For MortalCacheValue, InternalEntryFactory.createValue(Object, long, long, long , long) was doing the following:

if (lifespan > -1 && maxIdle < 0) return new MortalCacheValue(v, lifespan, created);

But the MortalCacheValue constructor was like this:

MortalCacheValue(Object value, long created, long lifespan)

{ super(value); this.created = created; this.lifespan = lifespan; }

So that factory method was mixing up created and lifespan values.
JBMAR externalizer implementations uses this factory method and hence when testing it, the issue arised.