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From Xiaoye Sun <>
Subject large scheduler delay in OnlineLDAOptimizer, (MLlib and LDA)
Date Thu, 27 Oct 2016 18:05:27 GMT

I am running some experiments with OnlineLDAOptimizer in Spark 1.6.1. My
Spark cluster has 30 machines.

However, I found that the Scheduler delay at job/stage "reduce at
LDAOptimizer.scala:452" is extremely large when the LDA model is large. The
delay could be tens of seconds.

Does anyone know the reason for that?


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