Debug synchronisation job

In Administer > Yamm > Common options you will find the Debug mode option. By enabling this option, Entity parser will provide a lot of output.

You can find this output in two different places:

Watchdog
Go to Administer > Reports > Recent log entries to find them logged through watchdog.
Raw output with DataSync
If you are manually running DataSync in CLI mode with its debug option in command-line arguments, the Entity Parser will output all its debug into stdout. Note that it will also log it to watchdog.

If you enable the DataSync backtrace module, which is currently in active development, you should also be able to catch a lot of DataSync events and associated PHP errors or exceptions through DataSync admin settings pages.

Run massive test and wipe them out

In Administer > Yamm > Common options you will find the Clean state button. The submit function behind will run the hook_yamm_api_clean(), which per default will wipe out all DataSync jobs that any enabled Yamm submodule could have queued.