java hadoop类路径
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hadoop class path
提问by user1982993
I am trying to run some unit tests for mapper and reducer using junit and mockito.
Do I have to specify the location of the hadoop core and commons jar files in classpath everytime I run a test?.
I thought running the "hadoop" command was supposed to automatically include all the required libraries at runtime. Is there anyway to avoid typing the hadoop dependencies everytime?.
我正在尝试使用 junit 和 mockito 为 mapper 和 reducer 运行一些单元测试。
每次运行测试时，我是否都必须在类路径中指定 hadoop core 和 commons jar 文件的位置？。
我认为运行“hadoop”命令应该在运行时自动包含所有必需的库。有没有办法避免每次都输入 hadoop 依赖项？
hadoop -cp /home/xxx/Downloads/mockito-all-1.9.5.jar:/home/xxx/Downloads/junit-4.10.jar:/home/xxx/Downloads/hadoop-1.1.1/hadoop-core-1.1.1.jar:./classes:.:/home/xxx/Downloads/hadoop-1.1.1/lib/commons-logging-1.1.1.jar org.junit.runner.JUnitCore MaxTemperatureMapperTest
回答by user1687035
You can specify the classpath in hadoop-env.sh. "export HADOOP_CLASSPATH=*" The next time you run hadoop, the classpath will be automatically added.
您可以在 hadoop-env.sh 中指定类路径。"export HADOOP_CLASSPATH= *" 下次运行 hadoop 时，会自动添加类路径。
