From dev-return-79302-archive-asf-public=cust-asf.ponee.io@zookeeper.apache.org Sun Mar 17 08:28:51 2019 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 792E7180629 for ; Sun, 17 Mar 2019 09:28:50 +0100 (CET) Received: (qmail 64192 invoked by uid 500); 17 Mar 2019 08:28:49 -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 64180 invoked by uid 99); 17 Mar 2019 08:28:49 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 17 Mar 2019 08:28:49 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id A95C5C61AD for ; Sun, 17 Mar 2019 08:28:48 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.301 X-Spam-Level: X-Spam-Status: No, score=-110.301 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, 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 (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id qnlbqCNMQEX5 for ; Sun, 17 Mar 2019 08:28:47 +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 E58715F5A1 for ; Sun, 17 Mar 2019 08:22:00 +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 69C6EE00A7 for ; Sun, 17 Mar 2019 08:22:00 +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 0F03224595 for ; Sun, 17 Mar 2019 08:22:00 +0000 (UTC) Date: Sun, 17 Mar 2019 08:22:00 +0000 (UTC) From: "Igor Skokov (JIRA)" To: dev@zookeeper.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Created] (ZOOKEEPER-3320) Don't give up on bind of leader election port MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 Igor Skokov created ZOOKEEPER-3320: -------------------------------------- Summary: Don't give up on bind of leader election port Key: ZOOKEEPER-3320 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3320 Project: ZooKeeper Issue Type: Bug Components: leaderElection Affects Versions: 3.5.4, 3.4.10 Reporter: Igor Skokov When trying to run Zookeeper 3.5.4 cluster on Kubernetes, I found out that = in some circumstances Zookeeper node stop listening on leader election port= . This cause unavailability of ZK cluster.=20 Zookeeper deployed =C2=A0as StatefulSet in term of Kubernetes and has follo= wing dynamic configuration: {code:java} zookeeper-0.zookeeper:2182:2183:participant;2181 zookeeper-1.zookeeper:2182:2183:participant;2181 zookeeper-2.zookeeper:2182:2183:participant;2181 {code} Bind address contains DNS name which generated by Kubernetes for each State= fulSet pod. These DNS names will become resolvable after container start, but with some= delay. That delay cause stopping of leader election port listener in Quoru= mCnxManager.Listener class. Error happens in QuorumCnxManager.Listener "run" method, it tries to bind l= eader election port to hostname which not resolvable at this moment. Retry = count is hard-coded and equals to 3(with backoff of 1 sec).=20 Zookeeper server log contains following errors: {code:java} 2019-03-17 07:56:04,844 [myid:1] - WARN [QuorumPeer[myid=3D1](plain=3D/0.0= .0.0:2181)(secure=3Ddisabled):QuorumPeer@1230] - Unexpected exception java.net.SocketException: Unresolved address =09at java.base/java.net.ServerSocket.bind(ServerSocket.java:374) =09at java.base/java.net.ServerSocket.bind(ServerSocket.java:335) =09at org.apache.zookeeper.server.quorum.Leader.(Leader.java:241) =09at org.apache.zookeeper.server.quorum.QuorumPeer.makeLeader(QuorumPeer.j= ava:1023) =09at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:122= 6) 2019-03-17 07:56:04,844 [myid:1] - WARN [QuorumPeer[myid=3D1](plain=3D/0.0= .0.0:2181)(secure=3Ddisabled):QuorumPeer@1261] - PeerState set to LOOKING 2019-03-17 07:56:04,845 [myid:1] - INFO [QuorumPeer[myid=3D1](plain=3D/0.0= .0.0:2181)(secure=3Ddisabled):QuorumPeer@1136] - LOOKING 2019-03-17 07:56:04,845 [myid:1] - INFO [QuorumPeer[myid=3D1](plain=3D/0.0= .0.0:2181)(secure=3Ddisabled):FastLeaderElection@893] - New election. My id= =3D 1, proposed zxid=3D0x0 2019-03-17 07:56:04,846 [myid:1] - INFO [WorkerReceiver[myid=3D1]:FastLead= erElection@687] - Notification: 2 (message format version), 1 (n.leader), 0= x0 (n.zxid), 0xf (n.round), LOOKING (n.state), 1 (n.sid), 0x0 (n.peerEPoch)= , LOOKING (my state)0 (n.config version) 2019-03-17 07:56:04,979 [myid:1] - INFO [zookeeper-0.zookeeper:2183:Quorum= CnxManager$Listener@892] - Leaving listener 2019-03-17 07:56:04,979 [myid:1] - ERROR [zookeeper-0.zookeeper:2183:Quorum= CnxManager$Listener@894] - As I'm leaving the listener thread, I won't be a= ble to participate in leader election any longer: zookeeper-0.zookeeper:218= 3 {code} This error happens on most nodes on cluster start and Zookeeper is unable t= o form quorum. This will leave cluster in unusable state. As I can see, error present on branches 3.4 and 3.5.=20 I think, this error can be fixed by configurable number of retries(instead = of hard-coded value of 3).=20 Other way to fix this is removing of max retries at all. Currently, ZK serv= er only stop leader election listener and continue to serve on other ports.= May be, if leader election halts, we should abort process. -- This message was sent by Atlassian JIRA (v7.6.3#76005)