@@ -0,0 +1,408 @@
+package net.floodlightcontroller.util;%0A%0Aimport java.io.PrintWriter;%0Aimport java.io.StringWriter;%0A%0A/** %0A * Utility class to get a stacktrace as a nice string%0A * %0A * @author gregor%0A *%0A */%0A%0Apublic class StackTraceUtil %7B%0A    public static String stackTraceToString(Throwable t) %7B%0A        StringWriter sw = new StringWriter();%0A        t.printStackTrace(new PrintWriter(sw));%0A        return sw.toString();%0A    %7D%0A%7D%0A

Add try-catch clauses around all update queues.