Return-Path: Delivered-To: apmail-hadoop-mapreduce-dev-archive@minotaur.apache.org Received: (qmail 92956 invoked from network); 23 Aug 2010 16:03:23 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 23 Aug 2010 16:03:23 -0000 Received: (qmail 81767 invoked by uid 500); 23 Aug 2010 16:03:23 -0000 Delivered-To: apmail-hadoop-mapreduce-dev-archive@hadoop.apache.org Received: (qmail 81633 invoked by uid 500); 23 Aug 2010 16:03:22 -0000 Mailing-List: contact mapreduce-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-dev@hadoop.apache.org Delivered-To: mailing list mapreduce-dev@hadoop.apache.org Received: (qmail 81625 invoked by uid 99); 23 Aug 2010 16:03:22 -0000 Received: from Unknown (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 23 Aug 2010 16:03:22 +0000 X-ASF-Spam-Status: No, hits=2.2 required=10.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of yuzhihong@gmail.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; Mon, 23 Aug 2010 16:02:59 +0000 Received: by qyk2 with SMTP id 2so6319688qyk.14 for ; Mon, 23 Aug 2010 09:02:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=5wEkiDf4XmIFnW13DS2PZGSN+2GfeOdBhiFUhRAOexQ=; b=OP4XrjqFSCh5vlOxHh1ceFcbqlIMydEzhCo5OAQXVywAMtHHK+WDtePgdj7Xrnxbk3 AURBBqiwW49JNSAlSiQGl633XCS6u//iUFW7iJB6l3ujm6xXKcz9W1aXAuJ3qgiKbY8f FAOxdRwoopTDAIZSuZjQ9bqvUFUcD21duwmp0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=F1SiwUP1Xd0Sm1P88FYpdnQVYZYxsiVHxBKJ5QNaJQ8JEUhUFrBCS891cWOKmtNXlk Pp8OEg6s1GsUi9zuv/C75VFQF/JLaJ6D8oaYq65S5GOVUdJtCy777MxXOWVECSUHDDrD Sj9xSAHhsOLIg/r1T4Aq1su/1nJuWJzzgLS7s= MIME-Version: 1.0 Received: by 10.224.29.4 with SMTP id o4mr3492815qac.203.1282579358663; Mon, 23 Aug 2010 09:02:38 -0700 (PDT) Received: by 10.229.48.129 with HTTP; Mon, 23 Aug 2010 09:02:38 -0700 (PDT) Date: Mon, 23 Aug 2010 09:02:38 -0700 Message-ID: Subject: Obtaining active TaskTrackers From: Ted Yu To: mapreduce-dev@hadoop.apache.org Content-Type: multipart/alternative; boundary=0015175cafaa11c3e6048e7fc74c X-Virus-Checked: Checked by ClamAV on apache.org --0015175cafaa11c3e6048e7fc74c Content-Type: text/plain; charset=ISO-8859-1 Hi, How can I obtain the list of active TaskTrackers programmatically ? I looked at machines.jsp which uses a reference to JobTracker How do I obtain JobTracker reference from client ? Thanks --0015175cafaa11c3e6048e7fc74c--