hadoop warn EBADF: Bad file descriptor
I had a similar error and I end up on your question, and this mail list thread EBADF: Bad file descriptor
To clarify a little bit, the readahead pool can sometimes spit out this message if you close a file while a readahead request is in flight. It's not an error and just reflects the fact that the file was closed hastily, probably because of some other bug which is the real problem.
In my case I was closing a writer without flushing it with hflush
Since you don't seem to use by hand a writer or a reader, I would probably have a look to how you are sending the mr task.