#TODO: global WAIT_FOR_TASK_COMPLETION_id instead of callerName has to be backported to ParallelExec and osync / obackup / pmocr ocde
## Logger sets {ERROR|WARN}_ALERT variable when called with critical / error / warn loglevel
## When called from subprocesses, variable of main process cannot be set. Status needs to be get via $RUN_DIR/$PROGRAM.Logger.{error|warn}.$SCRIPT_PID.$TSTAMP