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Questions tagged [zookeeper]

48 questions
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zookeeper ssl alert "alert bad certificate"

I am using Kafka (version 2.3.0) and Zookeeper (version 3.5.5-3) - the stable version is 3.6.3. When I test the SSL of my Zookeeper using this command: openssl s_client -showcerts -connect 127.0.0.1:2280 -CAfile /certs/ca-chain.cert.pem and I am…
John Mark
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Zookeeper ensemble leader reporting incorrect number of followers

I have a zookeeper ensemble running in Kubernetes consisting of 3 instances. The ensemble operates mostly correctly and successfully services the Solr cluster it is backing. One thing does seem incorrect however, and it's breaking some health checks…
Taz
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How can I further analyze ram usage in a possible leak? [debian@HyperV + Kafka + Zookeeper]

We have a 3-box cluster Kafka+Zookeeper, in a virtualized enviroment (in Windows 2019 HyperV). In the machines' config dynamic memory is disabled, and they have 4G RAM each (I know it's a very few amount for this kind of cluster, but the usage is…
Mise
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zookeeper server due unable to load database on disk

We have kafka cluster with 3 nodes , each kafka include zookeeper server and schema registry We get the following error on one of the zookeeper server [2019-11-12 07:44:20,719] ERROR Unable to load database on disk…
shalom
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hadoop + can we install zookeeper servers on kafka hosts

we want to dedicated the zookeeper servers only for kafka machines so each kafka machine include the zookeeper server and zookeeper server will serve only the kafka host and not other application in that case is it ok?
shalom
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Dose zookeeper servers must use SSD disks?

we want to install kafka cluster and 3 zookeeper servers kafka should use the zookeeper servers in order to save the metadata on the zookeeper servers ZK Data and Log files should be on disks, which have least contention from other I/O activities.…
shalom
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kafka with ACL fails to connect zk and stops

I have a kafka installation (with ssl listener and ssl client authentication). It works fine until I try to add ACL. this is the error (full error in the bottom): [edit-1] the first error on kafka startup is this: [2018-07-25 14:15:10,498] ERROR…
ozma
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How to manage failover in ZooKeeper across datacenters using observers

I have an application running in 3 different datacenters that uses ZooKeeper for many tasks. Following the recommended practices, we have deployed three ZooKeeper ensembles where one datacenter contains common ZooKeeper instances and the other two…
Matheus Portela
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Why does DFSZKFailoverController kills Namenode process in hadoop?

I try to configure hadoop high availability cluster by following this tutorial: http://www.edureka.co/blog/how-to-set-up-hadoop-cluster-with-hdfs-high-availability/ When I follow that article I faces with two main problems: 1. hdfs namenode…
Oleksandr
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Zookeeper will not join the cluster. How to apply patch/upgrade?

I am running a 3 node zookeeper ensemble on ubuntu 14.04. After noticing that node1 was not running, I had to remove the snapshots of this node and now the server did start, but refuses to join the cluster. This is the log from zookeeper: 2016-01-15…
merlin
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How to add second ZooKeeper to same machine?

I am running 2 dedicated servers on which I plan to install Solrcloud. I have installed ZooKeeper using apt-get install zookeeperd and ZooKeeper is running on both systems. From solr docs I learned that 3 zookeepers are recommended for…
merlin
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Why does Accumulo require $ZOOKEEPER_HOME in addition to the IPs of the Zookeeper ensemble?

According to the documentation, Accumulo requires you to set $ZOOKEEPER_HOME (a local path) in the configuration files, and also requires a list of IPs for the Zookeeper ensemble. Why are IPs alone not sufficient? What if your Zookeeper ensemble is…
Ianvdl
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HDFS' ZKFC service unable to start

CDH4's ZooKeeper Failover Controller (ZKFC) has been installed. Starting the ZKFC service: [vagrant@localhost ~]$ sudo service hadoop-hdfs-zkfc start Starting Hadoop zkfc: [ OK ] starting…
030
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Separate Apache Kafka clusters unreachable at the same time - kafka_network_socketserver_networkprocessoravgidlepercent goes to zero

We have 4 Kafka clusters: ENV1: 6 brokers and 3 zookeepers ENV2: 6 brokers and 3 zookeepers ENV3: 8 brokers (on 2 DCs, 4-4 brokers) and 9 zookeepers (on 3 DCs, 3-3-3 nodes) ENV4: 16 brokers (on 2 DCs, 8-8 brokers) and 9 zookeepers (on 3 DCs, 3-3-3…
jakabl
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Clickhouse server can't connect to Zookeeper

I am running Clickhouse server on a Azure VM and trying to create a table using ReplicatedMergeTree engine (following this guide: https://medium.com/@merticariug/distributed-clickhouse-configuration-d412c211687c). I have zookeeper running on another…
Heyb
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