I am trying to convert a JavaRDD<PageRankCase> class to a DataFrame so that I can later save it into a parquet file but the code execution stops at the createDataFrame function call, it gives null when I handle the exception. Here's my class.
public static class PageRanksCase implements Serializable{
private String node;
private Double importance;
public void setNode(String node) { this.node = node; }
public void setImportance(Double importance) { this.importance = importance; }
public String getNode(String node) { return this.node; }
public Double getImportance(String node) { return this.importance; }
}
And this the code I am trying to run to convert the class into DataFrame.
try{
JavaRDD<PageRanksCase> finalData = GetTopNNodes(pairedrdd);
System.out.println("coming here");
DataFrame finalFrame = Service.sqlCtx().createDataFrame(finalData,PageRanksCase.class);
System.out.println("coming here too");
finalFrame.write().parquet(rdfanalyzer.spark.Configuration.storage() + "sib200PageRank.parquet");
}
catch(Exception e)
{
System.out.println(e.getMessage()); // gives null here.
}
It does print coming here but it's not printing coming here too and also not giving any errors. Here's how I convert my JavaPairRDD to JavaRDD.
public static JavaRDD<PageRanksCase> GetTopNNodes(JavaPairRDD<String,Double> pairedrdd){
return pairedrdd.map(new Function<Tuple2<String,Double>, PageRanksCase>() {
@Override
public PageRanksCase call(Tuple2<String, Double> line) throws Exception {
PageRanksCase pgrank = new PageRanksCase();
pgrank.setImportance(line._2);
pgrank.setNode(line._1());
return pgrank;
}
});
}
Anybody has any idea whats going on here ?
