kafka broker not available

kafka broker not available

That means that our client is going to be using localhost to try to connect to a broker when producing and consuming messages. Should I service / replace / do nothing to my spokes which have done about 21000km before the next longer trip? module kafka-node.BrokerReadable function kafka-node. This catches people out, because theyre used to their laptop being localhost, so it seems puzzling why code running on the laptop cannot connect to localhost. Already on GitHub? 2022-07-27 19:52:01,029 ERROR [parallel-1] c.p.k.u.s.MetricsService: Failed to collect cluster local info, @gosforth ping me on discord so we can take a look together, has it been resolved, facing the same issue. Broker may not be available. This resolved my issue of LEADER_NOT_AVAILABLE and also remote connection of kafka producers/consumers. Your client would bootstrap against one (or more) of these, and that broker would return the metadata of each of the brokers in the cluster to the client. What does it mean that a falling mass in space doesn't sense any force? How can I send a pre-composed email to a Gmail user, for them to edit and send? Its not an obvious way to be running things, but \_()_/. All these examples are using just one broker, which is fine for a sandbox but utterly useless for anything approaching a real environment. Kafka, written in Java and Scala, was first released in 2011 and is an open-source technology, while RabbitMQ was built in Erlang in 2007. On my fresh windows machine, I did a jre (jre-8u221) installation and then followed the steps mentioned in Apache Kafka documentation to start zookeeper, kafka server, send messages through producer etc. What often goes wrong is that the broker is misconfigured and returns an address (the advertised.listener) on which the client cannot correctly connect to the broker. Viewed 19 times. So if I try to produce any message again to that topic after this event, the error will not appear anymore as the topic as been created. I read this to mean that I have 1 Broker available - and it is has an id of 0. Sign in Is "different coloured socks" not correct? I was stuck on this problem and was about to reinstall kafka. By creating a new listener. And if you connect to the broker on 19092, youll get the alternative host and port: host.docker.internal:19092. you can replace it with your ip. Spring integration kafka - listener not responding - how can I figure out why? listeners=PLAINTEXT://localhost:9092 and then restarting kafka. Thats bad news, because on our client machine, there is no Kafka broker at localhost (or if there happened to be, some really weird things would probably happen). or do I need to call it once at the start (so the setTimeout is the right one)? I was specifying the version in pom.xml under properties tag. Run the command from the client machine. For me, I didn't specify broker id for Kafka instance. Apparently Kafka does not work with just any Zookeeper. Can I infer that Schrdinger's cat is dead without opening the box, if I wait a thousand years? and Because I don't want continuously call refreshBrokerMetadata, I used setTimeout. How could a nonprofit obtain consent to message relevant individuals at a company on LinkedIn under the ePrivacy Directive? Connect and share knowledge within a single location that is structured and easy to search. 6 comments didentifier commented on Jul 22, 2020 edited question on Jul 22, 2020 Can you share the full logs - i.e. I was doing on mistake. Let's assume that we know about a broker running at localhost:29092, . These calls are then followed by a lot of: which probably means that at this point, Kafka does not reply any more. Lets change that, and expose 9092 to the host. Is there a place where adultery is a crime? Companies are looking to optimize cloud and tech spend, and being incredibly thoughtful about which priorities get assigned precious engineering and operations resources. Is "different coloured socks" not correct? PS. Duplicate: #1016, Getting below error, while creating the topic before sending pay-load to topics. Its relatively easy to use, super-applicable, and very useful. Usually we see the affected nodes recover. advertised.listeners=PLAINTEXT://:9092. You can find an example of a working docker-compose configuration here. In a previous tutorial, we learned how to work with Spring and Kafka. Until some weeks ago everything worked fine, today I'm trying to starting it and I obtain this error after the boot: I edited advertised.listeners because there is a proxy to redirect requests to the broker. then KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1 tell the Apache kafka that we Wanted to create only one replication and its work. So how do we fix it? Set the JAVA_HOME and Path variables and restarted the machine. node.js - Kafka-node - BrokerNotAvailableError - Stack Overflow If you connect to the broker on 9092, youll get the advertised.listener defined for the listener on that port (localhost). Change the server.properties on the broker from: The original listener remains unchanged. My Python/Java/Spring/Go/Whatever Client Wont Connect to My Apache Kafka Cluster in Docker/AWS/My Brothers Laptop. Zookeeper is like the cluster manager and keeps track of all the brokers. : On the consumer side, if there is no message read after the poll , this warning is thrown. This error means that the current configuration isnt unable to execute a connection to the network, even if everything seems to be in order at first glance. When toying with docker compose it's a bit harder to have a solid understanding of each step and it's faults. Testing Kafka and Spring Boot | Baeldung Would it be possible to