Error compiling Java from command line

Question

I am doing a Friend Suggester application in Java using Hadoop 2.7.2 (latest atm) and I just finished the code. I want to compile the .java file and create the .class files but when I run the command

javac -d "/home/gramanas/" -cp "/srv/hadoop/share/hadoop/common/hadoop-common-2.7.2.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.7.2.jar:/usr/lib/jvm/java-1.7.0-openjdk-amd64" FriendSuggest.java

I get the following error:

FriendSuggest.java:63: error: 
error while writing FriendMapper: /home/gramanas/FriendSuggest$FriendMapper.class
    public static class FriendMapper
                  ^

I don't think it has something to do with the code since it compiles normally in IDEA. I want to compile it from command line but I can't get it to work.

What is the problem? How can I fix it?

Additional Info:

Ubuntu 16.04
Hadoop 2.7.2 pseudo distributed mode
java-1.7.0-openjdk-amd64

Are you sure you have writing permissions in the path where the code is? Maybe try to move it elsewhere where you are sure. — Loris Securo
– Loris Securo, Commented May 3, 2016 at 21:32
@LorisSecuro I feel stupid. But I was expecting a warning having to do with permission if that was the case. I used sudo and it compiled successfully. — The Gramm
– The Gramm, Commented May 3, 2016 at 21:36
In the future, please try to write a more informative question title, one that succinctly tells us exactly what your problem is, not a general complaint or plight. — Hovercraft Full Of Eels
– Hovercraft Full Of Eels, Commented May 3, 2016 at 21:37
Why exactly do you want to build from the command line? You can use Maven to build a JAR file for Hadoop to run — OneCricketeer
– OneCricketeer, Commented May 3, 2016 at 21:44
Don't use sudo unless you really need to. If you end up with files owned by root, you will see errors exactly like this. — Thorbjørn Ravn Andersen
– Thorbjørn Ravn Andersen, Commented May 3, 2016 at 22:45

Loris Securo · Accepted Answer · 2016-05-03 21:39:59Z

2

That type of error might be caused by not having writing permissions on the path you are executing the compilation.

You should try to compile where/when you are sure to have such permissions.

answered May 3, 2016 at 21:39

Loris Securo

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