Return-Path: Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: (qmail 52716 invoked from network); 29 Oct 2009 17:42:47 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 29 Oct 2009 17:42:47 -0000 Received: (qmail 1595 invoked by uid 500); 29 Oct 2009 17:42:47 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 1480 invoked by uid 500); 29 Oct 2009 17:42:46 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-issues@hadoop.apache.org Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 1304 invoked by uid 99); 29 Oct 2009 17:42:46 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 29 Oct 2009 17:42:46 +0000 X-ASF-Spam-Status: No, hits=-10.5 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 29 Oct 2009 17:42:43 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 4A040234C4D7 for ; Thu, 29 Oct 2009 10:42:00 -0700 (PDT) Message-ID: <498529208.1256838120302.JavaMail.jira@brutus> Date: Thu, 29 Oct 2009 17:42:00 +0000 (UTC) From: "Hudson (JIRA)" To: mapreduce-issues@hadoop.apache.org Subject: [jira] Commented: (MAPREDUCE-1089) Fair Scheduler preemption triggers NPE when tasks are scheduled but not running In-Reply-To: <1331980192.1255136191740.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/MAPREDUCE-1089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12771507#action_12771507 ] Hudson commented on MAPREDUCE-1089: ----------------------------------- Integrated in Hadoop-Mapreduce-trunk #127 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Mapreduce-trunk/127/]) . Fix NPE in fair scheduler preemption when tasks are scheduled but not running. Contributed by Todd Lipcon. > Fair Scheduler preemption triggers NPE when tasks are scheduled but not running > ------------------------------------------------------------------------------- > > Key: MAPREDUCE-1089 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1089 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: contrib/fair-share > Affects Versions: 0.21.0 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Fix For: 0.21.0 > > Attachments: mapreduce-1089.txt > > > We see exceptions like this when preemption runs when a task has been scheduled on a TT but has not yet started running. > 2009-10-09 14:30:53,989 INFO org.apache.hadoop.mapred.FairScheduler: Should preempt 2 MAP tasks for job_200910091420_0006: tasksDueToMinShare = 2, tasksDueToFairShare = 0 > 2009-10-09 14:30:54,036 ERROR org.apache.hadoop.mapred.FairScheduler: Exception in fair scheduler UpdateThread > java.lang.NullPointerException > at org.apache.hadoop.mapred.FairScheduler$2.compare(FairScheduler.java:1015) > at org.apache.hadoop.mapred.FairScheduler$2.compare(FairScheduler.java:1013) > at java.util.Arrays.mergeSort(Arrays.java:1270) > at java.util.Arrays.sort(Arrays.java:1210) > at java.util.Collections.sort(Collections.java:159) > at org.apache.hadoop.mapred.FairScheduler.preemptTasks(FairScheduler.java:1013) > at org.apache.hadoop.mapred.FairScheduler.preemptTasksIfNecessary(FairScheduler.java:911) > at org.apache.hadoop.mapred.FairScheduler$UpdateThread.run(FairScheduler.java:286) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.