Return-Path: X-Original-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 7AFB31077C for ; Thu, 12 Feb 2015 19:13:12 +0000 (UTC) Received: (qmail 46085 invoked by uid 500); 12 Feb 2015 19:13:12 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 46007 invoked by uid 500); 12 Feb 2015 19:13:12 -0000 Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-issues@hadoop.apache.org Delivered-To: mailing list hdfs-issues@hadoop.apache.org Received: (qmail 45795 invoked by uid 99); 12 Feb 2015 19:13:12 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 12 Feb 2015 19:13:12 +0000 Date: Thu, 12 Feb 2015 19:13:12 +0000 (UTC) From: "Colin Patrick McCabe (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HDFS-7790) Do not create optional fields in DFSInputStream unless they are needed MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HDFS-7790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Colin Patrick McCabe updated HDFS-7790: --------------------------------------- Status: Patch Available (was: Open) > Do not create optional fields in DFSInputStream unless they are needed > ---------------------------------------------------------------------- > > Key: HDFS-7790 > URL: https://issues.apache.org/jira/browse/HDFS-7790 > Project: Hadoop HDFS > Issue Type: Improvement > Components: dfsclient > Affects Versions: 2.3.0 > Reporter: Colin Patrick McCabe > Assignee: Colin Patrick McCabe > Attachments: HDFS-7790.001.patch > > > {{DFSInputStream#oneByteBuffer}} and {{DFSInputStream#extendedReadBuffers}} are only used some of the time, and they are always used under the positional lock. Let's create them on demand to save memory. -- This message was sent by Atlassian JIRA (v6.3.4#6332)