REST connector does not reach the HTTPS endpoint

We have installed Camunda Platform 8 on a Linux server using docker-compose and it’s running (with these modules: elasticsearch, operate, tasklist, zeebe). On a Windows machine we are using Desktop Modeler, and just created a very simple workflow that connects to an HTTPS REST endpoint in the same local network, that returns a JSON string, without authentication or parameters.

But the workflow never passes the REST Connector Task. In Operate we see a green icon on the REST Connector Task box, which we understand that requires an action from the user, but we can’t perform any action with it. We also see no inbound connections in the HTTPS server logs.

These are some checks we made:

  • The HTTPS REST endpoint works and is reachable from the Windows machine with the Modeler, from the Linux server, and from the zeebe Docker container
  • That same BPMN workflow works fine from Camunda Cloud (with a different URL that points to a server on the internet, but it’s also HTTPS and without authentication)
  • Desktop Modeler connects fine to our zeebe instance, and we can see the executions of the workflow by connecting to the Operate web interface.
  • we see no errors in Modeler, Operator, or in the files inside the “logs” folder of the zeebe Docker container

Are there other logs or checks that we can do to see why the request is not working?

Hello @golimarrrr ,

did you setup the connectors next to Camunda 8? Currently, they are not part of the default installation.

You can find an installation guide here: Installation | Camunda Platform 8 Docs

I hope this helps

Jonathan

Thanks, I used another YAML file from the GitHub site that includes the “connectors” module and it now works. Still, just out of curiosity, where is it logged when there is a missing server module?

Hi @golimarrrr,

there is no log about this. The task waits until the connector container picks it up.

It doesn’t know anything about missing server.

This may be a new feature request to list the waiting task topics against the subscribed worker topics.

Hope this helps, Ingo

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