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From Maria Stylianou <>
Subject InputFormat for the example SimpleMasterComputeVertex
Date Wed, 13 Feb 2013 11:04:06 GMT

I am trying to run the example SimpleMasterComputeVertex, but no matter
which Input Format and graph I give, it doesn't work. Each worker gives the

Caused by: java.lang.*NullPointerException*
	at org.apache.giraph.examples.*SimpleMasterComputeVertex.compute*(*42*)

This line 42 is the first line of the compute()
public void compute(Iterable<DoubleWritable> messages){

So I guess, the initialization is not done correctly, because the input
file does not have the correct format.

Any help would be appreciated,
Maria Stylianou
Intern at Telefonica, Barcelona, Spain
Master Student of European Master in Distributed
Universitat Polit├Ęcnica de Catalunya - BarcelonaTech, Barcelona, Spain
KTH Royal Institute of Technology, Stockholm, Sweden

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