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?
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
>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.