Data Engineering Minds
Data Engineering Minds
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Java - Getting Started | What is public static void main | Java Coding in Thamizh - Part 01
Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :)
-------------------- Connect with me --------------------
Bio - bio.link/vinodclv
Twitter - vintechie​
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𝐃𝐄𝐒𝐂𝐑𝐈𝐏𝐓𝐈𝐎𝐍:
This is the 1st part of my Java series in Thamizh language. In this video, you will learn the following topics that you need to be know as a first step in your Java programming journey:
1. Installation of Java 21 on your system
2. How to set JAVA_HOME and PATH variables
3. List of software that comes with JDK
4. Setting up your code editor to write Java programs
5. Java Hello World Example
6. Explanation of basic syntax of Java
7. Naming conventions for Java Classes
8. How a Java program is executed in the background
9. What is the role of Java compiler, Java virtual machine and CPU when you execute your Java program
10. What is public static void main in detail
11. Types of imports in Java - single-type import & on-demand import
𝐔𝐬𝐞𝐟𝐮𝐥 𝐋𝐢𝐧𝐤𝐬
1. Download JDK for Java 21 - www.oracle.com/in/java/technologies/downloads/
2. Download Intellij Idea for free (community version) - www.jetbrains.com/idea/download/
3. System class in Java - docs.oracle.com/javase/8/docs/api/java/lang/System.html
4. PrintStream class in Java - docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html
Thanks for watching !!
நன்றி _/\_
#java #javatamil #javaprogramming
0:00 Agenda
1:49 Install Java 21
2:43 Set JAVA_HOME & PATH
5:36 What comes with JDK?
9:34 Setup IDEA for writing Java code
10:24 Java basic syntax - Hello World example
23:07 How Java code is executed in the background
26:21 Compile - javac & Run - JVM
28:39 String[] args in Java main()
31:44 javap on high-level
34:02 public static void main() in detail
56:58 What is import in Java?
1:06:36 Summary of the video
Переглядів: 129

