Return-Path: Delivered-To: apmail-hadoop-mapreduce-user-archive@minotaur.apache.org Received: (qmail 23289 invoked from network); 17 Apr 2011 10:59:14 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 17 Apr 2011 10:59:14 -0000 Received: (qmail 22403 invoked by uid 500); 17 Apr 2011 10:59:14 -0000 Delivered-To: apmail-hadoop-mapreduce-user-archive@hadoop.apache.org Received: (qmail 22359 invoked by uid 500); 17 Apr 2011 10:59:14 -0000 Mailing-List: contact mapreduce-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-user@hadoop.apache.org Delivered-To: mailing list mapreduce-user@hadoop.apache.org Received: (qmail 22351 invoked by uid 99); 17 Apr 2011 10:59:13 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 17 Apr 2011 10:59:13 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of harsh@cloudera.com designates 209.85.216.176 as permitted sender) Received: from [209.85.216.176] (HELO mail-qy0-f176.google.com) (209.85.216.176) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 17 Apr 2011 10:59:07 +0000 Received: by qyk30 with SMTP id 30so3058441qyk.14 for ; Sun, 17 Apr 2011 03:58:46 -0700 (PDT) Received: by 10.224.64.209 with SMTP id f17mr1978507qai.288.1303037925103; Sun, 17 Apr 2011 03:58:45 -0700 (PDT) MIME-Version: 1.0 Received: by 10.224.89.84 with HTTP; Sun, 17 Apr 2011 03:58:25 -0700 (PDT) In-Reply-To: References: From: Harsh J Date: Sun, 17 Apr 2011 16:28:25 +0530 Message-ID: Subject: Re: Observation of MapReduce Task execution To: mapreduce-user@hadoop.apache.org Content-Type: text/plain; charset=ISO-8859-1 Hello, On Sun, Apr 17, 2011 at 3:48 PM, Francesco De Luca wrote: > > Exists any notification mechanism to be notified of all task state changes > (task failure,task completion ecc)? > > In particular i need to follow all the map and reduce task execution. You can loop over and request the TaskCompletionEvents from your RunningJob instance: http://hadoop.apache.org/common/docs/r0.20.2/api/org/apache/hadoop/mapred/RunningJob.html#getTaskCompletionEvents(int) -- Harsh J