Return-Path: X-Original-To: apmail-hadoop-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 218D111D7B for ; Tue, 3 Jun 2014 12:12:39 +0000 (UTC) Received: (qmail 28953 invoked by uid 500); 3 Jun 2014 12:04:35 -0000 Delivered-To: apmail-hadoop-user-archive@hadoop.apache.org Received: (qmail 28839 invoked by uid 500); 3 Jun 2014 12:04:35 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 28832 invoked by uid 99); 3 Jun 2014 12:04:35 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 03 Jun 2014 12:04:35 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of msegel_hadoop@hotmail.com designates 65.55.111.91 as permitted sender) Received: from [65.55.111.91] (HELO BLU004-OMC2S16.hotmail.com) (65.55.111.91) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 03 Jun 2014 12:04:30 +0000 Received: from BLU436-SMTP10 ([65.55.111.72]) by BLU004-OMC2S16.hotmail.com with Microsoft SMTPSVC(7.5.7601.22701); Tue, 3 Jun 2014 05:04:06 -0700 X-TMN: [wR59HY37F5Tu/hZCQSYn2v8ATKE9gvaD] X-Originating-Email: [msegel_hadoop@hotmail.com] Message-ID: Received: from 173-15-87-33-illinois.hfc.comcastbusiness.net ([173.15.87.33]) by BLU436-SMTP10.smtp.hotmail.com over TLS secured channel with Microsoft SMTPSVC(8.0.9200.16384); Tue, 3 Jun 2014 05:04:06 -0700 From: Michael Segel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Subject: How can a task know if its running as a MR1 or MR2 job? Date: Tue, 3 Jun 2014 07:04:05 -0500 To: user@hadoop.apache.org MIME-Version: 1.0 (Mac OS X Mail 7.3 \(1878.2\)) X-Mailer: Apple Mail (2.1878.2) X-OriginalArrivalTime: 03 Jun 2014 12:04:06.0144 (UTC) FILETIME=[EB11F800:01CF7F23] X-Virus-Checked: Checked by ClamAV on apache.org Just a quick question...=20 Suppose you have a M/R job running.=20 How does the Mapper or Reducer task know or find out if its running as a = M/R 1 or M/R 2 job?=20 I would suspect the job context would hold that information... but on = first glance I didn't see it.=20 So what am I missing?=20 Thx -Mike