pool-146

Note that this program is modified on Apache Common Pool project.

To checkout the original project:

#BUGGY
svn co -r 791286 http://svn.apache.org/repos/asf/commons/proper/pool/trunk

#FIXED
svn co -r 791295 http://svn.apache.org/repos/asf/commons/proper/pool/trunk

Acknowledgement:

This bug was prepared and submitted to SIR by Yu Lin.
