ADDITIONAL SYSTEM INFORMATION :
Version:
openjdk 12.0.2 2019-07-16
OpenJDK Runtime Environment AdoptOpenJDK (build 12.0.2+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 12.0.2+10, mixed mode, sharing)

Centos/7
Kernel: 3.10.0-862.14.4.el7.x86_64

A DESCRIPTION OF THE PROBLEM :
If Shenandoah is turned on with the command line parameters

   -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC

then NUMAInterleaving is forced on, even if it is explicitly turned off with

   -XX:-UseNUMAInterleaving

To reproduce, run

    java -XX:+PrintFlagsFinal -XX:-UseNUMAInterleaving -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC --version | grep UseNUMAInterleaving
   
You should see the following output:

    bool UseNUMAInterleaving = true {product} {command line}



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the following command:

    java -XX:+PrintFlagsFinal -XX:-UseNUMAInterleaving -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC --version | grep UseNUMAInterleaving
   

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
bool UseNUMAInterleaving = false {product} {command line}
ACTUAL -
 bool UseNUMAInterleaving = true {product} {command line}

CUSTOMER SUBMITTED WORKAROUND :
Disable Shenandoah GC

FREQUENCY : always