Ah, figured it out (writing for posterity).
Daemons expose a log level set/get gui at /logLevel:
You enter the full qualfiied class name to retrieve the current level
or set a given level.
Also, can be done through "bin/yarn daemonlog":
java org.apache.hadoop.log.LogLevel -getlevel <host:port> <name>
java org.apache.hadoop.log.LogLevel -setlevel <host:port> <name> <level>
On Fri, Dec 23, 2011 at 12:38 PM, Patrick Wendell <[EMAIL PROTECTED]> wrote:
> How do I set the log level for the various yarn deamons to something
> more verbose (default seems to be INFO)?
> - Patrick