I am encountering this error Exception in thread "main" java.io.IOException: Cannot open filename /data/input.txt
When trying to run this command on a single hadoop cluster running hadoop .20.2 bin/hadoop jar sample.jar ReadHadoop /data/input.txt I am trying to run a .jar java program called ReadHadoop. It basically just reads a file and outputs its contents into the cygwin command window. I have hadoop set up correctly. When I execute the command bin/start-all.sh and check localhost/50070 and 50030 everything is working correctly. What causes this error. Any help would be GREAT!!!!!!! -- View this message in context: http://old.nabble.com/Hadoop-java.io.IOexception%3A-Cannot-open-filename-tp34027586p34027586.html Sent from the Hadoop core-user mailing list archive at Nabble.com.