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29 discussions - 134 posts

  • In Zab, assume we have a cluster consists of 3-servers. To deliver a write request, it must run 3 communication steps proposal, acknowledgement and commit. As Zab uses reliable FIFO, it is possible ...
    Ibrahim El-sanosi (PGR)Ibrahim El-sanosi (PGR)
    Sep 28, 2015 at 11:19 am
    Oct 5, 2015 at 5:59 pm
  • Assume we use ZooKeeper 3.4.6 and we have 3-server cluster. Leader (L), follower1 (F1) and follower2 (F2). The scenario is as following: 1. Leader sends a proposal with Zxid = 10. 2. F2 crashes ...
    Ibrahim El-sanosi (PGR)Ibrahim El-sanosi (PGR)
    Sep 27, 2015 at 3:51 pm
    Oct 5, 2015 at 5:26 pm
  • I am working on designing the zookeeper node hierarchy so looking for some suggestion. I have a clients node under which I will have multiple clients (for ex: client_100, client_101) ...
    Check PeckCheck Peck
    Sep 12, 2015 at 9:59 pm
    Sep 14, 2015 at 1:36 am
  • The Apache ZooKeeper PMC is pleased to announce that Chris Nauroth has accepted to become a committer. Chris has been a great contributor and very active in the community. Congrats, Chris! -Flavio
    Flavio JunqueiraFlavio Junqueira
    Sep 28, 2015 at 2:42 pm
    Sep 29, 2015 at 5:48 pm
  • Hi I am trying to get a better understanding of Zookeeper and how it should be used. Let’s talk about the lock recipe (http://zookeeper.apache.org/doc/r3.4.6/recipes.html#sc_recipes_Locks). - X ...
    Sep 12, 2015 at 9:47 pm
    Sep 13, 2015 at 9:09 pm
  • Hi, I am using zookeeper 3.4.6 I have a spark cluster configured with HA. Once per 1-2 days, the active spark master is shutting down with a message 15/09/23 18:58:18 INFO zookeeper.ClientCnxn ...
    Akmal AbbasovAkmal Abbasov
    Sep 24, 2015 at 12:24 pm
    Oct 1, 2015 at 2:35 pm
  • Hi, First I build a 3 nodes cluster (A,B,C) with zk.reconfig commands. Now we stop the all the ZK, and we make a new cluster (A,B,D) configured with the same ports. In that scenario, if you start C, ...
    Benjamin JatonBenjamin Jaton
    Sep 9, 2015 at 6:04 pm
    Sep 10, 2015 at 6:40 pm
  • Hi All I am running ZK as a 3 node cluster. Each ZK instance is a VMWare VM in a distinct ESX host. Let's assume the three VMs are A, B and C where A is the leader. Now if I take down VM B and C and ...
    Bill HastingsBill Hastings
    Sep 10, 2015 at 5:42 am
    Sep 10, 2015 at 6:44 am
  • I have a simple requirement as I am using Zookeeper with Curator. I have a znode like this "/test/clients/" and some other application will create a znode under "/test/clients/" with some data in it ...
    Check PeckCheck Peck
    Sep 4, 2015 at 10:18 pm
    Sep 9, 2015 at 8:27 pm
  • Hi, I cant cluster three nodes. They all are standalone. Here is the zoo.cgf for each the myid for each is 1,2,3 myid is located in /var/lib/zookeeper/myid tickTime=3000 initLimit=10 syncLimit=5 ...
    David MontgomeryDavid Montgomery
    Sep 28, 2015 at 2:28 pm
    Sep 29, 2015 at 2:11 am
  • I am seeing very weird issue when using DistributedQueue recipe in Curator. I am thinking it might be a bug in Zookeeper or Curator but not sure yet or may be I am doing something silly. I am trying ...
    Check PeckCheck Peck
    Sep 19, 2015 at 4:40 am
    Sep 23, 2015 at 9:36 pm
  • You’d need to add each level to the ChildReaper. You can also move to ZooKeeper 3.5.1-alpha and Curator 2.9.0 and you’ll get automatic cleanup (via Container nodes). -Jordan On September 17, 2015 at ...
    Jordan ZimmermanJordan Zimmerman
    Sep 17, 2015 at 1:39 pm
    Sep 17, 2015 at 3:02 pm
  • Hi I have been reading a lot about Zookeeper lately because we have the requirement to distribute our workflow engine (for performance and reliability reasons). Currently, we have a single instance ...
    Sep 9, 2015 at 8:29 pm
    Sep 9, 2015 at 9:30 pm
  • Hello Folks, I am trying to design a distributed queue with Zookeeper. The use case is like this:- A set of 't' tasks to be executed by 'n' nodes in round-robin fashion. But, if any node goes down, ...
    Prabhjot BharajPrabhjot Bharaj
    Sep 2, 2015 at 8:47 am
    Sep 2, 2015 at 2:52 pm
  • Hello Experts I need to migrate an existing 3 node Zk ensemble to a different set of servers in a different networkSo servers A,B,C move to D,E,FWhat is the best way to do that without causing ...
    Snair 123Snair 123
    Sep 29, 2015 at 6:31 pm
    Oct 9, 2015 at 12:52 am
  • Hi, I have a very specific question regarding configuring zookeeper reliable distributed coordination system. While configuring can i use fully qualified domain name / cname instead of IP address. If ...
