hadoop と hdfs は、ナビゲートしたときと同じように正しく実行されているようです
http://127.0.01:50070/dfshealth.jsp
私はこの出力を受け取ります:
しかし、コードを実行しようとすると
public class firstmapreducedriver {
public static void main(String[] args) {
JobClient client = new JobClient();
JobConf conf = new JobConf(firstmapreducedriver.class);
// TODO: specify output types
conf.setOutputKeyClass(Text.class);
conf.setOutputValueClass(IntWritable.class);
// TODO: specify input and output DIRECTORIES (not files)
conf.setInputFormat(TextInputFormat.class);
conf.setOutputFormat(TextOutputFormat.class);
FileInputFormat.setInputPaths(conf, new Path("dfs"));
FileOutputFormat.setOutputPath(conf, new Path("Out"));
// TODO: specify a mapper
conf.setMapperClass(org.apache.hadoop.mapred.lib.IdentityMapper.class);
// TODO: specify a reducer
conf.setReducerClass(org.apache.hadoop.mapred.lib.IdentityReducer.class);
client.setConf(conf);
try {
JobClient.runJob(conf);
} catch (Exception e) {
e.printStackTrace();
}
}
}
次のエラーが表示されます。
13/03/04 19:53:33 WARN conf.Configuration: DEPRECATED: hadoop-site.xml found in the classpath. Usage of hadoop-site.xml is deprecated. Instead use core-site.xml, mapred-site.xml and hdfs-site.xml to override properties of core-default.xml, mapred-default.xml and hdfs-default.xml respectively
13/03/04 19:53:51 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same.
13/03/04 19:53:51 INFO mapred.JobClient: Cleaning up the staging area hdfs://localhost:9100/tmp/hadoop-newuser/mapred/staging/newuser/.staging/job_201303041945_0001
13/03/04 19:53:51 ERROR security.UserGroupInformation: PriviledgedActionException as:newuser cause:org.apache.hadoop.mapred.InvalidInputException: Input path does not exist: hdfs://localhost:9100/user/newuser/dfs
org.apache.hadoop.mapred.InvalidInputException: Input path does not exist: hdfs://localhost:9100/user/newuser/dfs
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 firstmapreducedriver.main(firstmapreducedriver.java:44)
hdfs ファイルの場所をどこで設定できますか、または "dfs" ディレクトリを作成して見つけられるようにする必要がある場所はどこですか?