Question

eclipse运行hadoop错误如下 ClassNotFoundException:org.apache.hadoop.io.nativeio.NativeIO$POSIX$Stat

14/11/12 19:40:35 INFO util.NativeCodeLoader: Loaded the native-hadoop library
14/11/12 19:40:35 ERROR nativeio.NativeIO: Unable to initialize NativeIO libraries
java.lang.NoClassDefFoundError: org/apache/hadoop/io/nativeio/NativeIO$POSIX$Stat
at org.apache.hadoop.io.nativeio.NativeIO.initNative(Native Method)
at org.apache.hadoop.io.nativeio.NativeIO.<clinit>(NativeIO.java:89)
at org.apache.hadoop.fs.FileUtil.setPermission(FileUtil.java:653)
at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:509)
at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:344)
at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:189)
at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:116)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:918)
at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:912)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:912)
at org.apache.hadoop.mapreduce.Job.submit(Job.java:500)
at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:530)
at cn.edu.cqu.hadoop.sampling.Sampling.main(Sampling.java:31)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.io.nativeio.NativeIO$POSIX$Stat
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 16 more

Answer 1

如果在Eclipse运行Hadoop的mapreduce。需要把Hadoop路劲下的 etc/hadoop下面的你配置好的配置文件hdfs-site.xml拷贝到你Eclipse项目的跟目录下

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但是我能成功的运行wordcount，但当运行这个程序的时候就出错了