question: private void addEventFromProperty ( String evt , HadoopJobInfo info , String propName ) { String val = info . property ( propName ) ; if ( ! F . isEmpty ( val ) ) { try { evts . add ( new T2 < > ( evt + " " + nodeId , Long . parseLong ( val ) ) ) ; } catch ( NumberFormatException e ) { throw new IllegalStateException ( "Invalid value '" + val + "' of property '" + propName + "'" , e ) ; } } }
target:  Adds event with timestamp from some property in job info.