AMQ is utilizing a very high number of file descriptors after a recent JDK upgrade

Issue

• AMQ is holding too many open file descriptors with very few established connections.
• AMQ is failing with java.net.SocketException: Too many open files and java.io.IOException: Too many open files after a recent JDK update.
• lsof on the AMQ process shows a high number of sockets of type "sock" :

java    1902 user  440u     sock                0,7       0t0 864742213 protocol: TCPv6
java    1902 user  441u     sock                0,7       0t0 864822414 protocol: TCPv6
java    1902 user  442u     sock                0,7       0t0 864129821 protocol: TCPv6
java    1902 user  443u     sock                0,7       0t0 864329774 protocol: TCPv6
java    1902 user  444u     sock                0,7       0t0 864929720 protocol: TCPv6
java    1902 user  445u     sock                0,7       0t0 864929675 protocol: TCPv6
java    1902 user  446u     sock                0,7       0t0 864929633 protocol: TCPv6