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https://issues.apache.org/jira/browse/SPARK-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Burak Yavuz updated SPARK-2916:
-------------------------------

    Description: 
While running any of the regression algorithms with gradient descent, the 
treeAggregate blows up after several iterations.

Observed on EC2 cluster with 16 nodes, matrix dimensions of 1,000,000 x 5,000

In order to replicate the problem, use aggregate multiple times, maybe over 
50-60 times.

  was:
While running any of the regression algorithms with gradient descent, the 
treeAggregate blows up after several iterations.

Observed on EC2 cluster with 16 nodes, matrix dimensions of 1,000,000 x 5,000


> [MLlib] While running regression tests with dense vectors of length greater 
> than 1000, the treeAggregate blows up after several iterations
> ------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-2916
>                 URL: https://issues.apache.org/jira/browse/SPARK-2916
>             Project: Spark
>          Issue Type: Bug
>          Components: MLlib
>            Reporter: Burak Yavuz
>            Priority: Blocker
>
> While running any of the regression algorithms with gradient descent, the 
> treeAggregate blows up after several iterations.
> Observed on EC2 cluster with 16 nodes, matrix dimensions of 1,000,000 x 5,000
> In order to replicate the problem, use aggregate multiple times, maybe over 
> 50-60 times.



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