A DESCRIPTION OF THE PROBLEM :
Javadoc for Unsafe.storeFence() claims that it inserts StoreLoad memory barrier, but actually it transforms to membar_release() which has no such guarantee. StoreLoad is inserted by fullFence() only.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
/**
 * Ensures lack of reordering of loads or stores before the fence
 * with stores after the fence.
 * @since 1.8
 */
public native void storeFence();
ACTUAL -
/**
 * Ensures lack of reordering of stores before the fence
 * with loads or stores after the fence.
 * @since 1.8
 */
public native void storeFence();

URL OF FAULTY DOCUMENTATION :
http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/classes/sun/misc/Unsafe.java