Never mind, its in the ApplicationClientProtocol class. John
From: John Lilley [mailto:john.lil...@redpoint.net] Sent: Thursday, September 19, 2013 6:12 PM To: user@hadoop.apache.org Subject: How to get number of data nodes as a hadoop client How does a Hadoop client query the number of datanodes in a Hadoop cluster? I see getClusterNodes() in the RM protocol, but I'm having a hard time mapping that to a public class/interface that a client would use. Looking at it more carefully, I'd really like query the nodes in a specific queue or the "default queue", if there is such a thing. Thanks john
