Thank you too, Jaeho! I tried your suggestion, but I got:
12/10/01 10:29:30 WARN graph.GiraphTypeValidator: Input format vertex index type is not known 12/10/01 10:29:30 WARN graph.GiraphTypeValidator: Input format vertex value type is not known 12/10/01 10:29:30 WARN graph.GiraphTypeValidator: Input format edge value type is not known 12/10/01 10:29:30 WARN graph.GiraphTypeValidator: Output format vertex index type is not known 12/10/01 10:29:30 WARN graph.GiraphTypeValidator: Output format vertex value type is not known 12/10/01 10:29:30 WARN graph.GiraphTypeValidator: Output format edge value type is not known 12/10/01 10:29:32 INFO mapred.JobClient: Running job: job_201210011022_0001 12/10/01 10:29:33 INFO mapred.JobClient: map 0% reduce 0% 12/10/01 10:30:44 INFO mapred.JobClient: map 25% reduce 0% 12/10/01 10:35:52 INFO mapred.JobClient: Job complete: job_201210011022_0001 12/10/01 10:35:52 INFO mapred.JobClient: Counters: 5 12/10/01 10:35:52 INFO mapred.JobClient: Job Counters 12/10/01 10:35:52 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=684226 12/10/01 10:35:52 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0 12/10/01 10:35:52 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0 12/10/01 10:35:52 INFO mapred.JobClient: Launched map tasks=2 12/10/01 10:35:52 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=7050 hadoop fs -ls shortestPathsOutputGraph Found 1 items drwxr-xr-x - ro supergroup 0 2012-10-01 10:29 /user/ro/shortestPathsOutputGraph/_logs It looks like that the output is still incomplete =/ Besides that, there's something wrong because of these warnings.
