I setup JMX monitoring of the NameNode, and it worked fine. Tried to do the same for the DataNode, and it fails.
The datanode listens on the port I specify, but VisualVM can't connect (I'm specifying no user/password/SSL). For troubleshooting purposes, I'm totally willing to try different tools than VisualVM, so if anyone knows some tool that works particularly well, I'd love to hear it. -- Tim Ellis Data Architect, Riot Games
