Issues having two connectors talk to each other on a local machine

[Vincent-UBT]

Hi everyone!

After some time of testing the Dataspace Connector, I still have an issue trying to have two Dataspace Connectors talk to each other. Help on this would be appreciated very much. Here's what I did so far:
(1) I cloned the repository twice, in two directories on my VM running Ubuntu (latest LTS version).
(2) I amended the ports in one of the two connectors to localhost:8081 instead of the default localhost:8080 in two files: the docker-compose.yml and in application.properties.
(3) I follow the documentation and create data resource, representation, and actual data on one of the connectors (the 8080 one).
(4) I try to read the metadata of the 8080 connector from the 8081 connector using the /admin/api/request/description through the Swagger UI, passing https://localhost:8080/api/ids/data as the recipient.
(5) Subsequently, I receive an error:

{ "timestamp": "2020-12-09T10:12:32.659+0000", "status": 500, "error": "Internal Server Error", "message": "proxy.dortmund.isst.fraunhofer.de", "path": "/admin/api/request/description" }

Both connectors are running in Docker, I followed your recommendations regarding proxy settings, meaning I deleted them altogether in config.json after I got the same error using the default proxy settings. Do you have any hints on where I went wrong there? Thank you in advance!

[juliapampus]

Hi Vincent,

I could not reproduce your problem so far. Are you using the current dev branch (updated yesterday) or some version before? We changed the error handling, so I may get a different response than you do. Furthermore, did you remove the Postgres from the docker-compose.yml or not? I guess you should start running two connectors in Docker by using one docker-compose.yml, not two. We will deal with a complete setup with two connectors and two external databases as soon as possible.

For an easy start, I suggest you either start two connectors locally simply using Maven for building a .jar file and runnig it with Java. Or you take a look at the docker-compose.yml in the docker-test setup and copy it to your project folder. Furthermore, you need to remove the proxy settings from the connector's config.json and remove the SSL settings from the application.properties as the provided certificate for localhost is known to cause some problems in a Docker setup. For IDS communication, you can then follow the description at https://github.com/FraunhoferISST/DataspaceConnector/tree/v3.2.1#docker-setup.

Please let me know if you wer able to get the setup running.

Kind regards,
Julia

[Vincent-UBT]

Hi Julia,

thank you very much for the support! I managed to get the setup running with your recommendation. In addition, I was using an older version from some weeks ago, which might explain the differing response.

Best Regards
Vincent