multi-threaded client can't clean up threads

When using a multi-threaded remote management client, several threads refuse to clean up, leaving to a deadlocked / frozen thread during a call to client.close().

Simple POJP to be attached, with stack trace. Jars on the classpath are as follows:

jboss-as-controller-client-7.1.0.Final.jar
jboss-as-protocol-7.1.0.Final.jar
jboss-dmr-1.1.1.Final.jar
jboss-logging-3.1.0.GA.jar
jboss-marshalling-1.3.9.GA.jar
jboss-remoting-3.2.2.GA.jar OR jboss-remoting-3.2.7.GA.jar
jboss-sasl-1.0.0.Final.jar
jboss-threads-2.0.0.GA.jar
xnio-api-3.0.3.GA.jar
xnio-nio-3.0.3.GA.jar