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1,696 discussions - 7,378 posts

  • Hi all, I'm using zookeeper for dynamic config management among spring apps hosted on many servers. I'm trying to employ SSL for communication between these java app and zookeeper since these ...
    Vaibhav DevekarVaibhav Devekar
    Jun 16, 2016 at 11:27 pm
    Jun 17, 2016 at 9:05 pm
  • Hi I am getting this socket connection closed intermittently running on Windows 7 and ZK 3.r.0-alpha. Is this a known issue?
    J316 ServicesJ316 Services
    Jun 16, 2016 at 1:39 pm
    Jun 16, 2016 at 9:36 pm
  • Getting 503... https://issues.apache.org/jira/browse/ZOOKEEPER-1423 Sent from my iPad
    J316 ServicesJ316 Services
    Jun 16, 2016 at 1:15 am
    Jun 16, 2016 at 1:24 am
  • FYI - I wrote a blog about backing up ZooKeeper: https://www.elastic.co/blog/zookeeper-backup-a-treatise -Jordan
    Jordan ZimmermanJordan Zimmerman
    Jun 15, 2016 at 11:43 pm
    Jun 18, 2016 at 2:50 pm
  • Hi, I'm working on taking periodic snapshots of zookeeper data dir for backup(point-in-time) and recovery. I am using Zookeeper 3.4.5 version. I'm just wondering whether there will be a race ...
    GokulGokul
    Jun 15, 2016 at 6:00 pm
    Jun 16, 2016 at 6:52 am
  • Good book on interview preparation for big data https://notionpress.com/read/big-data-interview-faqs
    Chaturvedi CholaChaturvedi Chola
    Jun 15, 2016 at 11:41 am
    Jun 15, 2016 at 11:41 am
  • I am trying to figure out if it is possible to remove a node that is offline from quorum. Use case is my one data center is offline and I need to programmatically reduce quorum to the number of ...
    Nomar MoradoNomar Morado
    Jun 14, 2016 at 9:46 pm
    Jun 15, 2016 at 3:00 am
  • Hi I was trying to promote an observer into participant when ZK loses quorum - but it seems that it does not allow to. Would you know how this can be accomplished without having to recycle ZK? I am ...
    Nomar MoradoNomar Morado
    Jun 14, 2016 at 3:54 pm
    Jun 15, 2016 at 2:34 pm
  • Zookeeper 3.5.1 (https://github.com/apache/zookeeper/releases/tag/release-3.5.1) dynamic configuration fails with two servers that are started one after the other throwing an EOFException. This is ...
    Sebastian MattheisSebastian Mattheis
    Jun 10, 2016 at 1:07 pm
    Jun 12, 2016 at 8:46 pm
  • Hello, There is a 3.5.1 tag in SVN http://svn.apache.org/repos/asf/zookeeper/tags/release-3.5.1/ along with a couple of 3.5.1-rc. It was created 9 months ago. Why is the corresponding binary package ...
    Gérald QuintanaGérald Quintana
    Jun 9, 2016 at 6:55 am
    Jun 15, 2016 at 4:16 pm
  • Hello, We are currently facing some security issues with Zookeeper version 3.4.7 & 3.4.8, since its bundled with very old version of Netty:jar, version 3.7.0. Could you address this issue in future ...
    Hegde, PallaviHegde, Pallavi
    Jun 6, 2016 at 8:40 pm
    Jun 15, 2016 at 6:27 am
  • We have two data centers and got two servers at each. At an event of a data center failure, with the quorum majority rule - the other surviving data center seems to be no use at all and we'll be out ...
    J316 ServicesJ316 Services
    Jun 2, 2016 at 10:06 pm
    Jun 4, 2016 at 2:37 pm
  • Linking from the cwiki would be great. If you send your cwiki id to me/flavio one of us will give you edit privs. https://cwiki.apache.org/confluence/display/ZOOKEEPER/Index there is an existing ...
