NoClassDefFoundError : org.apache.commons.lang.StringUtils

Question

Caused by: java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
    at org.apache.maven.wagon.providers.file.FileWagon.resolveDestinationPath(FileWagon.java:206)
    at org.apache.maven.wagon.providers.file.FileWagon.putDirectory(FileWagon.java:157)
    at org.apache.maven.plugins.site.deploy.AbstractDeployMojo.push(AbstractDeployMojo.java:441)
    at org.apache.maven.plugins.site.deploy.AbstractDeployMojo.deploy(AbstractDeployMojo.java:323)
    at org.apache.maven.plugins.site.deploy.AbstractDeployMojo.deployTo(AbstractDeployMojo.java:284)
    at org.apache.maven.plugins.site.deploy.AbstractDeployMojo.execute(AbstractDeployMojo.java:166)
    at org.apache.maven.plugins.site.deploy.SiteStageMojo.execute(SiteStageMojo.java:78)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
    ... 20 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:235)
    at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
    ... 28 more

This happens when I try to run

mvn site site:stage              

pom.xml is:

<dependencyManagement>
    <dependencies>
        <!-- Appengine Dependencies -->
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>${appengine.target.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-testing</artifactId>
            <version>${appengine.target.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-stubs</artifactId>
            <version>${appengine.target.version}</version>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-labs</artifactId>
            <version>${appengine.target.version}</version>
        </dependency>
        <!-- Libraries -->
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>18.0</version>
        </dependency>
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>com.googlecode.lambdaj</groupId>
            <artifactId>lambdaj</artifactId>
            <version>2.3.3</version>
        </dependency>
    </dependencies>
</dependencyManagement>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-site-plugin</artifactId>
            <version>3.4</version>
            <configuration>
                <port>9000</port>
                <tempWebappDirectory>${basedir}/target/site/tempdir</tempWebappDirectory>
            </configuration>
            <executions>
                <execution>
                    <id>attach-descriptor</id>
                    <goals>
                        <goal>attach-descriptor</goal>
                    </goals>
                </execution>
            </executions>       
        </plugin>
    </plugins>
    <pluginManagement>
        <plugins>
            <!--This plugin's configuration is used to store Eclipse m2e settings 
                only. It has no influence on the Maven build itself. -->
            <plugin>
                <groupId>org.eclipse.m2e</groupId>
                <artifactId>lifecycle-mapping</artifactId>
                <version>1.0.0</version>
                <configuration>
                    <lifecycleMappingMetadata>
                        <pluginExecutions>
                            <pluginExecution>
                                <pluginExecutionFilter>
                                    <groupId>
                                        org.codehaus.mojo
                                    </groupId>
                                    <artifactId>
                                        versions-maven-plugin
                                    </artifactId>
                                    <versionRange>
                                        [2.1,)
                                    </versionRange>
                                    <goals>
                                        <goal>
                                            display-dependency-updates
                                        </goal>
                                        <goal>
                                            display-plugin-updates
                                        </goal>
                                    </goals>
                                </pluginExecutionFilter>
                                <action>
                                    <ignore></ignore>
                                </action>
                            </pluginExecution>
                        </pluginExecutions>
                    </lifecycleMappingMetadata>
                </configuration>
            </plugin>
            <!-- standard plugins -->
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>versions-maven-plugin</artifactId>
                <version>2.1</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <version>3.2</version>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.5</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.7</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.5.2</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-project-info-reports-plugin</artifactId>
                <version>2.7</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-deploy-plugin</artifactId>
                <version>2.5</version>
            </plugin>
            <!-- appengine -->
            <plugin>
                <groupId>com.google.appengine</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>${appengine.target.version}</version>
                <configuration>
                    <enableJarClasses>false</enableJarClasses>
                    <!-- Comment in the below snippet to bind to all IPs instead of just 
                        localhost -->
                    <!-- address>0.0.0.0</address> <port>8080</port -->
                    <!-- Comment in the below snippet to enable local debugging with a remove 
                        debugger like those included with Eclipse or IntelliJ -->
                    <!-- jvmFlags> <jvmFlag>-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n</jvmFlag> 
                        </jvmFlags -->
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.17</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-report-plugin</artifactId>
                <version>2.17</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-failsafe-plugin</artifactId>
                <version>2.17</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.9</version>
            </plugin>
        </plugins>
    </pluginManagement>
</build>
<reporting>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-project-info-reports-plugin</artifactId>
            <version>2.7</version>
            <reportSets>
                <reportSet>
                    <reports>
                        <report>index</report>
                        <report>dependencies</report>
                        <report>dependency-convergence</report>
                        <report>dependency-management</report>
                        <report>distribution-management</report>
                        <report>modules</report>
                        <report>plugin-management</report>
                        <report>plugins</report>
                        <report>summary</report>
                        <report>issue-tracking</report>
                        <report>scm</report>
                    </reports>
                </reportSet>
            </reportSets>
        </plugin>
    </plugins>
</reporting>

In the repository I see that in commons-lang/commons-lang/ folder
there are four of them 2.1, 2.4, 2.5, 2.6 but 2.1 and 2.4 has no jar in the folder just the other files. There are jars in 2.5 and 2.6 folders.
And in org/apache/commons/commons-lang3 folder I see one 3.1 with the jar

I have broken this down to the point of absolute basic observation so that someone with the similar experience could help me out.

Answer 1

You should change commons-lang3.jar dependency version using in pom.xml. if you are doing code in java simple project add another jar whatever version you are using. or you can check jar replication shouldn't be there.