8239013: java.util.logging.Logger catalog cache keeps strong references to ResourceBundles

[Daniel Fuchs]

Hi,

Please find below a fix for:

8239013: java.util.logging.Logger catalog cache keeps strong
          references to ResourceBundles
https://bugs.openjdk.java.net/browse/JDK-8239013

webrev:
http://cr.openjdk.java.net/~dfuchs/webrev_8239013/webrev.00/

java.util.logging.Logger has a `catalog` variable that acts
as a cache and holds a reference to the last resource bundle
that was loaded by the logger.

This fix replaces the strong reference with a weak reference,
allowing the cached object to be garbage collected even in
cases where a strong reference to the logger remains.


best regards,

-- daniel