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Posted to dev@mahout.apache.org by "Pat Ferrel (JIRA)" <ji...@apache.org> on 2015/05/13 19:25:00 UTC
[jira] [Updated] (MAHOUT-1707) Spark-itemsimilarity uses too much
memory
[ https://issues.apache.org/jira/browse/MAHOUT-1707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pat Ferrel updated MAHOUT-1707:
-------------------------------
Description:
java.lang.OutOfMemoryError: Java heap space
The code has an unnecessary .collect(), forcing all interaction data into memory of the client/driver. Increasing the executor memory will not help with this.
remove this line and rebuild Mahout.
https://github.com/apache/mahout/blob/mahout-0.10.x/spark/src/main/scala/org/apache/mahout/drivers/TextDelimitedReaderWriter.scala#L157
The errant line reads:
interactions.collect()
This forces the user action data into memory, a bad thing for memory consumption. Removing it should allow for better Spark memory management.
was:
java.lang.OutOfMemoryError: Java heap space
The code has an unnecessary .collect(), forcing all interaction data into memory of the client/driver. Increasing the executor memory will not help with this.
remove this line and rebuild Mahout.
https://github.com/apache/mahout/blob/mahout-0.10.x/spark/src/main/scala/org/apache/mahout/drivers/TextDelimitedReaderWriter.scala#L157
The errant line reads:
interactions.collect()
This forces the user action data into memory, a bad thing for memory consumption.
> Spark-itemsimilarity uses too much memory
> -----------------------------------------
>
> Key: MAHOUT-1707
> URL: https://issues.apache.org/jira/browse/MAHOUT-1707
> Project: Mahout
> Issue Type: Bug
> Components: Collaborative Filtering, cooccurrence
> Affects Versions: 0.10.0
> Environment: Spark
> Reporter: Pat Ferrel
> Assignee: Pat Ferrel
> Fix For: 0.10.1
>
>
> java.lang.OutOfMemoryError: Java heap space
> The code has an unnecessary .collect(), forcing all interaction data into memory of the client/driver. Increasing the executor memory will not help with this.
> remove this line and rebuild Mahout.
> https://github.com/apache/mahout/blob/mahout-0.10.x/spark/src/main/scala/org/apache/mahout/drivers/TextDelimitedReaderWriter.scala#L157
> The errant line reads:
> interactions.collect()
> This forces the user action data into memory, a bad thing for memory consumption. Removing it should allow for better Spark memory management.
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