher level and instead you were able to apply it on the node level and set
: java option: -Djdk.serialFilter=* in the as.properties