Konnte mein erstes Wordcount-Beispiel in mapreduce nicht ausführen

Question

Kann mir jemand helfen, dieses Problem zu lösen?
Ich bin Anfänger auf Hadoop.

Die Schritte Ich folgte meinem Programm auszuführen:

export JAVA_HOME=/usr/lib/jvm/java-8-oracle 
export PATH=${JAVA_HOME}/bin:${PATH} 
export HADOOP_CLASSPATH=${JAVA_HOME}/lib/tools.jar 
bin/hadoop com.sun.tools.javac.Main WordCount.java 
sudo jar cf wc.jar WordCount*.class 
bin/hadoop jar wc.jar WordCount myfileName outputFile 

Das ist, was ich habe, wenn ich versuche, mein Programm

abbas@abbas:~/hadoop-2.7.3$ export JAVA_HOME=/usr/lib/jvm/java-8-oracle 
abbas@abbas:~/hadoop-2.7.3$ export PATH=${JAVA_HOME}/bin:${PATH} 
abbas@abbas:~/hadoop-2.7.3$ export HADOOP_CLASSPATH=${JAVA_HOME}/lib/tools.jar 
abbas@abbas:~/hadoop-2.7.3$ bin/hadoop com.sun.tools.javac.Main WordCount.java 
abbas@abbas:~/hadoop-2.7.3$ sudo jar cf wc.jar WordCount*.class 
abbas@abbas:~/hadoop-2.7.3$ bin/hadoop jar wc.jar WordCount tempfile output8 

17/06/09 02:20:24 INFO client.RMProxy: Connecting to ResourceManager at /0.0.0.0:8032 
17/06/09 02:20:25 WARN mapreduce.JobResourceUploader: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this. 
17/06/09 02:20:26 INFO mapreduce.JobSubmitter: Cleaning up the staging area /tmp/hadoop-yarn/staging/abbas/.staging/job_1496953867826_0001 

Exception in thread "main" org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: hdfs://localhost:9000/user/abbas/tempfile 
    at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:323) 
    at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.listStatus(FileInputFormat.java:265) 
    at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getSplits(FileInputFormat.java:387) 
    at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:301) 
    at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:318) 
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:196) 
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1290) 
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1287) 
    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:1698) 
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1287) 
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1308) 
    at WordCount.main(WordCount.java:59) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221) 
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136) 

Answer 1

Selbsterklärende zu laufen.

Eingangspfad existiert nicht: hdfs: // localhost: 9000/user/abbas/tempfile

Sie ein hdfs Benutzerverzeichnis Haben?

hdfs dfs -ls /user | grep $(whoami) 

Haben setzen Sie jede Datei tempfile dort benannt?

hdfs dfs -mkdir -p "/user/$(whoami)" 
hdfs dfs -copyFromLocal /path/to/tempfile "/user/$(whoami)" 

---

Es ist erwähnenswert, dass the example assumes you have files in HDFS already