rhdfs hdfs.init() error

[Paley Louie]

Hi, I have previously installed rhdfs with Hadoop 0.20.2-cdh3u3, now my hadoop version has changed to Hadoop 2.2.0 (the "HADOOP_CMD" was changed to Hadoop 2.2.0 ). When I run hdfs.init(), I got the error as:

 Loading required package: rJava

HADOOP_CMD=/data/hadoopenv/hadoop-0.20.1-gdt/bin/hadoop Be sure to run hdfs.init() Error in .jnew("org/apache/hadoop/conf/Configuration") : java.lang.ClassNotFoundException

when I change the "HADOOP_CMD" to  0.20.2-cdh3u3, it works again. 

Could anyone tell me what could be done to handle this problem? 

Thank you very much !!!

[Antonio Piccolboni]

You said you changed HADOOP_CMD but the new setting didn't seem to have taken effect from the error message. Since I have no reason to doubt your report, I suspect that you updated the variable in one environment and the R interpreter is running in a different one. Before running hdfs.init() please enter

Sys.getenv("HADOOP_CMD")

and make sure that it's set as you expect. If not, you can use Sys.setenv to correct it.

Thanks

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