    Patrick HuntPatrick Hunt
    Jun 1, 2016 at 10:12 pm
    Jun 2, 2016 at 4:06 pm
  • sdasdad
    Zhu_shuaiZhu_shuai
    Jun 1, 2016 at 9:40 am
    Jun 1, 2016 at 12:11 pm
  • Hi, This is my first post to this mailing list. I tried searching the archives for similar answers but could not conclude anything definite on this subject. I am looking forward to use Zookeeper ...
    Sanjiv Kumar GuptaSanjiv Kumar Gupta
    Jun 1, 2016 at 5:17 am
    Jun 1, 2016 at 11:41 am
  • I would like to share a post I wrote on ZAB architecture: https://distributedalgorithm.wordpress.com/2015/06/20/architecture-of-zab-zookeeper-atomic-broadcast-protocol/ ...
    Guy MoshkowichGuy Moshkowich
    May 28, 2016 at 3:24 pm
    May 31, 2016 at 6:37 pm
  • We have multiple data centers and a ZK cluster deployed in each. One of the needs of our application is to have a specific feature see the same state in each DC (though if propagation takes a long ...
    David CapwellDavid Capwell
    May 26, 2016 at 5:16 pm
    May 31, 2016 at 5:09 pm
  • Hi ZooKeeper users, I have a use-case where I need to create a very large number (~70,000) of child nodes under a parent. These nodes themselves contain no data and will only have a handful of child ...
    Szekeres, ZoltanSzekeres, Zoltan
    May 25, 2016 at 9:35 am
    Jun 8, 2016 at 9:08 pm
  • +user mailing list ---------- Forwarded message ---------- From: Yufeng Jiang <<span class="m_body_email_addr" title="58a642530895dfba5837206d4847e67a" yufengjiang100@gmail.com</span Date: Fri, May ...
    Yufeng JiangYufeng Jiang
    May 15, 2016 at 3:18 pm
    May 15, 2016 at 3:18 pm
  • Hello everyone, Two days back i created a jira for an issue which we are facing in our application while using zookeeper. Jira no is - 2428 ,https://issues.apache.org/jira/browse/ZOOKEEPER-2428 But ...
    Saurabh jainSaurabh jain
    May 14, 2016 at 12:12 am
    May 14, 2016 at 1:22 pm
  • Running a 3 node cluster of 3.4.6. Can I mix 3.4.8 with 3.4.6? I want to keep the cluster up by upgrading 1 node at a time. So there will be a mix of versions for a short period of time.
    Dillian MurpheyDillian Murphey
    May 13, 2016 at 3:52 pm
    May 13, 2016 at 7:38 pm
  • Hi, We are considering CMS vs G1 for ZooKeeper running under Oracle JDK8. The expected heap size is 4-6GB. How workload-specific is this choice in your opinion and it what ways? E.g. if many short ...
    Guy LadenGuy Laden
    May 13, 2016 at 2:18 pm
    May 16, 2016 at 12:18 pm
  • Just tried to setup a 2 zookeeper cluster for the first time one each for my 2 Kafka broker cluster and came across following issues: 1. Do we have to specify a separate value in vim ...
    R KrishnaR Krishna
    May 13, 2016 at 10:16 am
    May 16, 2016 at 10:14 pm
  • Hello Everyone is there any way to extend ZooKeeper data structure without breaking the backward compatibility. Suppose I want to add cuser field in StatPersisted class StatPersisted { ....... ...
    Mohammad arshadMohammad arshad
    May 11, 2016 at 10:14 am
    May 11, 2016 at 9:13 pm
  • Hi, We have a couple of clusters connected to the same Zookeeper cluster and the clients make and terminate sessions at random times. Is it possible for a client to 'tag' the zookeeper session so ...
