Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/hadoop/util/PlatformName

Question

I know there have been many posts regarding this exception, but I am not able to fix this issue. Classpath has to be edited I think to resolve it. I am trying to run a prog

Answer 1

In my particular case, I am using Maven, and although I had hadoop-auth in both the POM and the classpath, I was still getting this exception.

What finally fixed it for me was changing the scope for the dependency in the POM from "provided" to "compile".

Answer 2

hadoop-auth-2.2.0.jar should be there for hadoop2.2.0
Add hadoop auth jar for your version

Answer 3

If you are a maven user and faced this issue -

    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-client</artifactId>
        <version>${hadoop.client.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.hadoop</groupId>
        <artifactId>hadoop-common</artifactId>
        <version>${hadoop.client.version}</version>
    </dependency>

NOTE: :hadoop-client:2.5.2 alone didn't bring in all the required hadoop dependencies. That is why I added hadoop-common, which brought all the required deps.

Answer 4

Hadoop HADOOP_CLASSPATH issues

This would be helpful.

Thanks & Regards,
Alok Thaker