spark編譯出錯：bad symbolic reference. A signature in Utils.class refers to term concurrent in value com.google.common.util which is not available.

環境： CentOs 6.4
spark: spark-1.2.0-cdh5.3.6

編譯到最后external/kafka報錯： bad symbolic reference. A signature in Utils.class refers to term concurrent in value com.google.common.util which is not available.

原因是：kafka項目引用了Utils.scala，Utils.scala引用guava包，而guava包只是provided用於編譯，kafka項目中並沒有guava包

解決方法：在kafka pom文件增加guava依賴

    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>14.0.1</version>        
    </dependency>

重新編譯，編譯成功