have you shipped myMapper.sh to each node? thuhuang...@gmail.com
在 2012-5-2，下午1:17， Boyu Zhang 写道： > Hi All, > > I am in a little bit strange situation, I am using Hadoop streaming to run > a bash shell program myMapper.sh, and in the myMapper.sh, it calls a java > program, then a R program, then output intermediate key, values. I used > -file option to ship the java and R files, but the java program was not > executed by the streaming. The myMapper.sh has something like this: > > java myJava arguments > > And in the streaming command, I use something like this: > > hadoop jar /opt/hadoop/hadoop-0.20.2-streaming.jar -D mapred.reduce.tasks=0 > -input /user/input -output /user/output7 -mapper ./myMapper.sh -file > myJava.class -verbose > > And the myJava program is not run when I execute like this, and if I go to > the actual slave node to check the files, the myMapper.sh is shipped to the > slave node, but the myJava.class is not, it is inside the job.jar file. > > Can someone provide some insights on how to run a java program through > hadoop streaming? Thanks! > > Boyu