    Kaushal ShriyanKaushal Shriyan
    Sep 30, 2015 at 10:26 am
    Oct 5, 2015 at 12:20 pm
  • I'm using CDH 5.3, which has ZooKeeper 3.4.5 in it. I configured Kerberos for the CDH cluster and later disabled Kerberos because of some problems. After disabling Kerberos I tried restarting the ...
    Tao XiaoTao Xiao
    Sep 28, 2015 at 2:37 am
    Sep 28, 2015 at 2:32 pm
  • Hi, I've got one of these after a ZK restart... and now ZK doesn't want to start: java.io.IOException: The current epoch, 10 is less than the accepted epoch, f cat version-2/acceptedEpoch 15 cat ...
    Otis GospodnetićOtis Gospodnetić
    Sep 22, 2015 at 4:23 am
    Sep 22, 2015 at 4:04 pm
  • Hello, I'm a bit confused about some config options in zk 3.5.0 alpha I set clientPort and clientPortAddress in zoo.cfg but after starting ZK these are gone from the zoo.cfgIt was my understanding ...
    Sep 8, 2015 at 8:34 pm
    Sep 9, 2015 at 8:01 pm
  • The Apache ZooKeeper team is proud to announce Apache ZooKeeper version 3.5.1-alpha. ZooKeeper is a high-performance coordination service for distributed applications. It exposes common services - ...
    Michi MutsuzakiMichi Mutsuzaki
    Sep 3, 2015 at 5:20 am
    Sep 3, 2015 at 11:05 am
  • Hi folks, How ZooKeeper broadcast protocol (Zab) manage joining/leaving servers, is there separate GM protocol or Zab does manage such task? My answer would be Zab itself manages joining/leaving ...
    Ibrahim El-sanosi (PGR)Ibrahim El-sanosi (PGR)
    Sep 26, 2015 at 8:20 am
    Sep 26, 2015 at 8:51 pm
  • Hi, All, There is only "Alpha" release of ZooKeeper 3.5.0 available on the homepage. Does anyone know when the official ZooKeeper 3.5.0 final release will be available? Thanks Boying
    Lu, BoyingLu, Boying
    Sep 14, 2015 at 1:57 pm
    Sep 14, 2015 at 2:00 pm
  • Hi, I am looking at supporting certificate based authentication in ZK. Any advice on how should I go about it? /Munish
    Munish AgarwalMunish Agarwal
    Sep 11, 2015 at 7:00 pm
    Sep 11, 2015 at 8:00 pm
  • Hi, I got following exceptions when access one node: ls /test [main-SendThread(localhost:2181)] WARN org.apache.zookeeper.ClientCnxn - Session 0x14f973545fe0000 for server ...
    Lee EricLee Eric
    Sep 4, 2015 at 7:26 am
    Sep 4, 2015 at 7:52 am
  • Hi, All, I want to try ZooKeeper 3.5.0 alpha release in my IPv6 environment. But it reports an error which says that the format of server.x is not correct. Checking the code, I found that ZK uses ':' ...
    Lu, BoyingLu, Boying
    Sep 15, 2015 at 3:33 am
    Sep 15, 2015 at 3:33 am
  • Hi, I've read [1] & [2] and am trying to understand initLimit and syncLimit configuration parameters a bit better. I have three specific questions I'd like to have answered better: - Is the syncLimit ...
    Jens RantilJens Rantil
    Sep 13, 2015 at 4:57 pm
    Sep 13, 2015 at 4:57 pm
  • Hello, The Apache Curator team is pleased to announce the release of version 2.9.0. The Apache Curator Java libraries make using Apache ZooKeeper much easier and more reliable. Link to release ...
    Mike DrobMike Drob
    Sep 10, 2015 at 5:21 pm
    Sep 10, 2015 at 5:21 pm
  • Hi, Here at Salesforce we're trying to roll out ZK to production for coordinating our search service. One of our requirements is to use Kerberos auth for ZK <--- client communication. While it seems ...
    Irfan HamidIrfan Hamid
    Sep 10, 2015 at 4:17 pm
    Sep 10, 2015 at 4:17 pm
  • A user wrote to the solr-user mailing list asking how they could set the source address for zookeeper connections from their multi-homed SolrCloud install. Solr doesn't have any way to configure ...
    Shawn HeiseyShawn Heisey
    Sep 8, 2015 at 11:06 pm
    Sep 8, 2015 at 11:06 pm
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51 users for September 2015

Jordan Zimmerman: 18 posts Check Peck: 15 posts Flavio P JUNQUEIRA: 10 posts Ibrahim El-sanosi (PGR): 7 posts Alexander Shraer: 6 posts Simon: 5 posts Chris Nauroth: 4 posts Karol Dudzinski: 4 posts Benjamin Jaton: 3 posts Bill Hastings: 3 posts Cameron McKenzie: 3 posts Edward Ribeiro: 3 posts Emmanuel: 3 posts Jens Rantil: 3 posts Otis Gospodnetić: 3 posts Prabhjot Bharaj: 3 posts Raúl Gutiérrez Segalés: 3 posts David Montgomery: 2 posts Ivan Kelly: 2 posts Lu, Boying: 2 posts
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