Looks like an hbase issue Holger. 'java.lang.IllegalArgumentException: java.net.URISyntaxException: Illegal character in scheme name at index 7: hregion_triples,http://dblp.l3s.de/d2r/resource/publications/conf/dac/ObermeierK88,5315976128113435400 '
Hbase is writing a file to HDFS named 'hregion_triples....'. Filenames are treated as URIs in HDFS -- as you've learned (painfully) -- but the filename is not legal; it has a '_' in the scheme name. Either encode your row names or your update your hbase to TRUNK so you get the fix for this issue (HADOOP-2056). Good luck Holger, St.Ack