Question

As stated in the topic description, I’m trying to get Kafka 0.8 running with Scala 2.9.2.

I was able to get a working version using the quick start for 0.8 (https://cwiki.apache.org/KAFKA/kafka-08-quick-start.html), but it is compiled against Scala 2.8.0 by default.

I tried to modify the step

./sbt package 

to

./sbt "++2.9.2 package"

it compiles without errors but during start it complains that it cannot find the main class.

/tmp/kafka-8-test/kafka[0.8]$ bin/kafka-server-start.sh onfig/server1.properties
Error: Could not find or load main class kafka.Kafka

Any help will be highly appreciated.

Answer 1

The problem is that the bin/kafka-server-start.sh script uses bin/kafka-run-class.sh to execute the generated jar file.

This script has hard-coded versions, so you need to customize it like this:

...
library=$(echo "$ivyPath/org.scala-lang/scala-library/jars/scala-library-2.9.2.jar")
CLASSPATH=$CLASSPATH:$library

compiler=~$(echo "$ivyPath/org.scala-lang/scala-compiler/jars/scala-compiler-2.9.2.jar")
CLASSPATH=$CLASSPATH:$compiler

log4j=$(echo "$ivyPath/log4j/log4j/jars/log4j-1.2.15.jar")
CLASSPATH=$CLASSPATH:$log4j

slf=$(echo "$ivyPath/org.slf4j/slf4j-api/jars/slf4j-api-1.6.4.jar")
CLASSPATH=$CLASSPATH:$slf

zookeeper=$(echo "$ivyPath/org.apache.zookeeper/zookeeper/jars/zookeeper-3.3.4.jar")
CLASSPATH=$CLASSPATH:$zookeeper

jopt=$(echo "$ivyPath/net.sf.jopt-simple/jopt-simple/jars/jopt-simple-3.2.jar")
CLASSPATH=$CLASSPATH:$jopt

for file in $base_dir/core/target/scala-2.9.2/*.jar;
do
  CLASSPATH=$CLASSPATH:$file
done

for file in $base_dir/core/lib/*.jar;
do
  CLASSPATH=$CLASSPATH:$file
done

for file in $base_dir/perf/target/scala-2.9.2/kafka*.jar;
do
  CLASSPATH=$CLASSPATH:$file
done
...