build a powerless holographic projector? Kafka Broker not available: Broker socket is closed #1282 - GitHub I backtracked my changes surrounding the Kafka initial set up and figured out below are steps that needs to be taken to fix this. Environment. Am I wrong? Once weve restarted the container, we can check that port 9092 is being forwarded: Lets try our local client again. The client/consumer is . Why wouldn't a plane start its take-off run from the very beginning of the runway to keep the option to utilize the full runway if necessary? After bouncing the broker to pick up the new config, our local client works perfectlyso long as we remember to point it at the new listener port (19092): Over in Docker Compose, we can see that our Docker-based client still works: What about if we invert this and have Kafka running locally on our laptop just as we did originally, and instead run the client in Docker? My situation is that I'm using a wildcard listener and auto-creating a new topic will result in this error. Here is what I do to set up the producer: Kafka itself is set-up with the following docker-compose.yml: so it should be available at kafka:9092. I am using, 1. does not work % ERROR: Local: Host resolution failure: kafka-cluster:9092/1001: Failed to resolve 'kafka-cluster:9092': nodename nor servname provided, or not known. Its written using Python with librdkafka (confluent_kafka), but the principle applies to clients across all languages. We faced the same situation, when we started to search the logs for the actual cause of the error. By default Apache Kafka create the 3 replication, this mean its by default create 3 broker as well. Is there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? In Portrait of the Artist as a Young Man, how can the reader intuit the meaning of "champagne" in the first chapter? Asking for help, clarification, or responding to other answers. It seems to me that these errors are result of some syncrhonization process between zookeeper and kafka during broker startup, because after some time procuder succesfully resent my messages. If not set. In the end the entire podman cluster can be exporte to a kubernetes file and reimported in podman or in kubernetes. This could be a machine on your local network, or perhaps running on cloud infrastructure such as Amazon Web Services (AWS), Microsoft Azure, or Google Cloud Platform (GCP). A religion where everyone is considered a priest. It could be related to advertised.host.name setting in your server.properties. When a client wants to send or receive a message from Apache Kafka , there are two types of connection that must succeed: The initial connection to a broker (the bootstrap). The address used in the initial connection is simply for the client to find a bootstrap server on the cluster of, The client initiates a connection to the bootstrap server(s), which is one (or more) of the brokers on the cluster, The broker returns an incorrect hostname to the client, The client then tries to connect to this incorrect address, and then fails (since the Kafka broker is not on the client machine, which is what, Youre at this point because youre just developing things and trying to get stuff working in whatever way you can and will worry about doing it properly later, Youre building a client application that will run on Docker and connect to Kafka running elsewhere. Prepare to shutdown (kafka.server.KafkaServer) java.lang.RuntimeException: A broker is already registered on the path /brokers/ids/. If you read the tutorial carefully you'll see this matters a lot. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. What if we try to connect to that from our actual Kafka client? happens when kafka is started first and zookeeper after. There is a lot to optimize. @saurabhshcs I have the same problem. Should convert 'k' and 't' sounds to 'g' and 'd' sounds when they follow 's' in a word for pronunciation? Find centralized, trusted content and collaborate around the technologies you use most. How to write guitar music that sounds like the lyrics. We will have more pods all connected to the same kafka server. Not the answer you're looking for? since i have my office laptop ( VPN and proxy was configured ). now i have set the NO_PROXY with localhost and 127.0.0.1, if you want to append to existing values, then, after this , i have restarted zookeeper and kafka Did you checked the server.log to find the reason. Hi Luca. The Knative Broker for Apache Kafka is an implementation of the Knative Broker API natively targeting Apache Kafka to reduce network hops and offering a better integration with Apache Kafka for the Broker and Trigger API model. Within the clients Docker container, localhost is itself its not the localhost that we think of our laptop, the Docker host, being. What could happen is that your producer is trying to find out who is the leader for a given partition, figures out its advertised.host.name and advertised.port and tries to connect. I am using docker-compose to build the Kafka container using wurstmeister/kafka image. I want to create custom healthceck for kafka brocker, but i can't use KafkaAdmin (by permissoin questions). why 10.127.96.151 ? hence we are getting the same error. Navigate to the Messaging Services installation path. Run Zookeeper If we try to connect our client to it locally, it fails: Ah, but above we were using a private Docker network for the containers, and weve not opened up any port for access from the host machine. please check my question here: Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. But I had found solution. Is there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? @adrian-moisa podman supports running docker-compose files and we have a lot of examples available. What is weird is that the broker does initialise as if it was the leader. I called the refreshBrokerMetadata after consumer error privacy statement. If compressed data is necessary, compressing your data before sending it to the brokers and decompressing after receiving is a valid . Have a question about this project? If we change advertised.listener back to localhost now, the Kafka broker wont work except for connections from the host. Are there any apis we can call on the client itself when it gets into this situation that can help expedite recovery? