Exception in thread "main" java.lang.NoClassDefFoundError: scala/ScalaObject

Storm集成kafka時（IDEA環境下），出現了這個問題，提示如下：

“C:\Program Files\Java\jdk1.8.0_171\bin\java” …
Exception in thread “main” java.lang.NoClassDefFoundError: scala/ScalaObject
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access100(URLClassLoader.java:73)
at java.net.URLClassLoader1.run(URLClassLoader.java:368)
at java.net.URLClassLoader1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.LauncherAppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at cn.itcast.storm.kafka.simple.KafkaProducerSimple.main(KafkaProducerSimple.java:60)
Caused by: java.lang.ClassNotFoundException: scala.ScalaObject
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.LauncherAppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
… 13 more

解決（不賣關子）：
這是由於集羣中的kafka版本與maven項目中kafka依賴不一致造成的；

完整pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.itcast</groupId>
    <artifactId>stormwordcount</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!--<dependency>-->
        <!--<groupId>org.apache.storm</groupId>-->
        <!--<artifactId>storm-core</artifactId>-->
        <!--<version>0.9.5</version>-->
        <!--&lt;!&ndash;<scope>provided</scope>&ndash;&gt;-->
        <!--</dependency>-->
        <dependency>
            <groupId>com.alibaba.jstorm</groupId>
            <artifactId>jstorm-core</artifactId>
            <version>2.1.1</version>
            <!--<scope>provided</scope>-->
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-nop</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-jdk14</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>

            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka_2.12</artifactId>
            <version>1.0.0</version>
            <!--
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka_2.8.2</artifactId>
            <version>0.8.1</version>
            -->
            <exclusions>
                <exclusion>
                    <artifactId>jmxtools</artifactId>
                    <groupId>com.sun.jdmk</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jmxri</artifactId>
                    <groupId>com.sun.jmx</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jms</artifactId>
                    <groupId>javax.jms</groupId>
                </exclusion>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
<!--
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>2.11.6</version>
        </dependency>
-->

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>cn.itcast.bigdata.hadoop.mapreduce.wordcount.WordCount</mainClass>
                        </manifest>
                    </archive>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>