topic Re: Communication Link failure in Talend Studio

Communication Link failure

Bjorn2 — Fri, 15 Nov 2024 23:37:38 GMT

Hi, we have just installed Talend on premise with a Talend Admin Center Server and one Talend Job Server. We have just deployed our first job to the jobserver in job conductor and try to run it from there. We get an error immediately saying Communication Link Failure. The Talend products are running on Ubuntu and MySQL8 which is our database server is running on Windows server. We can connect to the database via MySQL Workbench so we don't see any firewall issues. When running wireshark agains the db server we can see no communication on port 3306.

Here is a screenshot from the log on the jobserver and the server page in TAC.

Any help would be appreciated!

Re: Communication Link failure

Anonymous — Thu, 14 Oct 2021 03:06:50 GMT

Hello,

From above error message, it looks like you have a database connection error, could you please check below points?

Do you have a prepared database server (and database and tables)?
Do you use proper credentials?
Do you use proper connection settings?
Are you able to access this server with this credentials from this PC without using Talend?

Best regards

Sabrina

Re: Communication Link failure

Bjorn2 — Thu, 14 Oct 2021 06:03:30 GMT

Hi, thanks for response.

Yes we have a database server with a database schema created but no tables in it. The job has a "create table if not exists" setting.
Yes, the credentials we tried out on MySQL Workbench so they are ok.
We use the same connection settings as in a development environment when running the job directly from Talend Studio and this works. The difference here is that we use MySQL 8 here and in development we use MySQL5. But we use the right drivers for MySQL8 now.
Yes, via MySQL Workbench,