$ java -Xmx160m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=docs/output/heap.hprof -jar target/listener-leak.jar

listener-leak: driving LISTENERS to OOM via unregistered session listeners
listener-leak: sessions opened=300 live listeners=300
listener-leak: sessions opened=600 live listeners=600
listener-leak: sessions opened=900 live listeners=900
java.lang.OutOfMemoryError: Java heap space
Dumping heap to docs/output/heap.hprof ...
Heap dump file created [156718029 bytes in 0.137 secs]

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"