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Kafka broker may not be available exception, Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. One of the reasons that might be broken is the keystore and truststore. If then also nothing works out, then go for, #listeners=PLAINTEXT://:9092 If the bootstrap server does not contain the latest metadata about the topic (for example, when it lost its zookeeper claim). to your account. Node version: 8.9.4; Kafka-node version: 5.0.0; Kafka version: 1.1.0; For specific cases also provide. Questions? In my case found that I didn't started the zookeeper and kafka server. We know Kafka was fine, some nodes were not affected, we know that affected nodejs process started working once we restated them. If youre running Docker on the Mac, theres a hacky workaround to use host.docker.internal as the address on which the host machine can be accessed from within the container: So the container can see the hosts 9092 port. In this example, my client is running on my laptop, connecting to Kafka running on another machine on my LAN called asgard03: The initial connection succeeds. With Docker using docker-compose setting the name of the service inside KAFKA_ADVERTISED_HOST_NAME wont work unless you set the hostname as well. I'm getting leader ./bin/kafka-topics.sh --zookeeper :2181 --describe --topic yourTopicName but while sending message to producer it keeps throws error LEADER_NOT_AVAILABLE. Its running in a container on your laptop. I have gave the delay of 5 seconds before calling to createtopic method, however no luck found. Yes the kafka auto-creates the topic. privacy statement. How to Fix Apache Kafka Error, "NoBrokersAvailable" - Pandio You can validate the settings in use by checking the broker log file: Yes, you need to be able to reach the broker on the host and port you provide in your initial bootstrap connection. Stuck for like 3 hours trying to figure out what's wrong), I did same thing but it is not working for me. First story of aliens pretending to be humans especially a "human" family (like Coneheads) that is trying to fit in, maybe for a long time? Note: we are running zookeeper outside of the mock-api-pod. I'll list all the docker commands I've used to get a local one node setup running. And KAFKA_ADVERTISED_HOST_NAME was set to 'kafka'. Possibly the Kafka producer is trying to identify the leader for a given partition . Did you find anything? There are more than a couple of solutions for this error, and the way you solve it is going to boil down to the initial nature of what caused the error to occur in the first place. If the nuts and bolts of the protocol are the last thing youre interested in and you just want to write applications with Kafka you should check out Confluent Cloud. Errors that mention a message-format version (for example, The message format version on the broker does not support the request.) Save 25% or More on Your Kafka Costs | Take the Confluent Cost Savings Challenge. Everything after worked in one go. Data Fabric: A Comprehensive Guide for Technical Professionals on the Key Components of Data Fabric and its Potential Impact on Data Accessibility, Agility and Analytics, Trino! Kafka GUI to your account, Today we saw a steady stream of errors for a sustained period of time (45min) on some of the nodejs processes in our service generated the following errors, Client Error handler: It seems to me that these errors are result of some syncrhonization process between zookeeper and kafka during broker startup, because after some time procuder succesfully resent my messages. Negative R2 on Simple Linear Regression (with intercept). This list is what the client then uses for all subsequent connections to produce or consume data. Publishing messages using the command-line-producer works from within the kafka-node, so kafka itself appears to be working. Access, Automate, and Learn with AI Orchestration, 302 Washington St 150 STE 16517, San Diego, CA 92103. BrokerNotAvailableError: Broker not available (loadMetadataForTopics), Error from producer.send() Kafka vs RabbitMQ - A Head-to-Head Comparison for 2023 - ProjectPro It starts off wellwe can connect! Find centralized, trusted content and collaborate around the technologies you use most. However, just like any platform, framework, or software in circulation, it comes with its fair share of errors. Run Kafka In production we will have more instances. , In case you want to claim this issue, please comment down below! Connect to Apache Kafka Running in Docker | Baeldung Two attempts of an if with an "and" are failing: if [ ] -a [ ] , if [[ && ]] Why? Elegant way to write a system of ODEs with a Matrix, Enabling a user to revert a hacked change in their email. Next steps Note that advertised.listeners is the important property that will help you solve the issue. So, for example, when you ask code in a Docker container to connect to localhost, it will be connecting to itself and not the host machine on which you are running it. Listeners are nothing but hostname or IP, port and protocol combination. What control inputs to make if a wing