问题
I am new to Hadoop and learnt that with 2.x version, I can try Hadoop on my local Windows 7 64-bit machine.
I installed hadoop 2.6.0 and installed cygwin.
I could execute bin/hadoop version but I get the below error while executing the jar command:
Note: I have also placed the winutils.jar in the bin, from hadoop-common-2.2.0.jar.
Please help. I am not able to get rid of this error. I have also entered the input and output parameters, it still fails.
$ bin/hadoop jar /Hadoop/hadoop-2.6.0/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar wordcount
15/02/03 12:40:45 ERROR util.Shell: Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:355)
at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:370)
at org.apache.hadoop.util.Shell.<clinit>(Shell.java:363)
at org.apache.hadoop.util.GenericOptionsParser.preProcessForWindows
(GenericOptionsParser.java:438)
at org.apache.hadoop.util.GenericOptionsParser.parseGeneralOptions
(GenericOptionsParser.java:484)
at org.apache.hadoop.util.GenericOptionsParser.<init>
(GenericOptionsParser.java:170)
at org.apache.hadoop.util.GenericOptionsParser.<init>
(GenericOptionsParser.java:153)
at org.apache.hadoop.examples.WordCount.main(WordCount.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke
(ProgramDriver.java:71)
at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Usage: wordcount <in> [<in>...] <out>
I could run the below command as well:
$ bin/hadoop jar /Hadoop/hadoop-2.6.0/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.0.jar
回答1:
It used to be an issue earlier. However if you are able to run the program through jar, there could be something else at fault. If the same thing works for you using a Java code, you can edit the jar to remove the code where a new exception is being raised.
To be doubly sure, check if the bin directory contains winutils.exe and hadoop.dll.
If they are not present, chances are that someone else must have faced a similar issue and would have kept the files. These files are created when Hadoop is built from source code on the OS.
回答2:
It seems like that you have installed hadoop 2.6.0 and older version of hadoop winutils. You must install hadoop winutils of your current hadoop version. Try to download winutils from this github repo https://github.com/steveloughran/winutils/tree/master/hadoop-2.6.0/bin Finally replace your bin directory with the winutils bin directory!
来源：https://stackoverflow.com/questions/28291955/running-wordcount-hadoop-example-on-windows-using-hadoop-2-6-0