Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 8425AEA07 for ; Fri, 1 Feb 2013 22:40:14 +0000 (UTC) Received: (qmail 13398 invoked by uid 500); 1 Feb 2013 22:40:13 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 13359 invoked by uid 500); 1 Feb 2013 22:40:13 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 13207 invoked by uid 99); 1 Feb 2013 22:40:13 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 01 Feb 2013 22:40:13 +0000 Date: Fri, 1 Feb 2013 22:40:13 +0000 (UTC) From: "Lars Hofhansl (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Resolved] (HBASE-7728) deadlock occurs between hlog roller and hlog syncer 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/HBASE-7728?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Lars Hofhansl resolved HBASE-7728. ---------------------------------- Resolution: Fixed Hadoop Flags: Reviewed > deadlock occurs between hlog roller and hlog syncer > --------------------------------------------------- > > Key: HBASE-7728 > URL: https://issues.apache.org/jira/browse/HBASE-7728 > Project: HBase > Issue Type: Bug > Components: wal > Affects Versions: 0.94.2 > Environment: Linux 2.6.18-164.el5 x86_64 GNU/Linux > Reporter: Wang Qiang > Assignee: Ted Yu > Priority: Blocker > Fix For: 0.96.0, 0.94.5 > > Attachments: 7728-0.94-simplified.txt, 7728-0.94.txt, 7728-0.94-v2.txt, 7728-suggest-0.96.txt, 7728-suggest.txt, 7728-v1.txt, 7728-v2.txt, 7728-v3.txt, 7728-v4.txt > > > the hlog roller thread and hlog syncer thread may occur dead lock with the 'flushLock' and 'updateLock', and then cause all 'IPC Server handler' thread blocked on hlog append. the jstack info is as follow : > "regionserver60020.logRoller": > at org.apache.hadoop.hbase.regionserver.wal.HLog.syncer(HLog.java:1305) > - waiting to lock <0x000000067bf88d58> (a java.lang.Object) > at org.apache.hadoop.hbase.regionserver.wal.HLog.syncer(HLog.java:1283) > at org.apache.hadoop.hbase.regionserver.wal.HLog.sync(HLog.java:1456) > at org.apache.hadoop.hbase.regionserver.wal.HLog.cleanupCurrentWriter(HLog.java:876) > at org.apache.hadoop.hbase.regionserver.wal.HLog.rollWriter(HLog.java:657) > - locked <0x000000067d54ace0> (a java.lang.Object) > at org.apache.hadoop.hbase.regionserver.LogRoller.run(LogRoller.java:94) > at java.lang.Thread.run(Thread.java:662) > "regionserver60020.logSyncer": > at org.apache.hadoop.hbase.regionserver.wal.HLog.syncer(HLog.java:1314) > - waiting to lock <0x000000067d54ace0> (a java.lang.Object) > - locked <0x000000067bf88d58> (a java.lang.Object) > at org.apache.hadoop.hbase.regionserver.wal.HLog.syncer(HLog.java:1283) > at org.apache.hadoop.hbase.regionserver.wal.HLog.sync(HLog.java:1456) > at org.apache.hadoop.hbase.regionserver.wal.HLog$LogSyncer.run(HLog.java:1235) > at java.lang.Thread.run(Thread.java:662) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira