I have been facing a similar issue where the logs are viewable through the log previewer option through the magnifier icon. The logs appear during the execution of the job. And after the job completes, when i come back to view this execution log , the dont appear. Even thought the log file is available under both TAC server : executionlogs and jobserver execution logs folder.
Talend named a Leader.
Kickstart your first data integration and ETL projects.
Learn how to do cool things with Context Variables
Find out how to migrate from one database to another using the Dynamic schema
Pick up some tips and tricks with Context Variables