    Arun M. KrishnakumarArun M. Krishnakumar
    May 9, 2016 at 6:06 pm
    May 10, 2016 at 6:44 am
  • Interesting root cause and mitigations discussion. https://www.elastic.co/blog/elastic-cloud-outage-april-2016 Patrick
    Patrick HuntPatrick Hunt
    May 9, 2016 at 2:38 am
    May 9, 2016 at 5:49 pm
  • Hello, I have a 2 nodes ZK ensemble, the first node shows: WARN [QuorumPeer[myid=1](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Follower@93] - Exception when following the leader ...
    Benjamin JatonBenjamin Jaton
    May 4, 2016 at 9:55 pm
    May 12, 2016 at 11:05 pm
  • Hi All, I am getting the following error in server start up. *ZooKeeper JMX enabled by default* *Using config: /home/pranavan/2K16/zookeeper-3.4.8/bin/../conf/zoo.cfg* *mkdir: cannot create directory ...
    Pranavan TheivendiramPranavan Theivendiram
    May 4, 2016 at 2:50 am
    May 9, 2016 at 12:14 pm
  • Hi, I am very keen on using the container znode functionality in 2.5.1-alpha. Do you have any status on the release? Is anyone running this in production? Is a non-alpha release of 2.5.X planned in ...
    Jens RantilJens Rantil
    May 3, 2016 at 12:48 pm
    May 6, 2016 at 9:35 pm
  • Dear exports, I have a theme called 'Zookeeper is unable to start'.The reason I have found as following: I have make a mistake in the file regionservers.Nodeserver's IP should be written in the ...
    Eric GaoEric Gao
    May 3, 2016 at 3:13 am
    May 3, 2016 at 3:13 am
  • i want to make a server with lower load be the zookeeper leader permanently. is there any method or configuration?
    WangYQWangYQ
    May 2, 2016 at 10:53 am
    May 3, 2016 at 5:55 pm
  • in zookeeper 3.4.6 documents, there are one chapter about "zookeeper observer" below is the content from this chapter: Observers have other advantages. Because they do not vote, they are not a ...
    WangYQWangYQ
    Apr 26, 2016 at 12:00 pm
    Apr 26, 2016 at 12:00 pm
  • I'm consuming the zookeeper mt C client. I'm unsure of what the behaviour I should take when there is a Zookeeper failure, or interacting with Zookeeper in general. According to the documentation ...
    Sargun DhillonSargun Dhillon
    Apr 26, 2016 at 12:14 am
    Apr 26, 2016 at 12:14 am
  • subscribe request
    WangYQWangYQ
    Apr 22, 2016 at 7:19 am
    Apr 22, 2016 at 7:19 am
  • Dear exports, I have encountered a problem when I have started the zookeeper: [root@master data]# /opt/zookeeper/bin/zkServer.sh start ZooKeeper JMX enabled by default Using config ...
    Eric GaoEric Gao
    Apr 22, 2016 at 2:23 am
    Apr 22, 2016 at 8:10 am
  • Hello, My company is eagerly awaiting a stable zookeeper release that supports SSL between the zkClients and the cluster. Is there anything that we can do to help stabilize the 3.5 branch and bring ...
    Jean-Marc van LeerdamJean-Marc van Leerdam
    Apr 20, 2016 at 4:20 pm
    Apr 25, 2016 at 9:30 pm
  • Hi, I'm having a problem with signal handling and the Zookeeper C client library. In my application, I am masking SIGTERM before calling zookeeper_init and unmasking it after the call returns. I have ...
    SvkSvk
    Apr 17, 2016 at 10:22 pm
    Apr 17, 2016 at 10:22 pm
  • Hi all i'm working on OpenStack and i have build come virtual machines and 2 different networks with it. I have set two mesos clusters: NetworkA: 2 mesos master 2 mesos slaves NetworkB: 1 mesos ...
    Stefano BianchiStefano Bianchi
    Apr 14, 2016 at 1:09 pm
    Apr 28, 2016 at 1:50 am
  • Hi, I'm new to the Zookeeper community. I've started using Zookeeper a few months ago. My current goal is to build a rolling update process for three Zookeeper nodes running on AWS. During the update ...
