GitHub user AnthonyTruchet opened a pull request: https://github.com/apache/spark/pull/15905
[SPARK-18471][MLLIB] In LBFGS, avoid sending huge vectors of 0 ## What changes were proposed in this pull request? CostFun used to send a dense vector of zeroes as a closure in a treeAggregate call. To avoid that, we replace treeAggregate by mapPartition + treeReduce, creating a zero vector inside the mapPartition block in-place. ## How was this patch tested? Tests run by hand locally. (Setting up local infra to run the official Spark tests is in progress) You can merge this pull request into a Git repository by running: $ git pull https://github.com/AnthonyTruchet/spark ENG-17719-lbfgs-only Alternatively you can review and apply these changes as the patch at: https://github.com/apache/spark/pull/15905.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #15905 ---- commit e0a88bd716feae54f5ff0c235c7bb566fefcc7bd Author: Eugene Kharitonov <e.kharito...@criteo.com> Date: 2016-10-14T11:25:34Z [SPARK-18471][MLLIB] In LBFGS, avoid sending huge vectors of 0 CostFun used to send a dense vector of zeroes as a closure in a treeAggregate call. To avoid that, we replace treeAggregate by mapPartition + treeReduce, creating a zero vector inside the mapPartition block in-place. ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org