Trivial Description
ClusterDumper utility never calls flush on the OutputStreamWriter. As of issue https://issues.apache.org/jira/browse/MAHOUT-679, the output stream is never being closed when it defaults to System.out – while that's a good thing, it would be nice to flush the stream before exiting the program. As is, when I run cluster dumper with the -b (substring) option set to something like 50, the stream never gets big enough to overflow the default buffer on my machine, so I see no output. Even when it does get big enough to overflow the buffer, I still miss the last cluster's summary. When the output is written to a file, the close() method usually flushes the buffer by default, but it shouldn't hurt to call the flush method either way – therefore I'd suggest adding in an unconditional call to writer.flush(); in the finally block just before conditionally closing the writer. (line 199 in the org.apache.mahout.utils.clustering.ClusterDumper.run(String[] args) method)
} finally {
writer.flush();
if (shouldClose)
}
