Ah, figured it out (writing for posterity). Daemons expose a log level set/get gui at /logLevel:
e.g.: http://localhost:8088/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> - Patrick 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
