Hi,
jstat is designed to handle the case where a perf counter doesn't exits.
In the output jstat will then print a "-" instead of the perf counter
value to indicate that the counter doesn't exist. However, jstat also
prints an unnecessary message, which clobbers the output. This message
might still be useful for debugging, but should only be printed when
jstat is running with debug messages enabled
(-J-DExpressionResolver.debug=true).
Webrev: http://cr.openjdk.java.net/~pliden/8191846/webrev.0/
Bug: https://bugs.openjdk.java.net/browse/JDK-8191846
Testing: hs-tier1, hs-tier2
/Per
