When called, ./stop-yarn.shI get
./stop-yarn.sh
"nodemanager did not stop grace after 5 seconds: kill with kill -9."
Is this something I should worry about? What to do to avoid this error?
There is still no way to make an elegant stop. you can follow this link https://issues.apache.org/jira/browse/YARN-914 to track and change functions.
You can use the “hadoop job” to see if you have more work and use the “-kill” parameter http://hadoop.apache.org/docs/r1.0.4/commands_manual.html#job