GUACAMOLE-44: Do not wait forever for streams to be notified.

guacamole/src/main/java/org/apache/guacamole/tunnel/StreamInterceptingTunnel.java

@@ -53,6 +53,12 @@ public class StreamInterceptingTunnel extends DelegatingGuacamoleTunnel {
      */
     private static final Logger logger = LoggerFactory.getLogger(StreamInterceptingTunnel.class);
 
+    /**
+     * The maximum number of milliseconds to wait for notification that a
+     * stream has closed before explicitly checking for closure ourselves.
+     */
+    private static final long STREAM_WAIT_TIMEOUT = 1000;
+
     /**
      * Creates a new StreamInterceptingTunnel which wraps the given tunnel,
      * reading and intercepting stream-related instructions as necessary to
@@ -319,7 +325,7 @@ public class StreamInterceptingTunnel extends DelegatingGuacamoleTunnel {
         synchronized (stream) {
             while (streams.get(indexString) == stream) {
                 try {
-                    stream.wait();
+                    stream.wait(STREAM_WAIT_TIMEOUT);
                 }
                 catch (InterruptedException e) {
                     // Ignore