Update:
The NullPointerException being thrown was an error on my part: I had
accidentally deleted the table I was using minutes prior. But
exceptions were still being thrown after I fixed that. Eventually, I
found this in the logs:
FATAL org.apache.giraph.graph.GraphMapper: uncaughtException:
I'm not sure anyone has been running Giraph via the giraph scripts with
Hbase input, maybe its messed up. I think those messages are from a time
when you could unpack the tar.gz build product in target/ somewhere else
and run from that instead of passing the fat jar to hadoop jar command
yourself.
