Github user akopich commented on the pull request: https://github.com/apache/spark/pull/1269#issuecomment-58220390 Unfortunately, our cluster is unavailable due to some technical issues. Probably, the problem you report is related to the fact that `backgound : Array[Float]` in the line ``` val newParameters = parameters.map(parameter => parameter.getNewTheta(topicsBC, background, eps, gamma)).cache() ``` is serialized with the task. But it's clear that `backgound` variable should be approximately 0.5 MB, and I still have no idea why does the task grow up to several MB. I don't understand why it grows neither.
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