CODEWITHSUNDEEP
apache-kafkaapache-zookeeper
Andreas bleYel
Andreas bleYel

Reputation: 463

Classpath is empty. Please build the project first e.g. by running './gradlew jar -PscalaVersion=2.11.12'

I am not able to run a Apache Kafka service due to a failure while trying to start a Zookeeper instance. I have downloaded and tried it with all 3 availabe downloads at the official site. (binarys and source) When i try to start zookeeper with 

./bin/zookeeper-server-start.sh config/zookeeper.properties

I always get the same error message:

Classpath is empty. Please build the project first e.g. by running './gradlew jar -PscalaVersion=2.11.12'

The same goes for (after starting a seperate zookeeper (not the build-in from kakfa) instance)

./bin/kafka-server-start.sh config/server.properties

I have tried it under Ubuntu 17.04 and 18.04. When i try this on a virtual machine using Ubuntu 16.04 it works.

Unfortunatly, all i found regarding this problem, was for Windows. Thank you for any help.

Upvotes: 29

Views: 37083

Answers (9)

Dave
Dave

Reputation: 43

I have the same message when I try bin/kafka-topic.sh.

It's just because you have a space in the full path.

Go to the folder and execute "pwd", in the path, you must change the white space of folder by an underscore or use camel case.

Upvotes: 4

Dima Myroniuk
Dima Myroniuk

Reputation: 51

I had the same issue. I solved it when removed the white spases from my folder name e.g "Kafka binary" -> "Kafka_binary".

Upvotes: 5

YAO ALEX DIDIER AKOUA
YAO ALEX DIDIER AKOUA

Reputation: 249

I changed the path: 

~/Documents/Formation/Moi/Big Data/Logiciels/kafka_2.12-2.4.1

to 

~/Documents/Formation/Moi/Logiciels/kafka_binary

and it works (binary sources)

Upvotes: 2

Ferds
Ferds

Reputation: 35

Go to your terminal and run:

$ ./gradlew jar -PscalaVersion=2.11.12

Upvotes: 4

Amar
Amar

Reputation: 175

We need to download kafka-binary and not the source Download Binary from mirror http://mirrors.estointernet.in/apache/kafka/2.2.0/kafka_2.11-2.2.0.tgz

Upvotes: 15

Jacob Jin
Jacob Jin

Reputation: 11

Try echo $CLASSPATH in the terminal, check if there is a Java in this system. Or maybe you need to install java

Upvotes: 1

shammery
shammery

Reputation: 1072

I had the same issue, the problem was I was downloading the source of Kafka. So to make my Kafka server run, I downloaded the Kafka binaries and it worked for me.

Kafka binaries: http://mirror.cc.columbia.edu/pub/software/apache/kafka/1.1.0/

Upvotes: 21

Mideel
Mideel

Reputation: 829

In my case it has nothing to do with the binary or source cause both of them give that same "classpath is empty please build the project first" error. Its because there is a space in the path where kafka resides.

Upvotes: 47

panwar001
panwar001

Reputation: 173

Please check scala version installed in your system. It should be scalaVersion=2.11.12.

Otherwise Download the kafka binary with installed scala version.

Upvotes: 0

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