It doesn't accept multiple folders as input. You can have multiple files in a directory and same you can give as input.
From: Pedro Sá da Costa [mailto:[EMAIL PROTECTED]]
Sent: 22 June 2013 16:25
Subject: How run Aggregator wordcount?
Aggregator wordcount accept multiple folders as input? e.g. bin/hadoop jar hadoop-*-examples.jar aggregatewordcount inputfolder1 inputfolder2 inputfolder3 outfolder1