RTC on WAS is running out of native memory

 WAS automatically will use the -Xcompressedrefs JVM option which compresses the address references to 32bits, however this has the side effect of limiting the object heap to a theoretical 32GB, however because some internal JVM structures need to be allocated below 4GB in this mode, it is possible to run out of address space below 4GB. So to allow unrestricted address space you can add the argument -Xnocompressedrefs to the WAS JVM that will override the implicit WAS setting of -Xcompressedrefs.  The address references would then be 64bits and would allow the entire heap to be used.