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 C45A8118A5 for ; Fri, 12 Sep 2014 13:45:36 +0000 (UTC) Received: (qmail 81016 invoked by uid 500); 12 Sep 2014 13:45:36 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 80970 invoked by uid 500); 12 Sep 2014 13:45:36 -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 80957 invoked by uid 99); 12 Sep 2014 13:45:36 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 12 Sep 2014 13:45:36 +0000 Date: Fri, 12 Sep 2014 13:45:36 +0000 (UTC) From: "Hudson (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-7045) Fix NameNode deadlock when opening file under /.reserved path 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-7045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14131532#comment-14131532 ] Hudson commented on HDFS-7045: ------------------------------ FAILURE: Integrated in Hadoop-Mapreduce-trunk #1894 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1894/]) HDFS-7045. Fix NameNode deadlock when opening file under /.reserved path. Contributed by Yi Liu. (wang: rev 1e684995d7ac20d1c27ca1c1bef37dd2ee00e630) * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRead.java * hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java > Fix NameNode deadlock when opening file under /.reserved path > ------------------------------------------------------------- > > Key: HDFS-7045 > URL: https://issues.apache.org/jira/browse/HDFS-7045 > Project: Hadoop HDFS > Issue Type: Bug > Components: namenode > Reporter: Yi Liu > Assignee: Yi Liu > Priority: Critical > Fix For: 2.6.0 > > Attachments: HDFS-7045.001.patch > > > {{resolvePath}} could throw exception in following case, then deadlock. > * open file under path {{/.reserved/raw}} using a non super user. > * open file under path {{/.reserved/.inodes}}. > {{FSNamesystem#getBlockLocationsUpdateTimes}}: > {code} > ... > if (isReadOp) { // first attempt is with readlock > checkOperation(OperationCategory.READ); > readLock(); > } else { // second attempt is with write lock > checkOperation(OperationCategory.WRITE); > writeLock(); // writelock is needed to set accesstime > } > src = resolvePath(src, pathComponents); > try { > ... > } finally { > if (isReadOp) { > readUnlock(); > } else { > writeUnlock(); > } > } > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)