I have this error that I cannot solve.
I switched from Penthao Kettle 6.1 to 8.2 and 8.3 but on both the last 2 versions I have this error.
Randomly, in a transformation called by many jobs, in the first step where a select DB operation is performed (I tried both the step database join and table input) the job goes into freeze and in the log (raised to detailed) "Triggering heartbeat signal for <Job name> at every 10 seconds" is written.
I found this error reported by others on the web but no one has solved it.
Thinking of a thread synchronization problem (even if my transformation has only one record read from the SQL query) I tried to change the Transformation engine type from normal to Serial Single Threaded (Experimental!) And Single Threaded (Designed for Hadoop) but nothing.
I also tried to eliminate the transformation by directly inserting the steps in another transformation used by one of these jobs but the same error always in the same step.
I have set up a DB connection both with and without, nothing.
Has anyone had the same error message and tell me how to do it?
I really don't know what to catch anymore.

Pentaho Data Integration Community Edition 8.3
Microsoft SQL Server Standard Edition (64-bit) 13.0.4001 SP1
JDBC driver mssql-jdbc-7.2.1.jre8.jar