调整mongodb和spark的时候遇到Exception in thread "main" java.lang.SecurityException: clas

     整合mongodb和spark的时候遇到一个巨大的坑，运行程序时报：Exception in thread "main" java.lang.SecurityException: class "javax.servlet错误！！！

    问题本质：maven 导入jar包依赖冲突，既有jsp-api-2.1.jar  又有servlet-api-2.5.jar

    解决办法：修改pom文件的依赖，用exclusion把冲突的jar去掉即可

 <dependency>
            <groupId>org.mongodb.mongo-hadoop</groupId>
            <artifactId>mongo-hadoop-core</artifactId>
            <version>2.0.1</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>