Gianmarco De Francisci Morales created GIRAPH-591:
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Summary: Compute called before initialize in
ComputeCallable.computePartition?
Key: GIRAPH-591
URL: https://issues.apache.org/jira/browse/GIRAPH-591
Project: Giraph
Issue Type: Bug
Reporter: Gianmarco De Francisci Morales
Hi,
I get the following exception when I try to run my vertex
{code}
java.lang.NullPointerException at
org.apache.giraph.examples.RandomWalkVertex.getDanglingProbability(RandomWalkVertex.java:90)
at
org.apache.giraph.examples.RandomWalkWithRestartVertex.recompute(RandomWalkWithRestartVertex.java:72)
at
org.apache.giraph.examples.RandomWalkVertex.compute(RandomWalkVertex.java:100)
at
org.apache.giraph.graph.ComputeCallable.computePartition(ComputeCallable.java:222)
at org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:156) at
org.apache.giraph.graph.ComputeCallable.call(ComputeCallable.java:69) at
java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at
java.util.concurrent.FutureTask.run(FutureTask.java:166) at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
{code}
The code is the following:
{code}
protected double getDanglingProbability() {
return this.<DoubleWritable>getAggregatedValue(
RandomWalkVertex.CUMULATIVE_DANGLING_PROBABILITY).get();
}
{code}
>From which I infer that the aggregator has not been initialized. However, the
>initialize method is as follows:
{code}
public void initialize() throws InstantiationException,
IllegalAccessException {
registerAggregator(RandomWalkVertex.CUMULATIVE_DANGLING_PROBABILITY,
DoubleSumAggregator.class);
registerAggregator(RandomWalkVertex.L1_NORM_OF_PROBABILITY_DIFFERENCE,
DoubleSumAggregator.class);
}
{code}
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