Відео

Python and PostgreSQL App using Docker Compose
Переглядів 3,3 тис.Рік тому
Connect with me Bio - bio.link/vinodclv Please support my Effort - www.buymeacoffee.com/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium - medium.com/@vinod.chelladuraiv Twitter - vintechie​ Linkedin - www.linkedin.com/in/vinod-chelladurai-v/ Quora Space - www.quora.com/q/dataengineeringminds 𝐃𝐄𝐒𝐂𝐑𝐈𝐏𝐓𝐈𝐎𝐍: In this video, I have explained a de...
Kafka without Zookeeper | Kraft | KIP-500 | Apache Kafka Series - Part 09
Переглядів 5 тис.Рік тому
For serverless Kafka solutions, please check below: 1. sovrn.co/1ebjyv7 2. sovrn.co/1gc3rjz Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium...
Deploying Prometheus and Grafana in Kubernetes | Observability | Prometheus | Grafana | NodeExporter
Переглядів 1,8 тис.Рік тому
Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium - medium.com/@vinod.chelladuraiv Twitter - vintechie​ Linkedin - www.linkedin.com/in/vinod-chelladurai-v/ Quora Space - www.quora.com/q/dataengineeringminds Code components used in this video can be found here - github.com/vinclv/data-engineering-minds-kubernetes...
Kafka Summit London 2022
Переглядів 8792 роки тому
A short footage recorded during the Kafka Summit in London on April 25 and April 26, 2022. #kafkasummit #apachekafka #kafka
Apache Kafka Producer - Python | Confluent Kafka Python | SASL_SSL | Apache Kafka Series - Part 08
Переглядів 13 тис.3 роки тому
For serverless Kafka solutions, please check below: 1. sovrn.co/1ebjyv7 2. sovrn.co/1gc3rjz Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium...
Apache Kafka Producer API Explained | Apache Kafka Series - Part 07
Переглядів 3 тис.3 роки тому
𝐏𝐋𝐄𝐀𝐒𝐄 𝐍𝐎𝐓𝐄: 𝐈 𝐞𝐱𝐩𝐥𝐚𝐢𝐧𝐞𝐝 𝐀𝐂𝐊 𝐯𝐚𝐥𝐮𝐞𝐬 (𝐚𝐭 18:58) 𝐰𝐫𝐨𝐧𝐠𝐥𝐲 𝐚𝐧𝐝 𝐈 𝐚𝐦 𝐞𝐱𝐭𝐫𝐞𝐦𝐞𝐥𝐲 𝐬𝐨𝐫𝐫𝐲 𝐟𝐨𝐫 𝐭𝐡𝐚𝐭. 𝐓𝐡𝐞 𝐩𝐨𝐬𝐬𝐢𝐛𝐥𝐞 𝐯𝐚𝐥𝐮𝐞𝐬 𝐨𝐟 𝐀𝐂𝐊 𝐯𝐚𝐥𝐮𝐞𝐬 𝐚𝐫𝐞: 𝟎 - 𝐏𝐫𝐨𝐝𝐮𝐜𝐞𝐫 𝐝𝐨𝐞𝐬 𝐧𝐨𝐭 𝐰𝐚𝐢𝐭 𝐟𝐨𝐫 𝐚𝐧𝐲 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐝𝐞𝐥𝐢𝐯𝐞𝐫𝐲 𝐚𝐜𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞𝐦𝐞𝐧𝐭𝐬 𝟏 - 𝐏𝐫𝐨𝐝𝐮𝐜𝐞𝐫 𝐰𝐚𝐢𝐭𝐬 𝐨𝐧𝐥𝐲 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐚𝐜𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞𝐦𝐞𝐧𝐭 𝐟𝐫𝐨𝐦 𝐭𝐡𝐞 𝐥𝐞𝐚𝐝𝐞𝐫 𝐩𝐚𝐫𝐭𝐢𝐭𝐢𝐨𝐧 -𝟏 𝐨𝐫 𝐚𝐥𝐥 - 𝐏𝐫𝐨𝐝𝐮𝐜𝐞𝐫 𝐰𝐚𝐢𝐭𝐬 𝐮𝐧𝐭𝐢𝐥 𝐭𝐡𝐞 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐢𝐬 𝐰𝐫𝐢𝐭𝐭𝐞𝐧 𝐭𝐨 𝐚𝐥𝐥 𝐭𝐡𝐞 𝐫𝐞𝐩𝐥𝐢𝐜𝐚𝐬 (𝐨𝐫 𝐭𝐨 𝐚𝐬 𝐦𝐚𝐧𝐲 𝐫𝐞𝐩𝐥𝐢𝐜𝐚𝐬 𝐚𝐬 𝐬𝐩𝐞𝐜𝐢𝐟𝐢𝐞𝐝 𝐢𝐧 𝐦𝐢𝐧.𝐢𝐧𝐬𝐲𝐧...
kafka-consumer-groups.sh & KIP-635 | Apache Kafka Series - Part 06
Переглядів 3,6 тис.3 роки тому
Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium - medium.com/@vinod.chelladuraiv Twitter - vintechie​ Linkedin - www.linkedin.c...
Kafka SASL Authentication & Authorization | SASL/SCRAM | Kafka ACLs | Apache Kafka Series - Part 05
Переглядів 34 тис.4 роки тому
For serverless Kafka solutions, please check below: 1. sovrn.co/1ebjyv7 2. sovrn.co/1gc3rjz Please check my pinned comment after watching the video. ©𝐃𝐚𝐭𝐚 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐌𝐢𝐧𝐝𝐬. 𝑅𝑒-𝑑𝑖𝑠𝑡𝑟𝑖𝑏𝑢𝑡𝑖𝑜𝑛 𝑜𝑓 𝑡ℎ𝑖𝑠 𝑣𝑖𝑑𝑒𝑜 𝑜𝑛 𝑎𝑛𝑦 𝑜𝑡ℎ𝑒𝑟 𝑝𝑙𝑎𝑡𝑓𝑜𝑟𝑚 𝑖𝑠 ℎ𝑖𝑔ℎ𝑙𝑦 𝑝𝑟𝑜ℎ𝑖𝑏𝑖𝑡𝑒𝑑. Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee....
Kafka SSL Configuration | Zookeeper Security | Kafka Security | Apache Kafka Series - Part 04
Переглядів 40 тис.4 роки тому
For serverless Kafka solutions, please check below: 1. sovrn.co/1ebjyv7 2. sovrn.co/1gc3rjz 𝑅𝑒-𝑑𝑖𝑠𝑡𝑟𝑖𝑏𝑢𝑡𝑖𝑜𝑛 𝑜𝑓 𝑡ℎ𝑖𝑠 𝑣𝑖𝑑𝑒𝑜 𝑜𝑛 𝑎𝑛𝑦 𝑜𝑡ℎ𝑒𝑟 𝑝𝑙𝑎𝑡𝑓𝑜𝑟𝑚 𝑖𝑠 ℎ𝑖𝑔ℎ𝑙𝑦 𝑝𝑟𝑜ℎ𝑖𝑏𝑖𝑡𝑒𝑑. Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagr...
What is SSL security in Apache Kafka? | Apache Kafka Series - Part 03
Переглядів 15 тис.4 роки тому
For serverless Kafka solutions, please check below: 1. sovrn.co/1ebjyv7 2. sovrn.co/1gc3rjz Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium...
How to launch a Kafka Cluster | Kafka Topics | Kafka Clients | Apache Kafka Series - Part 02
Переглядів 12 тис.4 роки тому
For serverless Kafka solutions, please check below: 1. sovrn.co/1ebjyv7 2. sovrn.co/1gc3rjz Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium...
Apache Kafka - Introduction & Architecture | Apache Kafka Series - Part 01
Переглядів 22 тис.4 роки тому
For serverless Kafka solutions, Check here - sovrn.co/1ebjyv7 Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Instagram - dataengineeringminds GitHub - github.com/vinclv Medium - medium.com/@vinod.chelladur...
Apache Kafka Tamizh - Part 05 | Kafka SASL Authentication & Authorization
Переглядів 3,4 тис.4 роки тому
Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Medium - medium.com/@vinod.chelladuraiv GitHub - github.com/vinclv Twitter - vintechie​ Linkedin - www.linkedin.com/in/vinod-chelladurai-v/ Quora Space - www.quo...
Apache Kafka Tamizh - Part 04 | Kafka SSL Configuration
Переглядів 4,5 тис.4 роки тому
Hi Folks, if you find my contents useful to your professional career and would like to support my effort, please buy me a coffee at www.buymeacoffee.com/vinodclv. Thanks in advance :) Connect with me Bio - bio.link/vinodclv Medium - medium.com/@vinod.chelladuraiv GitHub - github.com/vinclv Twitter - vintechie​ Linkedin - www.linkedin.com/in/vinod-chelladurai-v/ Quora Space - www.quo...
Apache Kafka Tamizh - Part 03 | What is SSL security in Apache Kafka?
Переглядів 2,8 тис.4 роки тому
Apache Kafka Tamizh - Part 03 | What is SSL security in Apache Kafka?
Apache Kafka Tamizh - Part 02 | How to setup a Kafka Cluster locally
Переглядів 5 тис.4 роки тому
Apache Kafka Tamizh - Part 02 | How to setup a Kafka Cluster locally
Apache Kafka Tamizh - Part 01 | An Introduction to Apache Kafka
Переглядів 16 тис.4 роки тому
Apache Kafka Tamizh - Part 01 | An Introduction to Apache Kafka
How to post to Twitter using Python (without Tweepy)
Переглядів 1,2 тис.7 років тому
How to post to Twitter using Python (without Tweepy)

