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https://issues.apache.org/jira/browse/MAHOUT-1575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14021002#comment-14021002
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Hudson commented on MAHOUT-1575:
--------------------------------
FAILURE: Integrated in Mahout-Quality #2640 (See
[https://builds.apache.org/job/Mahout-Quality/2640/])
MAHOUT-1575 - Allow 2 extra passes for conjugate gradient (tdunning: rev
99fd9ba4f9673b2b2d30c2b403aaa294503cc2a2)
*
mrlegacy/src/main/java/org/apache/mahout/math/hadoop/solver/DistributedConjugateGradientSolver.java
* math/src/main/java/org/apache/mahout/math/solver/ConjugateGradientSolver.java
> Conjugate gradient assumes best case scenario for convergence
> -------------------------------------------------------------
>
> Key: MAHOUT-1575
> URL: https://issues.apache.org/jira/browse/MAHOUT-1575
> Project: Mahout
> Issue Type: Bug
> Reporter: Ted Dunning
>
> The conjugate gradient solve that we have assumes that it will converge
> within the theoretical n steps where n is the size of the input. In fact,
> convergence may not happen within exactly that number of steps due to
> numerical issues so we should allow for a few extra iterations.
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