question Re: No brokers found in ZK in Archives of Support Questions (Read Only)

No brokers found in ZK

silaphetmounkhaty-3293181 — Fri, 16 Sep 2022 10:20:17 GMT

Hi,

I'm testing Kafka sending messages by running below commands from seperate terminals.

bin/kafka-console-producer --broker-list localhost:9092 --topic kafkatest

This is a message

This is another message

On another terminal:

bin/kafka-console-consumer --zookeeper localhost:2181 --topic kafkatest --from-beginning

No brokers found in ZK.

Why the above messages don't show up on consumer terminal? This is CDH5.5.2 with Parcel deployment.

What am I missing on CDH/CM configurations?

Thanks very much,

Silaphet

Re: No brokers found in ZK

pdvorak — Thu, 19 May 2016 18:01:19 GMT

What is the value of your "ZooKeeper Root" set to in the kafka service configuration?
If it is set to something like "/kafka", you'll need to specify that in your zk string:

bin/kafka-console-consumer --zookeeper localhost:2181 /kafka --topic kafkatest --from-beginning

What version of kafka parcel are you using?

-pd

Re: No brokers found in ZK

silaphetmounkhaty-3293181 — Wed, 25 May 2016 17:52:37 GMT

Hi,

Sorry for the delay. The "Zookeeper Root" is /kafa. I ran below command still no luck.

bin/kafka-console-consumer --zookeeper localhost:2181 /kafka --topic kafkatest --from-beginning

I tried FQN instead of localhost still no luck. Tried different Zookeeper node still the same. The Kafka version is

KAFKA-2.0.1-1.2.0.1.p0.5

Please let me if there is another option to try.

Thanks,
Silaphet

Re: No brokers found in ZK

pdvorak — Wed, 25 May 2016 20:41:52 GMT

Please confirm, there should be no space between localhost:2181 and /kafka. The zk option should be:
--zookeeper localhost:2181/kafka

My apologies, it appears I had a typo in my original recommendation.

-pd

Re: No brokers found in ZK

silaphetmounkhaty-3293181 — Wed, 25 May 2016 21:06:49 GMT

Hi Pd,

Yes, extra space was the root cause. Thanks very much for great trick.

Thanks,

Silaphet

Re: No brokers found in ZK

Yuexin Zhang — Thu, 26 May 2016 03:52:19 GMT

Hi,
Are you using CM 5.5.2?

To use Cloudera Kafka 2.x , you have to have CM 5.5.3 or above:
http://www.cloudera.com/documentation/kafka/latest/topics/kafka_requirements.html

I do see others encountering different kind of issues when their Kafka 2.x
is deployed/managed by CM version <= 5.5.2 (unsupported).

Re: No brokers found in ZK

jack0188 — Tue, 22 Nov 2016 10:34:43 GMT

i came across this problem too.

I have zookeeper and kafka in seperate hosts.

i ran these commands:

bin/kafka-server-start.sh config/server.properties
bin/kafka-topics.sh --create --zookeeper server1:2181 --replication-factor 1 --partitions 1 --topic mobile_events

This has created topics in the kafka dir.

bin/kafka-console-producer.sh --broker-list server1:9092 --topic mobile_events.

This opens a terminal to type in the messages, but the messages are not being saved in the topics as i cheked the kafka data dir.

Finally,

bin/kafka-console-consumer.sh --zookeeper server1:2181 --topic mobile_events --from-beginning

Is throwing "No brokers fround in the ZK" log to the console.

Can you help me with fixing the issue.

Thanks in advance.

Re: No brokers found in ZK

pdvorak — Tue, 22 Nov 2016 16:26:23 GMT

What does the output of:

kafka-topics --describe --zookeeper server1:2181

show?

-pd

Re: No brokers found in ZK

jack0188 — Wed, 23 Nov 2016 13:25:42 GMT

hi,
I found the mistake . Thanks for being there for a fellow programmer

Re: No brokers found in ZK

jack0188 — Wed, 04 Jan 2017 07:52:38 GMT

i was pointinn to a wrong broker so the zk was unable to find the topics