falls off? All big infrastructures can falter under the smallest of human errors. Maybe that's your problem. Please Help! This returns metadata to the client, including a list of all the brokers in the cluster and their connection endpoints. Not the answer you're looking for? So, for example, running ping kafka inside 'kafka' container would fail with ping: bad address 'kafka'. If you have enabled name resolution through a custom DNS server, replace the kafka_broker entries with the FQDN of the worker nodes. process.on('uncaughtException', function (err) { I set on a ubuntu node of a cluster a kafka 0.11.0.0 instance. In prod this needs to be auth. - Idriss Neumann Jun 21, 2018 at 20:52 To subscribe to this RSS feed, copy and paste this URL into your RSS reader. And you should treat the message as any other WARN. Kafka vs. RabbitMQ -Source language . Solution 1 uncomment this line listeners=PLAINTEXT://:9092 changed this to listeners=PLAINTEXT://127.0.0.1:9092 Solution 2 I also had the same issue. The No Brokers Available error is a result of a faulty connection, and that might be caused by lackluster authentication by the server. My consumers won't do it. Double check that md5 of private key, certificate matches and that certificate can be verified with your truststore. same error for me as well. Well outline what it is and what causes it and provide detailed information on how you can combat this error, solve it, and prevent it from happening again. All configurations are done properly but when I try to produce message from console I keep getting the following error WARN Error while fetching metadata with correlation id 39 : {4-3-16-topic1=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient) Kafka version: 2.11-0.9.0.0 apache-kafka producer Share In terms of Docker this problem gets solved by specifying hostname for the container. Is there a place where adultery is a crime? And after I restart my consumers new messages can be received but the message that caused the topic creation is lost. I have been witnessing this same issue in the last 2 weeks while working with Kafka and have been reading this Stackoverflow's post ever since. Have a question about this project? When I encountered the error, I remember to have used PLAINTEXT://: in the list of bootstrap servers (or broker list) and it worked, strangely. Should I service / replace / do nothing to my spokes which have done about 21000km before the next longer trip? I can create topic with: kafka-topics.bat --create --topic quickstart-events --bootstrap-server localhost:9092. So how do we juggle connections both within and external to Docker? The guy who raised the issue, seemed to resolve it using some zookeeper config. To fix it? Adding KAFKA_ADVERTISED_PORT: 9092 property to my docker-compose file solved this error for me. This is exactly what we told it to do in the previous section, when we were fixing it to work with clients running within the Docker network. Try using kafka.KafkaClient() instead of kafka.client(). Apache, Apache Pulsar, Apache BookKeeper, and Apache Zookeeper are trademarks of the Apache Software Foundation. However if these settings are not configured correctly it then may think that the leader is unavailable. Why are radicals so intolerant of slight deviations in doctrine? Otherwise, it will use the value returned from java.net.InetAddress.getCanonicalHostName(). At least this one worked for me. The broker returns metadata, which includes the host and port on which all the brokers in the cluster can be reached. Sometimes I have. So i think you should check what's port kafka server used.This error when port is not esestablished or you connect wrong ip. Sometimes, the authentication doesnt bind with the network you want it to, so youll have to set it manually. Lets take the example we finished up with above, in which Kafka is running in Docker via Docker Compose. Hostname and port the broker will advertise to producers and consumers. Can you be arrested for not paying a vendor like a taxi driver or gas station? kafka connect error in confluent 7.4.0 but not confluent 6.2.6 It is not important! Troubleshoot issues with Azure Event Hubs for Apache Kafka - Azure I'll bookmark the page for more references. Check your bootstrap servers that you have given to the producer to fetch the metadata. I couldn't thank you much! If you are using Spring Boot, please see if the below property is set in application.properties file, assuming a producer application only: Otherwise, the following should work in general: I didnt have to change listeners in the server.properties file, as others have proposed. I know about docker compose. It usually occurs when you try to connect locally to Kafka through the Python client on CentOS, but it might occur if you use different connections as well. In server.properties config I have lines: Zookeeper is running, Kafka is running. And if were honest, this probably makes sense. a "localhost" in KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS property points at container's localhost, not your host machine one. All configurations are done properly but when I try to produce message from console I keep getting the following error. Now, just like with any other piece of framework, it isnt without its errors, and even if youre a seasoned Apache Kafka user, youll encounter some of them at one point or the other. I believe something is up with zookeeper. We also need to specify KAFKA_LISTENER_SECURITY_PROTOCOL_MAP. Outside of work he enjoys drinking good beer and eating fried breakfasts, although generally not at the same time. Both kafka and kafka-ui are in containers. Knowing and Valuing Apache Kafka's ISR (In-Sync Replicas) Much better is to use Docker Compose.Shut down the Docker containers from above first (docker rm -f broker; docker rm -f zookeeper) and then create docker-compose.yml locally using this example. Thanks for contributing an answer to Stack Overflow! Before we answer that, lets consider why we might want to do this. I was setting up large cluster and somewhere in the bureaucracy chain made a mistake so one of the certificates have not matched CSR. