Auto-merging via docker-versions-create

# Conflicts:
#	.github/workflows/build-multiarch.yml
#	Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-FROM adoptopenjdk:8-jre-openj9
+FROM adoptopenjdk:16-openj9
 
 LABEL org.opencontainers.image.authors="Geoff Bourne <itzgeoff@gmail.com>"
 

start-configuration

@@ -103,6 +103,14 @@ case "${TYPE^^}" in
   ;;
 
   FORGE)
+    if versionLessThan 1.17; then
+    log "**********************************************************************"
+    log "WARNING: The image tag itzg/minecraft-server:java8 is recommended"
+    log "         since some mods require Java 8"
+    log "         Exception traces reporting ClassCastException: class jdk.internal.loader.ClassLoaders\$AppClassLoader"
+    log "         can be fixed with java8"
+    log "**********************************************************************"
+    fi
     exec ${SCRIPTS:-/}start-deployForge "$@"
   ;;
 
@@ -115,6 +123,12 @@ case "${TYPE^^}" in
   ;;
 
   FTB|CURSEFORGE)
+    log "**********************************************************************"
+    log "WARNING: The image tag itzg/minecraft-server:java8 is recommended"
+    log "         since some mods require Java 8"
+    log "         Exception traces reporting ClassCastException: class jdk.internal.loader.ClassLoaders\$AppClassLoader"
+    log "         can be fixed with java8"
+    log "**********************************************************************"
     exec ${SCRIPTS:-/}start-deployCF "$@"
   ;;