For java applications targeted to run on the compact1 profile of jdk8 to use nashorn, nashorn must not itself use any JDK8 APIs that are not in compact1. A scan of nashorn.jar today using jdeps reveals the use of some APIs from the compact3 profile. This usage should be removed.

jdeps -profile /d/jdk8/jre/lib/ext/nashorn.jar |grep compact3
d:\jdk8\jre\lib\ext\nashorn.jar -> d:\jdk8\jre\lib\rt.jar (compact3, JDK internal API)
      -> java.lang.management compact3

jdeps -profile -verbose:class /d/jdk8/jre/lib/ext/nashorn.jar |grep management
      -> java.lang.management.ManagementFactory compact3
      -> java.lang.management.MemoryPoolMXBean compact3
      -> java.lang.management.MemoryUsage compact3

a quick scan of the nashorn sources reveals the usage is in
src/jdk/nashorn/internal/ir/debug/ObjectSizeCalculator.java