КОМЕНТАРІ

  • @Ckbagchi
    @Ckbagchi День тому

    I am planing for Kafka certification and just went through the series, it's really amazing the way you have explained that how it works under the hood.

  • @kirankota4429
    @kirankota4429 5 днів тому

    If I have original certificate I just need to create keystore and truststore right if then where can I find ca certificate

  • @kirill_morozov_
    @kirill_morozov_ 8 днів тому

    guys, what if i configure kafka ssl with several servers with different ips? what can i use in dns and cn? localhost? i almost cry searching the answer

  • @Ckbagchi
    @Ckbagchi 8 днів тому

    Really happy with the way u have explained SSL implementation in Kafka with practicals. Keep doing good works!

  • @Ckbagchi
    @Ckbagchi 11 днів тому

    Nice explanation for SSL.

  • @nihar1213
    @nihar1213 Місяць тому

    Client authenticates with Server. CA is an authority who contains its own certificate and a key to sign the certificate of client and server For mutual TLS server and client both should have a private key and certificate pair To generate - Create a private key for server and then create certificate singeing request to CA the authority . It gives a certificate signed backed to the server . Now server has its own private key and certificate. The certificate has details and a public key by which the client can validate the server The above procedure is also same while doing it for client Now server and client both have a pair of their own certificate and private key Now when the communication happens between them they also contain the authority certificate using which their own certificates were signed and created. This just make sure server and client can validate each other s certificates by a trusted source . It is like in an Indian marriage both parties talk to their common friend to make sure the bride and groom are legit . That is before the marriage Now both server and client both should have 1. Own certificate which also has public key 2. Private key 3. Authority or issuer certificate Done.

