I am working on kafka strom integration. Im stuck with an error. The Build Fails when I try to Run it using
mvn -e -f m2-pom.xml compile exec:java -Dexec.classpathScope=compile -Dexec.mainClass=storm.starter.MainTopology
[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java
(default-cli) on project storm-starter: The parameters 'mainClass' for goal
org.codehaus.mojo:exec-maven-plugin:1.2.1:java are missing or invalid
This is a snippet of the pom.xml file:
<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>true</includePluginDependencies>
<classpathScope>compile</classpathScope>
<mainClass>${storm.topology}</mainClass>
</configuration>
</plugin>
I tried
rm -rf ~/.m2/
mvn clean install
I am using storm-0.9.0-rc3 and kafka-0.7.2
The element mainClass is empty because the property storm.topology has no value, this is why you get an error.
You have to pass the storm.topology parameter instead of mainClass :
mvn -e -f m2-pom.xml compile exec:java -Dstorm.topology=storm.starter.MainTopology
See the Maven section of the readme of this example for more information: https://github.com/nathanmarz/storm-starter
Could you please try adding this line
<execution>
<phase>package</phase> <!-- Add this -->
<goals>
.....
.....
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