As explained by others, Kafka (even in most recent version) will not work without Zookeeper. Kafka uses Zookeeper for the following: Electing a controller. The controller is one of the brokers and is responsible for maintaining the leader/follower relationship for all the partitions.

Furthermore, can I run Kafka without zookeeper?

Kafka 0.9 can run without Zookeeper after all Zookeeper brokers are down. After killing all three Zookeeper nodes the Kafka cluster continues functioning. I am still able to read and write into Kafka topics.

Additionally, what is the relationship between Kafka and zookeeper? Kafka Architecture: Topics, Producers and Consumers Kafka uses ZooKeeper to manage the cluster. ZooKeeper is used to coordinate the brokers/cluster topology. ZooKeeper is a consistent file system for configuration information. ZooKeeper gets used for leadership election for Broker Topic Partition Leaders.

In this regard, what happens if zookeeper goes down in Kafka?

For example, if you lost the Kafka data in ZooKeeper, the mapping of replicas to Brokers and topic configurations would be lost as well, making your Kafka cluster no longer functional and potentially resulting in total data loss.

How do I run Kafka locally?

Quickstart

  1. Step 1: Download the code. Download the 2.4.
  2. Step 2: Start the server.
  3. Step 3: Create a topic.
  4. Step 4: Send some messages.
  5. Step 5: Start a consumer.
  6. Step 6: Setting up a multi-broker cluster.
  7. Step 7: Use Kafka Connect to import/export data.
  8. Step 8: Use Kafka Streams to process data.

Does Kafka consumer need zookeeper?

With kafka 0.9+ the new Consumer API was introduced. New consumers do not need connection to Zookeeper since group balancing is provided by kafka itself.

Why Kafka is faster?

Kafka relies on the filesystem for the storage and caching. The problem is disks are slower than RAM. This is because the seek-time through a disk is large compared to the time required for actually reading the data. Modern operating systems allocate most of their free memory to disk-caching.

How do I run Kafka in production?

Navigate to the Apache Kafka® properties file ( /etc/kafka/server.properties ) and customize the following:
  1. Connect to the same ZooKeeper ensemble by setting the zookeeper.connect in all nodes to the same value.
  2. Configure the broker IDs for each node in your cluster using one of these methods.

What ports Kafka use?

If you are running both on the same machine, you need to open both ports, of corse. kafka default ports: 9092, can be changed on server.

zookeeper default ports:

  • 2181 for client connections;
  • 2888 for follower(other zookeeper nodes) connections;
  • 3888 for inter nodes connections;

What is ZooKeeper in Kafka?

ZooKeeper is a software built by Apache which is used to maintain configuration and naming data along with providing robust and flexible synchronization in the distributed systems. It acts as a centralized service and helps to keep track of the Kafka cluster nodes status, Kafka topics, and partitions.

Is Kafka open source?

Apache Kafka is an open-source stream-processing software platform developed by LinkedIn and donated to the Apache Software Foundation, written in Scala and Java. The project aims to provide a unified, high-throughput, low-latency platform for handling real-time data feeds.

How many ZooKeeper nodes does Kafka have?

You need a minimum of 3 zookeepers nodes and 2 Kafka brokers to have a proper fault tolerant cluster. Recommended minimum fault tolerant cluster would be 3 Kafka brokers and 3 zookeeper nodes with replication factor = 3 on all topics.

Can Kafka run on Windows?

These are the steps to install Kafka on Windows: Before you start installing Kafka, you need to install Zookeeper. Once it is download, extract the files and copy the kafka folder in C drive. Shift+Right click on the Kafka folder and open it using command prompt or powershell.

Why ZooKeeper is required for Kafka?

Kafka is a distributed system and uses Zookeeper to track status of kafka cluster nodes. Zookeeper also plays a vital role for serving many other purposes, such as leader detection, configuration management, synchronization, detecting when a new node joins or leaves the cluster, etc.

How do I start Kafka ZooKeeper?

Installation
  1. Download ZooKeeper from here.
  2. Unzip the file.
  3. The zoo.
  4. The default listen port is 2181.
  5. The default data directory is /tmp/data.
  6. Go to the bin directory.
  7. Start ZooKeeper by executing the command ./zkServer.sh start .
  8. Stop ZooKeeper by stopping the command ./zkServer.sh stop .

How many zookeepers are there?

Generally for that level, 3 zookeepers should be fine. You could bump it up to 5 if you start seeing issues, but we rarely see clusters go higher than that for a zookeeper instance as much higher starts to create quorum overheads.

Why is ZooKeeper used?

Apache ZooKeeper is used for maintaining centralized configuration information, naming, providing distributed synchronization, and providing group services in a simple interface so that we don't have to write it from scratch. Apache Kafka also uses ZooKeeper to manage configuration.

What happens if Kafka goes down?

If one or more brokers are down, the producer will re-try for a certain period of time (based on the settings). And during this time one or more of the consumers will not be able to read anything until the respective brokers are up.

What is ZooKeeper server?

ZooKeeper is an open source Apache project that provides a centralized service for providing configuration information, naming, synchronization and group services over large clusters in distributed systems. The goal is to make these systems easier to manage with improved, more reliable propagation of changes.

Where does zookeeper store its data?

ZooKeeper stores its data in a data directory and its transaction log in a transaction log directory. By default these two directories are the same. The server can (and should) be configured to store the transaction log files in a separate directory than the data files.

How replication works in Kafka?

In Kafka, a message stream is defined by a topic, divided into one or more partitions. Replication happens at the partition level and each partition has one or more replicas. The replicas are assigned evenly to different servers (called brokers) in a Kafka cluster. Each replica maintains a log on disk.

How does Kafka work?

How does it work? Applications (producers) send messages (records) to a Kafka node (broker) and said messages are processed by other applications called consumers. Said messages get stored in a topic and consumers subscribe to the topic to receive new messages.