hadoop依赖

hadoop-common包依赖了servlet-api, jasper-runtime等可能与当前环境冲突的jar包，由于这些都是通过依赖关系链产生的关系，所以非常不容易被察觉。

 

 

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-common</artifactId>
    <version>2.2.0</version>
    <exclusions>
        <exclusion>
            <artifactId>servlet-api</artifactId>
            <groupId>javax.servlet</groupId>
        </exclusion>
        <exclusion>
            <artifactId>jasper-compiler</artifactId>
            <groupId>tomcat</groupId>
        </exclusion>
        <exclusion>
            <artifactId>jasper-runtime</artifactId>
            <groupId>tomcat</groupId>
        </exclusion>
        <exclusion>
            <artifactId>jsp-api</artifactId>
            <groupId>javax.servlet.jsp</groupId>
        </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>org.apache.hadoop</groupId>
    <artifactId>hadoop-hdfs</artifactId>
    <version>2.2.0</version>
    <exclusions>
        <exclusion>
            <artifactId>servlet-api</artifactId>
            <groupId>javax.servlet</groupId>
        </exclusion>
    </exclusions>
</dependency>