  • @ashwenkumar
    @ashwenkumar 3 місяці тому

    Bro please use black putty screen onumae terila in white

  • @jitheshpacha
    @jitheshpacha 3 місяці тому

    Excellent video. Whatever you explain its crystal clear and you go to the core. If some things are not covered I see you will make videos for the same (explain properties, version upgrade etc). Awaiting for those videos as well. Keep up the excellent job. Fantastic videos and no doubt about it

  • @ashwenkumar
    @ashwenkumar 3 місяці тому

    Bro very detailed explanation bro .. keep it up

  • @kamalpant_kp
    @kamalpant_kp 5 місяців тому

    Very Good Explanation and Example is relatable.

  • @prithvirajan105
    @prithvirajan105 5 місяців тому

    Thank you..

  • @shashanktripathi3034
    @shashanktripathi3034 5 місяців тому

    how come this video has only 48 comments, man this was really helpful , thanks alot

  • @mahalakshmimuthaiah1514
    @mahalakshmimuthaiah1514 5 місяців тому

    Thanks anna, very useful to study

  • @GopalVenkatesan
    @GopalVenkatesan 6 місяців тому

    மிகச் சிறப்பான முறையில் தெளிவு படுத்தியுள்ளீர். நன்றி 🙏🏽

  • @Surjith-mr2sn
    @Surjith-mr2sn 6 місяців тому

    Could you kindly upload the video of migrating old zk based kafka to kraft mode [want to migrate the old meta data's to current kraft mode]

  • @venomfate
    @venomfate 6 місяців тому

    Super super ❤ you .

  • @prasanthkumar3827
    @prasanthkumar3827 6 місяців тому

    great content and nicely explained thank you sir.

  • @sameersarmah1446
    @sameersarmah1446 6 місяців тому

    Fantastic video. Immensely detailed and comprehensive.

  • @mayankjoshi9275
    @mayankjoshi9275 7 місяців тому

    I have followed the tutorial and is able to configure the sasl ssl in my system. If i want to use it via public ip address so that other system can use it ehat do i have to do . Could you help regarding this

  • @viveksagarpandey6627
    @viveksagarpandey6627 7 місяців тому

    Thank you ❤

  • @kentnar2652
    @kentnar2652 7 місяців тому

    At 16:09 how were you able to execute zookeeper-server-start.sh from within the config folder when it is clearly within the bin folder?

  • @harshavardhanreddy9877
    @harshavardhanreddy9877 7 місяців тому

    Pls share vedio on mirror maker

  • @harshavardhanreddy9877
    @harshavardhanreddy9877 7 місяців тому

    Pls share new video's

  • @saikrishnachundi7202
    @saikrishnachundi7202 8 місяців тому

    hello @vinod I am grateful for you for the kafka knowledge. Nice explanation which I cannot find in any blogs. I hope you do the different security configs videos same as you have done before for normal kafka cluster for the Kraft clusters. waiting for those videos , I have tried my hand but could not apply the scram-sha-512 mechanism between B2B, B2C and C2C. C-controller, B-broker. I was able to do SASL_plaintext with scram to the clients with scram-sha-512 though. But I want to make whole cluster which communicates itself internally and externally to clients using the sasl_plaintext and using scram-sha-512 Thanks for the videos though

  • @AomineDaici
    @AomineDaici 8 місяців тому

    When I type postgres into hostname, I get the error "unable to connect to server: connection is bad: name does not resolve". When I find the IP address of the Postgres image with Docker Inspect and write it, I get the error "unable to connect to server: connection timeout expired"

  • @profferofficial2162
    @profferofficial2162 8 місяців тому

    want to perform SASL Plaintext on my 3 node kafka cluster running on ubuntu..can you help/guide..i am in need

  • @Beautyissimple579
    @Beautyissimple579 8 місяців тому

    i wanted to add a csv file to postgres and jus replaced a code with you but i got error of FATAL: password authentication failed for user . I checked the password but its correct in python code

  • @Beautyissimple579
    @Beautyissimple579 8 місяців тому

    how fantastic is this tutorial. thank you so much.

  • @naganaga9426
    @naganaga9426 9 місяців тому

    Need english subtitles

  • @shamstabrez2986
    @shamstabrez2986 9 місяців тому

    where r the remaing sessions here only 3 videos available

  • @akshaykadam1260
    @akshaykadam1260 9 місяців тому

    it was very informative session. Thanks for making this. You are really Doing great work.

  • @babupachiyappan3163
    @babupachiyappan3163 10 місяців тому

    After watching couple of video came here, the flow and way of explanation is excellent, can't be better then this.

    • @DataEngineeringMinds
      @DataEngineeringMinds 10 місяців тому

      Thanks for your support 🙏 Please subscribe to the channel 😊

  • @aprilianidiar
    @aprilianidiar 10 місяців тому

    Thank you! Your tutorial is answering my hindrances while doing it for Django. Your explanation is very clear!

