我开始使用hadoop在aws上运行代码。但是，我在使用hadoop jar命令时遇到了错误：

Error: java.lang.ClassNotFoundException: com.opencsv.CSVParser
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at FlightsByCarrierMapper.map(FlightsByCarrierMapper.java:10)
    at FlightsByCarrierMapper.map(FlightsByCarrierMapper.java:5)
    at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
    at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
    at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
    at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)

我在classpath和hadoop\u classpath中都包含了opencsv.jar，但仍然失败。我的hadoop版本是2.7.0和3.8。有人能帮帮我吗？