Hi Giraph community, I think I followed all of the directions (for a Giraph on a psuedo-cluster), and it looks like
> mvn clean test -Dprop.mapred.job.tracker=localhost:9001 runs fine. However, I'm new to the Hadoop infrastructure, and have a couple of questions about getting started with Giraph. 1) > hadoop jar target/giraph-0.2-SNAPSHOT-jar-with-dependencies.jar > org.apache.giraph.benchmark.PageRankBenchmark -e 1 -s 3 -v -V 50 -w 3 gives me the error "java.lang.NullPointerException at at org.apache.giraph.benchmark.PageRankBenchmark.run(PageRankBenchmark.java:127)" It looks like some error with configuration? 2) How should I / do I enable the log4j? An appender that writes to the HDFS? How else could I grep all my logs for errors and things? 3) With regard to Giraph and maven, none of the directions suggested doing "local overrides." Therefore, why should I expect my Giraph installation to refer to libraries and configuration in "~/Applications/hadoop or zookeeper" rather than those in "~.m2/repo?" 4) Why doesn't running maven for Giraph install hadoop along the way (or does it)? I'd appreciate if you'd help improve my understanding! Thanks! -Jeff
