Jobagent not connecting properly to server

kayman

I'm experimenting a bit with user agents on different machines / operating systems to allow for better scaling, but I get an issue trying to do so.
My server instance is running on a Ubuntu server, my agent on a windows 10 machine. While the server notices the agent is running (orange light) the agent itself keeps spawning the following error statement :

2019-06-16 16:57:00.380 ERROR 6020 --- [taskScheduler-3] c.r.e.jobagent.scheduled.SyncTasks       : Sync cannot be completed. Cause: Failed to check whether sync service is enabled. HTTP response code was: 401

Anything specific I would need to allow on my server / agent host to get it running?

aschaferdiek

Hi kayman,

this behavior is caused by a clock difference on both machines. The agent's clock is probably not the same as the clock on the machine where RapidMiner Server is running. The agent will create a Json Web Token (JWT) to access RapidMiner Server and if the clocks are not synchronized the JWT which has been created in the agent to access RapidMiner Server is invalid because basically the time comparison fails.

There are two possible solutions to the problem

1. Synchronize the clocks so they are exactly the same on both machines

2. Use today's released 9.3.1 version of RapidMiner Server which has introduced a clock offset tolerance mechanism

To see the entire changelog of the new version of RapidMiner Server, please visit https://docs.rapidminer.com/latest/server/releases/changes-9.3.1.html

I hope this helps.

sgenzer

@Edin_Klapic?

kayman

Thanks @aschaferdiek, upgrading to 9.3.1 did make it work indeed. I've tried with setting the clocks (almost) equal before the upgrade but that didn't really work.