FULL PRODUCT VERSION :
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode, sharing)

(Verified that it's still a problem in: http://hg.openjdk.java.net/jdk7u/jdk7u)


FULL OS VERSION :
Applies to ALL OS's.

A DESCRIPTION OF THE PROBLEM :
In hotspot/src/share/vm/gc_interface/gcCause.cpp:

There is not case for _adaptive_size_policy (which is a common condition).

Whenever a cause is printed for this case, the string is: "unknown GCCause", which is quite ambiguous.




THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

REPRODUCIBILITY :
This bug can be reproduced always.