How to convert .txt file to Hadoop's sequence file format

Question

To effectively utilise map-reduce jobs in Hadoop, i need data to be stored in hadoop\'s sequence file format. However,currently the data is only in flat .txt format.Can anyo

Answer 1

Be watchful with format specifier :.

For example (note the space between % and s), System.out.printf("[% s]\t% s\t% s\n", writer.getLength(), key, value); will give us java.util.FormatFlagsConversionMismatchException: Conversion = s, Flags =

Instead, we should use:

System.out.printf("[%s]\t%s\t%s\n", writer.getLength(), key, value);