BoLing created SPARK-20805:
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Summary: updated updateP in SVD++ is error
Key: SPARK-20805
URL: https://issues.apache.org/jira/browse/SPARK-20805
Project: Spark
Issue Type: Bug
Components: GraphX
Affects Versions: 2.1.1, 1.6.1
Reporter: BoLing
In algorithm svd++, we all known that the usr._2 store the value of pu +
|N(u)|^(-0.5)*sum(y); the function sendMsgTrainF compute the updated value of
updateP,updateQ and updateY. At the beginning,the cycle iteration update the
part of y in usr._2, but pu is never updated. so we should fix the
sendMessageToSrcFunction in sendMsgTrainF. the old code is
ctx.sendToSrc((updateP, updateY, (err - conf.gamma6 * usr._3) * conf.gamma1)).
if we fix like that ctx.sendToSrc((updateP, updateP, (err - conf.gamma6 *
usr._3) * conf.gamma1)), it maybe arrive the effect we want.
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