我正在学习如何使用mongodb数据作为输入来编写hadoop中的map/reduce作业。所以我也跟着this例子,但我得到了以下错误:使用mongoDB的Hadoop:NoClassDefFoundError MongoConfigUtil
Exception in thread "main" java.lang.NoClassDefFoundError: com/mongodb/hadoop/util/MongoConfigUtil
at WordCount.main(WordCount.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.lang.ClassNotFoundException: com.mongodb.hadoop.util.MongoConfigUtil
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
我已经没有任何搜索结果几个小时。任何人都可以帮助我。
你试过-libjars选项?看到这个例子https://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTutorial.html –
pom。xml不可见。它非常难以理解和回答什么是缺少你如何部署 –