Return-Path: X-Original-To: apmail-hadoop-general-archive@minotaur.apache.org Delivered-To: apmail-hadoop-general-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id D0D01950D for ; Fri, 7 Oct 2011 22:32:35 +0000 (UTC) Received: (qmail 53916 invoked by uid 500); 7 Oct 2011 22:32:34 -0000 Delivered-To: apmail-hadoop-general-archive@hadoop.apache.org Received: (qmail 53863 invoked by uid 500); 7 Oct 2011 22:32:34 -0000 Mailing-List: contact general-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: general@hadoop.apache.org Delivered-To: mailing list general@hadoop.apache.org Received: (qmail 53855 invoked by uid 99); 7 Oct 2011 22:32:34 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 07 Oct 2011 22:32:34 +0000 X-ASF-Spam-Status: No, hits=-2.3 required=5.0 tests=RCVD_IN_DNSWL_MED,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of Milind.Bhandarkar@emc.com designates 128.222.32.20 as permitted sender) Received: from [128.222.32.20] (HELO mexforward.lss.emc.com) (128.222.32.20) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 07 Oct 2011 22:32:30 +0000 Received: from hop04-l1d11-si04.isus.emc.com (HOP04-L1D11-SI04.isus.emc.com [10.254.111.24]) by mexforward.lss.emc.com (Switch-3.4.3/Switch-3.4.3) with ESMTP id p97MW8LE025176 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 7 Oct 2011 18:32:08 -0400 Received: from mailhub.lss.emc.com (mailhub.lss.emc.com [10.254.222.130]) by hop04-l1d11-si04.isus.emc.com (RSA Interceptor) for ; Fri, 7 Oct 2011 18:32:06 -0400 Received: from mxhub04.corp.emc.com (mxhub04.corp.emc.com [10.254.141.106]) by mailhub.lss.emc.com (Switch-3.4.3/Switch-3.4.3) with ESMTP id p97MW5xc029459 for ; Fri, 7 Oct 2011 18:32:05 -0400 Received: from mx21a.corp.emc.com ([169.254.1.122]) by mxhub04.corp.emc.com ([10.254.141.106]) with mapi; Fri, 7 Oct 2011 18:32:05 -0400 From: To: Date: Fri, 7 Oct 2011 18:33:33 -0400 Subject: Java Versions and Hadoop Thread-Topic: Java Versions and Hadoop Thread-Index: AcyFQPClM+ddYKgZSAasj7DtiGKILA== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.13.0.110805 acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-EMM-MHVC: 1 Hi Folks, While I have seen the wiki on which java versions to use currently to run Hadoop, I have not seen any discussion about the roadmap of java version compatibility with future hadoop versions. Recently, Oracle retired the "Operating System Distributor License for Java" (DLJ) [http://robilad.livejournal.com/90792.html, http://jdk-distros.java.net/] and Linux vendors have started making OpenJDK (6/7) as the default java version bundled with their OSs [http://www.java7developer.com/blog/?p=3D361]. Also, all future Java SE updates will be delivered through OpenJDK updates project. I see that OpenJDK6 (6b20pre) cannot be used to compile hadoop trunk. Has anyone tried OpenJDK7 ? Additionally, I have a few small projects in mind which can really make use of the new (esp I/O) features of Java 7. What, if any, timeline do hadoop developers have in mind to make Java 7 as required (and tested with OpenJDK 7) ? Thanks, - milind --- Milind Bhandarkar Greenplum Labs, EMC (Disclaimer: Opinions expressed in this email are those of the author, and do not necessarily represent the views of any organization, past or present, the author might be affiliated with.)