Storm-Kafka : java.lang.NoClassDefFoundError: com/google/common/base/Strings - maven

Question

I am trying to run a storm LocalCluster using storm-core 1.0.2 and kafka-spout 1.0.2.
My pom file looks like below
<dependencies>
<!-- Storm Dependency -->
<dependency>
<groupId>org.apache.storm</groupId>
<artifactId>storm-core</artifactId>
<version>1.0.2</version>
<scope>provided</scope>
</dependency>
<!-- Storm Kafka Dependency -->
<dependency>
<groupId>org.apache.storm</groupId>
<artifactId>storm-kafka</artifactId>
<version>1.0.2</version>
<exclusions>
<exclusion>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
.....
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.walmartlabs.midas.storm.Topology</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<executions>
<execution>
<goals>
<goal>exec</goal>
</goals>
</execution>
</executions>
<configuration>
<executable>java</executable>
<includeProjectDependencies>true</includeProjectDependencies>
<includePluginDependencies>false</includePluginDependencies>
<classpathScope>compile</classpathScope>
<mainClass>${storm.topology}</mainClass>
</configuration>
</plugin>
</plugins>
</build>
I use following command to run storm cluster locally.
mvn package
storm jar target/myproject-0.1-SNAPSHOT-jar-with-dependencies.jar com.company.project.storm.Topology
I get following exception
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/base/Strings
at org.apache.storm.kafka.KafkaSpout.declareOutputFields(KafkaSpout.java:184)
at org.apache.storm.topology.TopologyBuilder.getComponentCommon(TopologyBuilder.java:431)
at org.apache.storm.topology.TopologyBuilder.createTopology(TopologyBuilder.java:135)
at com.walmartlabs.midas.storm.Topology.submitLocalTopology(Topology.java:50)
at com.walmartlabs.midas.storm.Topology.main(Topology.java:75)
Caused by: java.lang.ClassNotFoundException: com.google.common.base.Strings
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
The google common dependency is that of storm-kafka artifact. And i have set the scope of storm-kafka as default so i believe all its dependency should be build in my jar.
If i replace KafkaSpout with a simple spout that is just reading some file, everything works fine.
I believe while packaging the jar i am not packaging all the dependencies of storm-kafka artifact.What is wrong here?

Answer 1

https://github.com/apache/storm/tree/v1.0.2/external/storm-kafka#using-storm-kafka-with-different-versions-of-kafka
Storm 1.0.2 changed the scope of artifact "kafka_[scala_version]" to "provided", which means that you need to add this as dependency. This is for having flexibility of combination on scala version and/or kafka version.

Answer 2

I get this problem,and sovled by adding the dependency like below (ps: guava.jar
version is 16.0.1 used by storm1.0.3) .By the way,we can reference the guava version used by storm-starter.
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
<!--<version>16.0.1</version>-->
</dependency>