Chapter 2: MapReduce: hadoop command doesn't work without class package

[Viacheslav/Slava Tradunsky]

On the 25th page of the book there is a command to execute MaxTemperature map reduce job:

hadoop MaxTemperature input/ncdc/sample.txt output

with the execution logs output. However, as for my environment the execution result is different:

ERROR: MaxTemperature is not COMMAND nor fully qualified CLASSNAME.

After a quick look it turns out that it works only with class specified including package:

hadoop oldapi.MaxTemperature input/ncdc/sample.txt output

Not sure if it is something important, but want to highlight in the case somebody stumble as I did.

uname -a
Darwin viacheslavt-mac.local 17.6.0 Darwin Kernel Version 17.6.0: Tue May 8 15:22:16 PDT 2018; root:xnu-4570.61.1~1/RELEASE_X86_64 x86_64
hadoop version
Hadoop 3.0.3

[lthing]

same error, thanks for reminding.

[Ciprian Mester Aurea]

According to latest hadoop shellcommand documentation, "the class must be part of the package":
http://hadoop.apache.org/docs/r3.1.1/hadoop-project-dist/hadoop-common/CommandsManual.html#CLASSNAME

Probably the error is happening only for newer versions of hadoop

[danielepaliotta]

What if I want to run it with the new api?

[William Gozali]

@dpstart I can run it with

hadoop jar hadoop-examples.jar MaxTemperature input/ncdc/sample.txt output

[Dat Nguyen]

Confirm that the command by @gyosh works on new Hadoop version.

[yinhongyan]

@dpstart I can run it with

hadoop jar hadoop-examples.jar MaxTemperature input/ncdc/sample.txt output

it works!

[marvinb8930]

Same error, drove me crazy, chapter two and already struggling to follow the instructions. Thanks.
Both works for me, including the package as well as command by @gyosh