    • @DataEngineeringMinds
      @DataEngineeringMinds 10 місяців тому

      Thank you very much for your support. Much appreciated 🙏

  • @ashfann.m2399
    @ashfann.m2399 10 місяців тому

    samma explanation... Thanks bro

  • @ashfann.m2399
    @ashfann.m2399 10 місяців тому

    THank you very much for this!

    • @DataEngineeringMinds
      @DataEngineeringMinds 10 місяців тому

      Thanks for your support. Please help me spread this channel 😊🙏

  • @akashshelke5330
    @akashshelke5330 10 місяців тому

    When will be Kafka without zk (KRaft) production deployment video will be published

  • @anamsmit
    @anamsmit 11 місяців тому

    "Error while executing topic command : The AdminClient thread has exited. Call: createTopics" I'm getting this error while creating topic , can you please help me with this, all the properties file are same as you showed in the video

  • @DivyaShree-z3m
    @DivyaShree-z3m 11 місяців тому

    hi my zookeeper version is 3.4.10 can i implement ssl ?

  • @ashokit1225
    @ashokit1225 11 місяців тому

    Excellent explanation..

  • @almirbolduan
    @almirbolduan 11 місяців тому

    Awesome video Mr. Vinod!! Thanks for sharing all this knowledge. 😃

  • @shamstabrez2986
    @shamstabrez2986 Рік тому

    is this series still valid for 2024 bcoz its already been 3years that u have uploaded this

    • @DataEngineeringMinds
      @DataEngineeringMinds Рік тому

      Yes. It is still valid if You want to use Kafka with Zookeeper. Tha major change as of 2023/24 is removal of Zookeeper (we call it Kraft). I also uploaded a video for that. So, if u watch this one followed by that video, u will get a proper undetrstanding of the latest version

    • @shamstabrez2986
      @shamstabrez2986 6 місяців тому

      @@DataEngineeringMinds thnx for ur reply and what are the new things comes in apache kafka which u didnt teach in ur sessions

  • @satishsharma-mj6zh
    @satishsharma-mj6zh Рік тому

    Amazing

  • @DennisMartin-y3n
    @DennisMartin-y3n Рік тому

    you are great i love your teaching

  • @sreeharshagarimella1593
    @sreeharshagarimella1593 Рік тому

    I am using Amazon msk, my consumer consumes messages and suddenly in between I get error " not Authorization to access topic" or " not authorised to access join consumer group". This seems wierd, it works and suddenly gives these errors randomly.

  • @ITHoc-tt6yc
    @ITHoc-tt6yc Рік тому

    Turn on the translated subtitles on you

  • @nandhakumar2568
    @nandhakumar2568 Рік тому

    bro, sema explanation 🥳, can you cover with confluent Kafka if possible? other confluent ops like Schema Registry, KSQL DB, Kafka connectors...Your videos would be a great start.

    • @DataEngineeringMinds
      @DataEngineeringMinds Рік тому

      Thanks bro. Yes, they are on track very soon. Please help spreading the channel 🙏

  • @vanelnara6761
    @vanelnara6761 Рік тому

    i got this error after putting SSL command [2023-10-22 02:43:35,485] ERROR Uncaught exception in thread 'kafka-producer-network-thread | console-producer': (org.apache.kafka.common.utils.KafkaThread) java.lang.OutOfMemoryError: Java heap space at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57) at java.nio.ByteBuffer.allocate(ByteBuffer.java:335) at org.apache.kafka.common.memory.MemoryPool$1.tryAllocate(MemoryPool.java:30) at org.apache.kafka.common.network.NetworkReceive.readFrom(NetworkReceive.java:102) at org.apache.kafka.common.network.KafkaChannel.receive(KafkaChannel.java:452) at org.apache.kafka.common.network.KafkaChannel.read(KafkaChannel.java:402) at org.apache.kafka.common.network.Selector.attemptRead(Selector.java:674) at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:576) at org.apache.kafka.common.network.Selector.poll(Selector.java:481) at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:571) at org.apache.kafka.clients.NetworkClientUtils.awaitReady(NetworkClientUtils.java:73) at org.apache.kafka.clients.producer.internals.Sender.awaitNodeReady(Sender.java:564) at org.apache.kafka.clients.producer.internals.Sender.maybeSendAndPollTransactionalRequest(Sender.java:485) at org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:332) at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:247) at java.lang.Thread.run(Thread.java:750)