Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id A1D81200BF2 for ; Mon, 2 Jan 2017 21:16:03 +0100 (CET) Received: by cust-asf.ponee.io (Postfix) id A084A160B22; Mon, 2 Jan 2017 20:16:03 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id E8AD2160B16 for ; Mon, 2 Jan 2017 21:16:02 +0100 (CET) Received: (qmail 40733 invoked by uid 500); 2 Jan 2017 20:16:02 -0000 Mailing-List: contact dev-help@kafka.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@kafka.apache.org Delivered-To: mailing list dev@kafka.apache.org Received: (qmail 40722 invoked by uid 99); 2 Jan 2017 20:16:02 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 02 Jan 2017 20:16:02 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id B61112C2A6B for ; Mon, 2 Jan 2017 20:16:01 +0000 (UTC) Date: Mon, 2 Jan 2017 20:16:01 +0000 (UTC) From: "Ewen Cheslack-Postava (JIRA)" To: dev@kafka.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (KAFKA-3959) __consumer_offsets wrong number of replicas at startup MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Mon, 02 Jan 2017 20:16:03 -0000 [ https://issues.apache.org/jira/browse/KAFKA-3959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Ewen Cheslack-Postava updated KAFKA-3959: ----------------------------------------- Fix Version/s: 0.10.2.0 > __consumer_offsets wrong number of replicas at startup > ------------------------------------------------------ > > Key: KAFKA-3959 > URL: https://issues.apache.org/jira/browse/KAFKA-3959 > Project: Kafka > Issue Type: Bug > Components: consumer, offset manager, replication > Affects Versions: 0.9.0.1, 0.10.0.0 > Environment: Brokers of 3 kafka nodes running Red Hat Enterprise Linux Server release 7.2 (Maipo) > Reporter: Alban Hurtaud > Assignee: Onur Karaman > Labels: reliability > Fix For: 0.10.2.0 > > > When creating a stack of 3 kafka brokers, the consumer is starting faster than kafka nodes and when trying to read a topic, only one kafka node is available. > So the __consumer_offsets is created with a replication factor set to 1 (instead of configured 3) : > offsets.topic.replication.factor=3 > default.replication.factor=3 > min.insync.replicas=2 > Then, other kafka nodes go up and we have exceptions because the replicas # for __consumer_offsets is 1 and min insync is 2. So exceptions are thrown. > What I missed is : Why the __consumer_offsets is created with replication to 1 (when 1 broker is running) whereas in server.properties it is set to 3 ? > To reproduce : > - Prepare 3 kafka nodes with the 3 lines above added to servers.properties. > - Run one kafka, > - Run one consumer (the __consumer_offsets is created with replicas =1) > - Run 2 more kafka nodes -- This message was sent by Atlassian JIRA (v6.3.4#6332)