java.lang.NoClassDefFoundError: Could not initialize class org.apache.kafka.clients.producer.ProducerConfig about jruby-kafka

[joekiller]

Are you building the gem yourself? Make sure you run rake install_jars

https://github.com/joekiller/jruby-kafka/blob/master/DEVELOPMENT.md

Hi Joe,

I'm running jruby 1.7.25 and using the 3.6.0 branch to be able to target
kafka 0.9 brokers. When constructing a Producer like:

KAFKA_PRODUCER_OPTIONS = {
:bootstrap_servers => '127.0.0.1:9092',
:key_serializer => 'org.apache.kafka.common.serialization.StringSerializer',
:value_serializer =>
'org.apache.kafka.common.serialization.StringSerializer',
}

producer = Kafka::KafkaProducer.new(KAFKA_PRODUCER_OPTIONS)

it fails with:
java.lang.NoClassDefFoundError: Could not initialize class
org.apache.kafka.clients.producer.ProducerConfig
org.apache.kafka.clients.producer.KafkaProducer.(org/apache/kafka/clients/producer/KafkaProducer.java:181)
...

From what I can see this has to do with dynamic class loading issues in
kafka 0.9.

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHub
#53, or mute the thread
https://github.com/notifications/unsubscribe/AA-bx2D0sqSb75u848GhDQbN5GbQ0JAmks5qVO9PgaJpZM4JLcn7
.

[sziep]

No, just wanted to give you a heads up that the latest kafka 0.9 (3.6.0) branch is not usable.
Going back to 2.2.2 fixed the issue for me. Surprisingly I can send messages to 0.9 brokers.

[joekiller]

Are you using the 3.6.0 gem or branch?

-Joe
Sent via mobile.
On Jul 13, 2016 11:31 AM, "Stephan Ziep" [email protected] wrote:

No, just wanted to give you a heads up that the latest kafka 0.9 (3.6.0)
branch is not usable.
Going back to 2.2.2 fixed the issue for me. Surprisingly I can send
messages to 0.9 brokers.

—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub
#53 (comment),
or mute the thread
https://github.com/notifications/unsubscribe/AA-bx3Cs2eJ8hNm7sRQflbG1CjlFADQAks5qVQTOgaJpZM4JLcn7
.

[joekiller]

Are your brokers in 0.8 compatibility mode? http://kafka.apache.org/090/documentation.html#upgrade

Upgraded brokers and clients are not compatible otherwise.

v3.6.0 passed all tests using Kafka 0.9.0.1 https://travis-ci.org/joekiller/jruby-kafka/builds/117786218

[sziep]

I was using the gems, not the branches directly.
My broker is not in compatibility mode, i just checked. Its 0.9 without special settings. Curious...

My setup has two docker containers. One is producing via a Sinatra App running on Jubillee / Vert.x, the other one is Kafka receiving messages.

[joekiller]

Okay any steps.to replicate would be appreciated.
On Jul 14, 2016 2:36 AM, "Stephan Ziep" [email protected] wrote:

I was using the gems, not the branches directly.
My broker is not in compatibility mode, i just checked. Its 0.9 without
special settings. Curious...

My setup has two docker containers. One is producing via a Sinatra App
running on Jubillee / Vert.x, the other one is Kafka receiving messages.

—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub
#53 (comment),
or mute the thread
https://github.com/notifications/unsubscribe/AA-bxz9SoqxShS3ljWZK1VWtY1laxdVRks5qVdjpgaJpZM4JLcn7
.