Return-Path: X-Original-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-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 135871156F for ; Thu, 3 Jul 2014 05:37:43 +0000 (UTC) Received: (qmail 88835 invoked by uid 500); 3 Jul 2014 05:37:38 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 88652 invoked by uid 500); 3 Jul 2014 05:37:38 -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 88635 invoked by uid 99); 3 Jul 2014 05:37:38 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 03 Jul 2014 05:37:38 +0000 X-ASF-Spam-Status: No, hits=0.7 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [79.99.40.135] (HELO auth-smtp-02.streamline.net) (79.99.40.135) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 03 Jul 2014 05:37:32 +0000 Received: by auth-smtp-02.streamline.net (Postfix, from userid 500) id 4C3E617B81D3; Thu, 3 Jul 2014 06:37:10 +0100 (BST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on auth-smtp-02.streamline.net Received: from [192.168.0.4] (unknown [176.252.131.203]) (Authenticated sender: studio@chrismackenziephotography.co.uk) by auth-smtp-02.streamline.net (Postfix) with ESMTP id 882CF17B81CF for ; Thu, 3 Jul 2014 06:37:04 +0100 (BST) User-Agent: Microsoft-MacOutlook/14.4.3.140616 Date: Thu, 03 Jul 2014 06:37:00 +0100 Subject: What is the correct way to get a string back from a mapper or reducer From: Chris MacKenzie To: "user@hadoop.apache.org" Message-ID: Thread-Topic: What is the correct way to get a string back from a mapper or reducer Mime-version: 1.0 Content-type: text/plain; charset="ISO-8859-1" Content-transfer-encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org Hi, I have the following code and am using hadoop 2.4: In my driver: Configuration conf =3D new Configuration(); conf.set("sub", "help"); =8A.. String s =3D conf.get("sub=B2); In my reducer: Configuration conf =3D context.getConfiguration(); conf.set("sub", "Test=B2); When I test the value in the driver, it isn=B9t updated following the reduce Best, Chris MacKenzie Expert>