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Posted to user@hadoop.apache.org by yaoxiaohua <ya...@outlook.com> on 2016/01/18 11:26:21 UTC
mapred-site.xml change need restart whole cluster?
Hi,
Env: hadoop2.3cdh5.0.2
I need update the mapred-site.xml some content, java.opts
Map and reduce's java opts, increase the memory setting.
Action:
I update one mapred-site.xml then scp to all dataodes.
Then I observe that , sometimes, the container running with
old java opts, 1200m.
Some containers running with 1638m(new).
I don't restart the rm or nm, could you tell me why?
Best Regards,
Evan Yao