Cut-thru appears its going to work, but then fails quickly with a flash of a CLI prompt or doesn't do anything.

Products

• VMware Smart Assurance

Issue/Introduction

Symptoms:


Network Configuration Manager Cut-thru fails and the following error messages are displayed in the uiclient.txt on the client computer.  

04 Dec 2017 10:15:12,498-[Thread-749] ERROR com.powerup.configmgr.deviceservice.Tunnel - Couldn't connect to 127.0.0.1:43557 through tunnel server 10.10.10.10:11965
zebedee.ZBDProtocolException: server refused request for redirection to target 127.0.0.1:43557 received 0 back instead
at zebedee.ZBDTunnelClient.negotiate(ZBDTunnelClient.java:363)
at zebedee.ZBDTunnelClient.connect(ZBDTunnelClient.java:201)
at zebedee.ZBDTunnelClient.connect(ZBDTunnelClient.java:130)
at com.powerup.configmgr.deviceservice.Tunnel.connect(Tunnel.java:93)
at com.powerup.configmgr.deviceservice.TunnelFactory.createVoyenceTunnel(TunnelFactory.java:42)
at com.powerup.configmgr.client.app.workspace.cmds.CreateTelnetCutThroughTunnelCmd.execute(CreateTelnetCutThroughTunnelCmd.java:78)
at com.powerup.configmgr.client.mvc.ClientEvent.execute(ClientEvent.java:196)
at com.powerup.configmgr.client.mvc.ClientEvent.executeCmds(ClientEvent.java:184)
at com.powerup.configmgr.client.mvc.awt.ClientController.processClientEvent(ClientController.java:391)
at com.powerup.configmgr.client.mvc.swing.JClientController.processClientEvent(JClientController.java:212)
at com.powerup.configmgr.client.mvc.swing.JClientController$WeakSwingWorker.construct(JClientController.java:135)
at com.powerup.configmgr.client.mvc.swing.SwingWorker.run(SwingWorker.java:249)
at java.lang.Thread.run(Unknown Source)
04 Dec 2017 10:15:12,498-[Thread-750] ERROR com.powerup.configmgr.deviceservice.Tunnel - Error accepting connection on port 0
java.lang.NullPointerException
at com.powerup.configmgr.deviceservice.Tunnel.run(Tunnel.java:124)

Environment

NCM 10.1.x

Resolution

There are several things that can cause the error message and NCM not able complete a cut-thru. 

1. Check and make sure that Pop-blockers are not preventing the Cut-thru from functioning.
2. Make sure the firewall is turned off or not blocking port 11965 between the Client Machine and the Application Server
3. Make sure the firewall is turned off or not blocking port 11966 between the Application/Combination Server and the Device Servers. 
4. Make sure the $VOYENCE_HOME/ncmcore/webapps/voyence/powerup.jnlp file has the correct Application Server IP Address in following line:
   
   <property name="jnlp.server_ip" value="<Application Server IP Address>"/>

For example:

<property name="jnlp.server_ip" value="111.222.333.444"/>