Unable to stream twitter data using storm

Question

I am following the steps as per the Kantega/storm-twitter-workshop project link but I am stuck at a point. While testing credentials by running the main class in folder cheating

cd cheating
mvn compile exec:java -Dexec.classpathScope=compile -Dexec.mainClass=storm.starter.CheatingTwitterFunTopology

I am getting the below error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project storm-assignment-solution: Compilation failure

[ERROR] Unable to locate the Javac Compiler in:

[ERROR] /usr/lib/jvm/java-7-openjdk-amd64/jre/../lib/tools.jar

[ERROR] Please ensure you are using JDK 1.4 or above and

[ERROR] not a JRE (the com.sun.tools.javac.Main class is required).

[ERROR] In most cases you can change the location of your Java

[ERROR] installation by setting the JAVA_HOME environment variable.

[ERROR] -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

Where am I going wrong?

user2720864 user2720864 · Accepted Answer · 2014-09-15T06:46:37

The Error says it all ..

[ERROR] Unable to locate the Javac Compiler in:
[ERROR] /usr/lib/jvm/java-7-openjdk-amd64/jre/../lib/tools.jar
[ERROR] Please ensure you are using JDK 1.4 or above and

Looking at your project page found the following
1) It uses 2 maven modules namely cheating and storm-assignment and both of them are expected to run under Java 1.6 as found in their pom.xml

Check the pom.xml for both the module has this

    <configuration>
         <source>1.6</source>
         <target>1.6</target>
    </configuration>

Make sure you are running with atleast Java 1.6 or Higher

Unable to stream twitter data using storm

1 Answers