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 89069172FA for ; Thu, 16 Apr 2015 17:07:59 +0000 (UTC) Received: (qmail 50776 invoked by uid 500); 16 Apr 2015 17:07:59 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 50720 invoked by uid 500); 16 Apr 2015 17:07:59 -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 50707 invoked by uid 99); 16 Apr 2015 17:07:59 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 16 Apr 2015 17:07:59 +0000 Date: Thu, 16 Apr 2015 17:07:59 +0000 (UTC) From: "Brahma Reddy Battula (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (HDFS-8161) Both Namenodes are in standby State 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-8161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Brahma Reddy Battula updated HDFS-8161: --------------------------------------- Description: Suspected Scenario: ================ Start cluster with three Nodes. Reboot Machine where ZKFC is not running..( Here Active Node ZKFC should open session with this ZK ) Now ZKFC ( Active NN's ) session expire and try re-establish connection with another ZK...Bythe time ZKFC ( StndBy NN's ) will try to fence old active and create the active Breadcrumb and Makes SNN to active state.. But immediately it fence to standby state.. ( Here is the doubt) Hence both will be in standby state.. was: Scenario: ======== Start cluster with three Nodes. Reboot Machine where ZKFC is not running..( Here Active Node ZKFC should open session with this ZK ) Now ZKFC ( Active NN's ) session expire and try re-establish connection with another ZK...Bythe time ZKFC ( StndBy NN's ) will try to fence old active and create the active Breadcrumb and Makes SNN to active state.. But immediately it fence to standby state.. ( Here is the doubt) Hence both will be in standby state.. > Both Namenodes are in standby State > ----------------------------------- > > Key: HDFS-8161 > URL: https://issues.apache.org/jira/browse/HDFS-8161 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: Brahma Reddy Battula > Assignee: Brahma Reddy Battula > Attachments: ACTIVEBreadcumb and StandbyElector.txt > > > Suspected Scenario: > ================ > Start cluster with three Nodes. > Reboot Machine where ZKFC is not running..( Here Active Node ZKFC should open session with this ZK ) > Now ZKFC ( Active NN's ) session expire and try re-establish connection with another ZK...Bythe time ZKFC ( StndBy NN's ) will try to fence old active and create the active Breadcrumb and Makes SNN to active state.. > But immediately it fence to standby state.. ( Here is the doubt) > Hence both will be in standby state.. -- This message was sent by Atlassian JIRA (v6.3.4#6332)