    Andreas WittigAndreas Wittig
    Apr 13, 2016 at 3:45 pm
    Apr 16, 2016 at 9:45 am
  • Hi everybody, I have an issue on testing ZooKeeper's session expiration. Basically, I am using the chunk of code below to make a "target" ZooKeeper handle expire: ... final ZooKeeper zk = new ...
    Matteo Casadei - DienneaMatteo Casadei - Diennea
    Apr 13, 2016 at 7:39 am
    Apr 13, 2016 at 10:32 am
  • Hi Folks, I am hitting an error in my C client code and below are the set of operations I perform: 1. Zookeeper Client connected to Zookeeper server S1 and a new server S2 gets added. 2. monitor ...
    Pramod SrinivasanPramod Srinivasan
    Apr 11, 2016 at 8:08 pm
    Apr 26, 2016 at 10:05 am
  • We had one of the node giving OOM java.lang.OutOfMemoryError: unable to create new native thread and then being unresponsive. We tried to add the node back to the cluster but with no luck. It doesn't ...
    S influxdbS influxdb
    Apr 7, 2016 at 4:41 am
    Apr 14, 2016 at 9:54 am
  • Hello Folks I am playing with reconfig to grow the zookeeper cluster dynamically, what I observed is that the C client library (don¹t know about the java client) does not automatically reconfigure to ...
    Pramod SrinivasanPramod Srinivasan
    Mar 31, 2016 at 11:54 pm
    Apr 4, 2016 at 4:29 pm
  • Hi, Say I have deployment design where Storm consumes from Kafka and publishes to SolrCloud and I own all 3 deployments + the Zookeeper ensemble. Should I build 3 independent ZK emsembles of 7-9 ...
    Ayon SinhaAyon Sinha
    Mar 30, 2016 at 6:00 am
    Apr 16, 2016 at 9:49 am
  • Hi, I am trying to use Zookeeper to receive logs from a proxy. But all I get in the log lines are 2016-03-27 03:05:17,155 [myid:] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@362] ...
    Daniel NiasoffDaniel Niasoff
    Mar 27, 2016 at 3:07 am
    Mar 27, 2016 at 8:10 am
  • What are the scenarios when dataLengths shows 0 when you do a stat on the znode I couldn't replicate it with zookeeper zkcli.sh or the zookeeper-cli tool Is it that can only be done via a zookeeper ...
    S influxdbS influxdb
    Mar 25, 2016 at 8:59 pm
    Mar 26, 2016 at 8:20 pm
  • Hi, All I have a question about the Sync Operation: //Asynchronous sync. Flushes channel between process and leader. public void sync(final String path, VoidCallback cb, Object ctx) I don't quite ...
    AllanwinAllanwin
    Mar 24, 2016 at 8:43 am
    Mar 24, 2016 at 8:57 am
  • Hi Avinash, I am facing the same problem. I am unable to detect the source of the problem as the producer program is working but consumer is not. Can you please help me out. import ...
    Vineet.salianVineet.salian
    Mar 23, 2016 at 1:50 pm
    Mar 23, 2016 at 2:10 pm
  • Hi all, Assume the Zookeeper have been running for about one year (from 1/1/2015 until now), how does ZooKeeper deal with old delivered write requests (To optimize a memory used) (say from 1/1/2015 ...
    ibrahim El-sanosiibrahim El-sanosi
    Mar 18, 2016 at 4:05 pm
    Mar 23, 2016 at 4:57 pm
  • All, I just filed this JIRA: https://issues.apache.org/jira/browse/ZOOKEEPER-2389 It seems that read-only observer nodes don't properly transition into read-only mode, they fail load any of their ...
    Jason RosenbergJason Rosenberg
    Mar 15, 2016 at 5:15 pm
    Mar 16, 2016 at 2:40 pm
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