org.apache.oozie.action.hadoop.PigMain在oozie-core-4.0.0-cdh5.1.0.jar的jar中不可用

Question

请参阅下面的代码段。它有方法getLauncherClasses使用PIG_MAIN_CLASS_NAME 但是我没有在给定包“org.apache.oozie.action.hadoop.PigMain”的jar中找到任何类

public class PigActionExecutor扩展ScriptLanguageActionExecutor {

private static final String PIG_MAIN_CLASS_NAME = "org.apache.oozie.action.hadoop.PigMain";
public PigActionExecutor() {
    super("pig");
}

@SuppressWarnings("rawtypes")
@Override
public List<Class> getLauncherClasses() {
    List<Class> classes = new ArrayList<Class>();
    try {
        classes.add(Class.forName(PIG_MAIN_CLASS_NAME));
        classes.add(JSONParser.class);
    }
    catch (ClassNotFoundException e) {
        throw new RuntimeException("Class not found", e);
    }
    return classes;
}

为什么PIG_MAIN_CLASS_NAME在jar中丢失？

Answer 1

预计这个PigMain类将从oozie share lib路径加载。在我的情况下，oozie-sharelib-pig-4含有PigMain。