FileTailingAdaptor is great to tail log files and send them to Hadoop.
However, last line of the chunk is usually cut which leads to some errors.
CharFileTailingAdaptorUTF8 can solve such problem.
Nonetheless, this adaptor calls the MapProcessor.process() method for every
line in each chunk, thus slowing a lot the Demux phase.
FileTailingAdaptorPreserveLines adaptor mixes the benefits of the two
adaptors: the (Demux) speed of FileTailingAdaptor and
the preservation of lines from CharFileTailingAdaptorUTF8.