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https://issues.apache.org/jira/browse/MAHOUT-477?focusedWorklogId=987035&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-987035
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ASF GitHub Bot logged work on MAHOUT-477:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Oct/25 20:02
Start Date: 13/Oct/25 20:02
Worklog Time Spent: 10m
Work Description: rawkintrevo commented on PR #584:
URL: https://github.com/apache/mahout/pull/584#issuecomment-3398894367
NICE add @guan404ming !
Issue Time Tracking
-------------------
Worklog Id: (was: 987035)
Time Spent: 20m (was: 10m)
> SimilarityMatrixEntryKeyPartitioner sometimes produces illegal partition
> numbers
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-477
> URL: https://issues.apache.org/jira/browse/MAHOUT-477
> Project: Mahout
> Issue Type: Bug
> Reporter: Sebastian Schelter
> Assignee: Sean R. Owen
> Priority: Minor
> Fix For: 0.4
>
> Attachments: MAHOUT-477.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> My job failed on EMR today with the exception below. I think this happens
> only when when there are negative row/column indices in a matrix given to
> RowSimilarityJob, still have to figure out the details.
> java.io.IOException: Illegal partition for
> org.apache.mahout.math.hadoop.similarity.SimilarityMatrixEntryKey@3532b21 (-3)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:921)
> at
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:549)
> at
> org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80)
> at org.apache.hadoop.mapreduce.Mapper.map(Mapper.java:124)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:629)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:310)
> at org.apache.hadoop.mapred.Child.main(Child.java:170)
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