From dev-return-69362-archive-asf-public=cust-asf.ponee.io@zookeeper.apache.org Mon Apr 30 06:44:04 2018 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id E24A5180647 for ; Mon, 30 Apr 2018 06:44:03 +0200 (CEST) Received: (qmail 46357 invoked by uid 500); 30 Apr 2018 04:44:02 -0000 Mailing-List: contact dev-help@zookeeper.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@zookeeper.apache.org Delivered-To: mailing list dev@zookeeper.apache.org Received: (qmail 46345 invoked by uid 99); 30 Apr 2018 04:44:02 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 30 Apr 2018 04:44:02 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id A600AC0188 for ; Mon, 30 Apr 2018 04:44:01 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -109.511 X-Spam-Level: X-Spam-Status: No, score=-109.511 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, KAM_ASCII_DIVIDERS=0.8, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id LGp1KRiggAiZ for ; Mon, 30 Apr 2018 04:44:01 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id D79AE5F3CE for ; Mon, 30 Apr 2018 04:44:00 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 568C0E0338 for ; Mon, 30 Apr 2018 04:44:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 1330221291 for ; Mon, 30 Apr 2018 04:44:00 +0000 (UTC) Date: Mon, 30 Apr 2018 04:44:00 +0000 (UTC) From: "Michael Han (JIRA)" To: dev@zookeeper.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Assigned] (ZOOKEEPER-2988) NPE triggered if server receives a vote for a server id not in their voting view 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/ZOOKEEPER-2988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Michael Han reassigned ZOOKEEPER-2988: -------------------------------------- Assignee: Brian Nixon > NPE triggered if server receives a vote for a server id not in their voting view > -------------------------------------------------------------------------------- > > Key: ZOOKEEPER-2988 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2988 > Project: ZooKeeper > Issue Type: Bug > Components: leaderElection > Affects Versions: 3.5.3, 3.4.11 > Reporter: Brian Nixon > Assignee: Brian Nixon > Priority: Minor > Fix For: 3.5.4, 3.6.0 > > > We've observed the following behavior in elections when a node is lagging behind the quorum in its view of the ensemble topology. > - Node A is operating with node B in its voting view, but without view of node C. > - B votes for C. > - A then switches its vote to C, but throws a NPE when attempting to connect. > This causes the QuorumPeer to spin up a Follower only to immediately have it shutdown by the exception. > Ideally, A would not advertise a vote for a server that it will not follow. -- This message was sent by Atlassian JIRA (v7.6.3#76005)