This is caused by JDK-8173607 due to the rename of sun.management.ConnectorAddressLink class.

--- old/src/jdk.jconsole/share/classes/sun/tools/jconsole/JConsole.java 2017-02-05 16:37:26.768771419 +0100
+++ new/src/jdk.jconsole/share/classes/sun/tools/jconsole/JConsole.java 2017-02-05 16:37:26.597774358 +0100
@@ -954,7 +954,7 @@
         boolean supported;
         try {
             Class.forName("com.sun.tools.attach.VirtualMachine");
- Class.forName("sun.management.ConnectorAddressLink");
+ Class.forName("jdk.internal.agent.ConnectorAddressLink");
             supported = true;
         } catch (NoClassDefFoundError x) {
             supported = false;