Debugging Gateway Module

I’m looking for some help getting module debugging to work.

I want to debug my gateway module code in Eclipse.
NOTE: The same outcomes occur when I attempt to debug the sample Ignition gateway modules provided with the SDK.

The first time I run the debug configuration, nothing happens (even if I put breakpoints in the code). If I run the debug configuration again, I get a “Failed to connect to remote VM. Connection refused. Connection refused: connect” error.

What I’ve done:

  1. I uncommented the two lines as per the Programmer’s Guide to enable debugging and I created the debug configuration.
  2. I ran netstat to make sure port 8000 is available and listening.
  3. I tried adding incoming and outgoing firewall rules to allow all communications on port 8000 and stopping the firewall.
  4. I tried using JDK 7 and JDK 8.
  5. I stopped IIS (just in case for some reason that was conflicting…).
  6. I tried using a different port (port 8001).


  1. Checking wrapper.log, there are a lot of “ COM object method returns error code: 0x80040154; REGDB_E_CLASSNOTREG (Class not registered)” errors, which I’m guessing is related to OPC and not the debugging functionality. There were a few “oejw.StandardDescriptorProcessor:WrapperSimpleAppMain: NO JSP Support for /main, did not find org.apache.jasper.servlet.JspServlet” messages in wrapper.log, but these do not seem to occur regularly and actually haven’t happened for awhile.

Please help! Any suggestions?

Are you trying to debug a gateway on the same machine you’re running Eclipse on or a remote one? Did you restart Ignition after uncommenting the remote debugging lines?

I’m trying to debug an Ignition gateway on the same machine that Eclipse is running on. I restarted Ignition and even the entire machine.