大数据读hdfs文件笔记

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报错:

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.conf.Configuration

可能缺少commons-collections-3.2.2.jar、guava-11.0.2.jar(各版本不定自选)

报错:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/protobuf/ServiceException

可能缺少:protobuf-java-2.5.0.jar

报错:

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.apache.hadoop.security.UserGroupInformation

可能缺少:commons-configuration.jar、hadoop-auth-2.7.1.jar

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