[SOLVED] Eclipse Hono command line client is not able to connect to Hono on Sandbox

Issue

I am trying to use the Hono Sandbox as described in "Getting started with Eclipse Hono".

I followed all steps but when starting the command line client I can't connect to the server:

12:43:22.465 [vert.x-eventloop-thread-0] INFO  o.e.h.client.impl.HonoConnectionImpl - max 
number of attempts [5] to re-connect to server [hono.eclipseprojects.io:15672, role: unknown] have been made, giving up

12:43:22.489 [vert.x-eventloop-thread-0] INFO  o.e.h.client.impl.HonoConnectionImpl - stopping connection attempt to server [hono.eclipseprojects.io:15672, role: unknown] due to terminal 
error

io.vertx.core.VertxException: Disconnected

Even starting the client with:

java -jar hono-cli-*-exec.jar --hono.client.host=hono.eclipseprojects.io --hono.client.port=15672 --hono.client.username=consumer@HONO --hono.client.password=verysecret --tenant.id=DEFAULT_TENANT --device.id=4711 --spring.profiles.active=receiver

doesn't work. As far as I understand this means, that there is a problem with the network. Verifying that I can access all necessary ports is successful:

curl -sIX GET http://hono.eclipseprojects.io:28080/v1/tenants/DEFAULT_TENANT

HTTP/1.1 200 OK
etag: ed4151c3-e694-460e-a21d-c68d5e40411e
content-type: application/json; charset=utf-8
content-length: 16

And I am able to ping the address (hono.eclipseprojects.io) and access the port (4711).

• I am working on an Raspberry 3B+
• The JDK version I use:

java -version 
openjdk version "11.0.9" 2020-10-20
OpenJDK Runtime Environment (build 11.0.9+11-post-Raspbian-1deb10u1)
OpenJDK Server VM (build 11.0.9+11-post-Raspbian-1deb10u1, mixed mode)

I highly appreciate any suggestion or idea.

Thanks alot in advance!

Solution

Thanks for reporting, the Let's Encrypt certificate we are using with the Sandbox had expired. Should work again ...

Answered By - Kai Hudalla