How do App Manager discover OS type?

How do App Manager discover OS type?

Any idea how do App manager discover OS type when you add monitor?

Because I got an error when adding new monitor, which is :
Server type: SunOS 5.8 Generic_117350-20 sun4u sparc SUNW,Sun-Fire-V440.

error: Failed The Selected OS Type is SUN but the actual OS Type is

as you can see the discovered OS is blank.






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