Embodiments include methods, and computing systems, and computer program products for automatic discovery and classification of Java virtual machines running on a logical partition of a computing system. Aspects include: examining, via a service request block (SRB) routine, each of address spaces to identify one or more address spaces eligible to operate a Java virtual machine, retrieve, by a Java virtual machine management system via a CSVINFO macro call to each of address space control blocks on the logical partition of the computing system, in a predetermined interval, each of the of Java virtual machines corresponds to one of the address spaces, discovering, through CSVINFO retrieved, one or more Java virtual machines running on the logical partition of the computing system, and classifying, through Content Directory Entries examined using the CSVINFO macro, the one or more Java virtual machines discovered.