hadoop - 来自 Eclipse 的字数统计

Question

我正在使用 hadoop 的 eclipse 插件。我可以通过创建一个 hadoop 服务器来查看 HDFS 中的所有文件，但是当我尝试从 eclipse 运行 wordcount.java 文件时，它给了我异常，而从终端运行却很顺利。异常(exception)情况如下。

2/11/14 04:09:06 WARN util.NativeCodeLoader: Unable to load native-hadoop library for  your platform... using builtin-java classes where applicable
12/11/14 04:09:06 WARN mapred.JobClient: No job jar file set.  User classes may not be     found. See JobConf(Class) or JobConf#setJar(String).
12/11/14 04:09:06 WARN snappy.LoadSnappy: Snappy native library not loaded
12/11/14 04:09:06 INFO mapred.JobClient: Cleaning up the staging area file:/tmp/hadoop-hduser/mapred/staging/hduser1728681403/.staging/job_local_0001
12/11/14 04:09:06 ERROR security.UserGroupInformation: PriviledgedActionException as:hduser cause:org.apache.hadoop.mapred.InvalidInputException: Input path does not exist: file:/user/hduser/gutenberg
Exception in thread "main" org.apache.hadoop.mapred.InvalidInputException: Input path does not exist: file:/user/hduser/gutenberg
    at org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:197)
    at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:208)
    at org.apache.hadoop.mapred.JobClient.writeOldSplits(JobClient.java:989)
    at org.apache.hadoop.mapred.JobClient.writeSplits(JobClient.java:981)
    at org.apache.hadoop.mapred.JobClient.access$600(JobClient.java:174)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:897)
    at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:850)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:396)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1121)
    at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:850)
    at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:824)
    at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1261)
    at WordCount.run(WordCount.java:149)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
    at WordCount.main(WordCount.java:155)

Answer 1

我将从调查这个开始:

ERROR security.UserGroupInformation: PriviledgedActionException as:hduser cause:org.apache.hadoop.mapred.InvalidInputException: Input path does not exist: file:/user/hduser/gutenberg

看来是这个问题造成的。您确定这是正确的道路吗？如果是这样，您可能没有访问它的权限。稍后我会尝试尽可能多地消除 WARN。