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Error using java.nio.channels.FileChannel on NFS mounted MapR

Question asked by matroyd on May 9, 2012
Latest reply on May 10, 2012 by matroyd
We have MapR mounted using NFS on a linux box, running a legacy java application that writes data files using java.nio.channels.FileChannel. The application can create directories, files etc. but can't write to the files due to following error: Permission denied
            at Method)
            at java.nio.channels.FileChannel.lock(

Are we allowed to only use FileReader/Writers? If yes, any reason FileChannels do not work?
Thanks, and MapR rocks !!