Return-Path: X-Original-To: apmail-mahout-user-archive@www.apache.org Delivered-To: apmail-mahout-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 863D610F33 for ; Thu, 24 Oct 2013 03:04:23 +0000 (UTC) Received: (qmail 26000 invoked by uid 500); 24 Oct 2013 03:04:19 -0000 Delivered-To: apmail-mahout-user-archive@mahout.apache.org Received: (qmail 25954 invoked by uid 500); 24 Oct 2013 03:04:18 -0000 Mailing-List: contact user-help@mahout.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@mahout.apache.org Delivered-To: mailing list user@mahout.apache.org Received: (qmail 25909 invoked by uid 99); 24 Oct 2013 03:04:17 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 24 Oct 2013 03:04:17 +0000 X-ASF-Spam-Status: No, hits=1.7 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of barnold4238@gmail.com designates 209.85.128.178 as permitted sender) Received: from [209.85.128.178] (HELO mail-ve0-f178.google.com) (209.85.128.178) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 24 Oct 2013 03:04:12 +0000 Received: by mail-ve0-f178.google.com with SMTP id jy13so1134692veb.23 for ; Wed, 23 Oct 2013 20:03:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=BeP9/a9gKzhjUlxt5vflp1OvenmRwmx3Iz20k4SriTI=; b=aBvOCbKd/W7w0ESMyILRHiNWqi/ku3s/GFWPE2HvE4EGMMbtP/YWm/y4g+Ytz+2Hu4 p1E5LgCMxBrbgfqN72afODdLfLwKjWVL3wBmx1omVHr8fxtv6J4jFzQ480o6WaQUv6nX Eqpwh2Bwx2bz6Z5SVEeYVM/LdXZnOb5vplXHfKpFhJeGFJ9775aexyzMdqQUR5XA+FsN gfIuG1RCqWhpvJxagWj06JRAV/j+E6olliVZpgvILv5psMlPAymKzPJ0mgDMiF5KNst7 nNsoM92W3HxrcxhbN1FFmogC8jH7EgmgOoo0N6RBvu+71VoB3/IeQQFamXfMWmf/lBOv HUAQ== MIME-Version: 1.0 X-Received: by 10.220.97.145 with SMTP id l17mr192833vcn.35.1382583831741; Wed, 23 Oct 2013 20:03:51 -0700 (PDT) Received: by 10.220.223.9 with HTTP; Wed, 23 Oct 2013 20:03:51 -0700 (PDT) Date: Wed, 23 Oct 2013 22:03:51 -0500 Message-ID: Subject: Issue with ParallelALSFactorizationJob From: Brian Arnold To: user@mahout.apache.org Content-Type: multipart/alternative; boundary=001a11c1dd0229cbc904e973e28c X-Virus-Checked: Checked by ClamAV on apache.org --001a11c1dd0229cbc904e973e28c Content-Type: text/plain; charset=ISO-8859-1 Hey Everyone, I was just trying to run the ParallelALSFactorizedJob on my Hadoop cluster and my job failed severals jobs in with the following error below. The name of the failed job was (Recompute U, iteration (2/10), (1 threads, 20 features, implicit feedback)). Does anyone have any idea of what may be causing this? Here is a few lines from my input file as well: 120625006,896538,12.0 121573206,896538,20.0 121587646,896538,14.0 2013-10-23 21:21:10,806 WARN org.apache.hadoop.mapred.Child: Error running child java.lang.RuntimeException: java.lang.NullPointerException at org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper.run(MultithreadedMapper.java:149) at org.apache.mahout.cf.taste.hadoop.als.MultithreadedSharingMapper.run(MultithreadedSharingMapper.java:53) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:363) at org.apache.hadoop.mapred.Child$4.run(Child.java:255) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:396) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232) at org.apache.hadoop.mapred.Child.main(Child.java:249) Caused by: java.lang.NullPointerException at org.apache.mahout.math.als.ImplicitFeedbackAlternatingLeastSquaresSolver.getYtransponseCuMinusIYPlusLambdaI(ImplicitFeedbackAlternatingLeastSquaresSolver.java:95) at org.apache.mahout.math.als.ImplicitFeedbackAlternatingLeastSquaresSolver.solve(ImplicitFeedbackAlternatingLeastSquaresSolver.java:51) at org.apache.mahout.cf.taste.hadoop.als.SolveImplicitFeedbackMapper.map(SolveImplicitFeedbackMapper.java:54) at org.apache.mahout.cf.taste.hadoop.als.SolveImplicitFeedbackMapper.map(SolveImplicitFeedbackMapper.java:29) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145) at org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper$MapRunner.run(MultithreadedMapper.java:268) --001a11c1dd0229cbc904e973e28c--