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 C08C9174C4 for ; Wed, 29 Apr 2015 04:12:06 +0000 (UTC) Received: (qmail 92915 invoked by uid 500); 29 Apr 2015 04:12:06 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 92837 invoked by uid 500); 29 Apr 2015 04:12:06 -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 92471 invoked by uid 99); 29 Apr 2015 04:12:06 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 29 Apr 2015 04:12:06 +0000 Date: Wed, 29 Apr 2015 04:12:06 +0000 (UTC) From: "surendra singh lilhore (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-8277) Safemode enter fails when Standby NameNode is down 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-8277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14518688#comment-14518688 ] surendra singh lilhore commented on HDFS-8277: ---------------------------------------------- I would like to work on this. I will update the status soon > Safemode enter fails when Standby NameNode is down > -------------------------------------------------- > > Key: HDFS-8277 > URL: https://issues.apache.org/jira/browse/HDFS-8277 > Project: Hadoop HDFS > Issue Type: Bug > Components: ha, HDFS, namenode > Affects Versions: 2.6.0 > Environment: HDP 2.2.0 > Reporter: Hari Sekhon > Priority: Minor > > HDFS fails to enter safemode when the Standby NameNode is down (eg. due to AMBARI-10536). > {code}hdfs dfsadmin -safemode enter > safemode: Call From nn2/x.x.x.x to nn1:8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused{code} > This appears to be a bug in that it's not trying both NameNodes like the standard hdfs client code does, and is instead stopping after getting a connection refused from nn1 which is down. I verified normal hadoop fs writes and reads via cli did work at this time, using nn2. I happened to run this command as the hdfs user on nn2 which was the surviving Active NameNode. > After I re-bootstrapped the Standby NN to fix it the command worked as expected again. > Hari Sekhon > http://www.linkedin.com/in/harisekhon -- This message was sent by Atlassian JIRA (v6.3.4#6332)