This is a very subtle bug. GiraphJob inherits from org.apache.mapreduce.Job. However, the methods submit() and waitForCompletion() are not overridden. I assumed that they were implemented, so when I called either one of these methods, the framework started up identity mappers/reducers. A simple fix is to throw unsupported operation exceptions or to implement these methods. Perhaps this has been done already?
-David On 2/7/12 7:46 PM, "David Garcia" <dgar...@potomacfusion.com> wrote: >I am running into a weird error that I haven't seen yet (I suppose I've >been lucky). I see the following in the logging: > >org.apache.hadoop.util.NativeCodeLoader: Unable to load native-hadoop >library for your platform... using builtin-java classes where applicable > > >In the job definition, the property "mapreduce.map.class" is not even >defined. For Giraph, this is usually set to >"mapreduce.map.class=org.apache.giraph.graph.GraphMapper" > >I'm building my project with hadoop 0.20.204. > >When I build the GiraphProject myself (and run my own tests with the >projects dependencies), I have no problems. The main difference is that >I'm using a Giraph dependency in my work project. All input is welcome. >Thx!! > >-David >
