giraph

I ran Giraph 1.0.0 with hadoop 2.2.0 using the PageRank Benchmark example here . Suddenly I got this error result: Exception in thread "main" java.lang.IllegalArgumentException: checkLocalJobRunnerConfiguration: When using LocalJobRunner, must have only one worker since only 1 task at a time! at org.apache.giraph.job.GiraphJob.checkLocalJobRunnerConfiguration(GiraphJob.java:151) at org.apache.giraph.job.GiraphJob.run(GiraphJob.java:225) at org.apache.giraph.benchmark.GiraphBenchmark.run(GiraphBenchmark.java:90) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70) at org.apache.hadoop

I need some help to be confirm my choice... and to learn if you can give me some information. My storage database is TitanDb with Cassandra. I have a very large graph. My goal is to use Mllib on the graph latter. My first idea : use Titan with GraphX but I did not found anything or in development in progress... TinkerPop is not ready yet. So I have a look to Giraph. TinkerPop, Titan can communique with Rexster from TinkerPop. My question is : What are the benefit to use Giraph ? Gremlin seems to do the same think and is distributed. Thank you very much to explain me. I think I don't really