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I have one zookeper and one kafka broker node. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. but if I change the docker image to cp-kafka-connect v7.4.0 I start getting errors like: "Request joining group due to: rebalance failed due to 'The group member needs to have a valid member id before actually entering a consumer group . See this other stack overflow for more about setting up AdminUtils. What solved it for me is to set listeners like so: This makes KAFKA broker listen to all interfaces. First thing first, you need to check if the Kafka Broker Host & Ip used in the "bootstrap_servers" are correct . There are two reasons youll be in this state: For the latter scenario, you need to refer above to the client and Kafka on different machines and make sure that (a) the brokers advertise their correct listener details and (b) the container can correctly resolve these host addresses. In my brokers server.properties, I take this: And change the advertised.listeners configuration thus: The listener itself remains unchanged (it binds to all available NICs, on port 9092). Ensure and Add all your Kafka bootstrap servers in the server.properties file - As stated above, there could be many reasons why youve encountered the No Brokers Available error. Since I wanted my kafka broker to connect with remote producers and consumers, So I don't want advertised.listener to be commented out. Why are radicals so intolerant of slight deviations in doctrine? Try this listeners=PLAINTEXT://localhost:9092 I am trying to use Kafka. to connect and was not able to find the host. PS:I run this on same machine. At times, the root issue can be something as simple as an additional space or a missing space, or a faulty character. If youre looking for a more in-depth solution, youll have to dig a bit deeper. The default path is C:\Program Files (x86)\MicroStrategy\Messaging Services\tmp. Connection to node -1 could not be established. Broker may not be So, I run docker desktop container: But there's no connection and I'm getting error: The text was updated successfully, but these errors were encountered: Thank you and congratulations for opening your very first issue in this project! Is Spider-Man the only Marvel character that has been represented as multiple non-human characters? I'm trying to connect from one docker-container running node to another container running Kafka, and I can't seem to get through to send a message. In that case, we use AdminUtils in our test setup to check if the topic exists and create it if not. When we were starting the Kafka cluster, it was using by default. Making statements based on opinion; back them up with references or personal experience. Ordered delivery of events based on CloudEvents partitioning extension. Notice that we are creating volumes for one zookeeper instance. Why does bunched up aluminum foil become so extremely hard to compress? it uses the value for "listeners" if configured, If the following line is not there, then add it to the end of the, The topic might not have been created. However, while this is the most common solution to this problem, it doesnt always work. hence we are getting the same error. How to check if Kafka Broker (or is conusumer connect to broker) is alive by other way? The below properties go in server.properties file on each Kafka broker. Overview Apache Kafka is a very popular event streaming platform that is used with Docker frequently. @Chris While trying this, I am getting the error - Got user-level KeeperException when processing sessionid:************* type:setData cxid:0xdb zxid:0x55 txntype:-1 reqpath:n/a Error Path:/config/topics/__consumer_offsets Error:KeeperErrorCode = NoNode for /config/topics/__consumer_offsets.. Could you please help on this. I do not really know why that is the case, but at least there is a workaround. // Multiple Error Events may fire, only set one connection retry. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. but at aws msk it is not getting connected and giving error "Broker may not be available" I have set bootstrap.servers : we need to map broker url ,b1-xyz:9094,b2-xyz:9094,b3-xyz:9094 right?need to add zookeeper url also? Number of Brokers: 20; Number partitions for topic: 20; Include Sample Code to reproduce behavior Setting this to my IP address instead of the AWS generated public host name resolved many issues I was having. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I have gave the delay of 5 seconds before calling to createtopic method, however no luck found. Kafka - Connection to node -1 (localhost/127.0.0.1:2181) could not be established. Kafka command port "bin/kafka-console-producer.sh --broker-list localhost:9092 --topic TopicName" . Actually I was checking kafka fault tolerance by killing first node manually on my local multi node cluster. rev2023.6.2.43473. Well occasionally send you account related emails. The text was updated successfully, but these errors were encountered: Any updates on this? It has what appears to itself as its own hostname, its own network address, its own filesystem. PLAINTEXT KAFKA_INTER_BROKER_LISTENER_NAME: INTERNAL ES_JAVA_OPTS: "-Xms512m -Xmx3000m" and Producer .

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