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Hadoop-2.2.0 ""

+3 votes

Is it correct to say that in hadoop-2.2.0, the mapred-site.xml node "" is replaced by two new node "" and ""?

posted Dec 4, 2013 by Luv Kumar

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1 Answer

+1 vote

Yes but the old property is yet to be entirely removed (removal of configs is graceful).

These properties were introduced to provide more fine-tuned way to configure each type of task separately, but the older value continues to be accepted if present; the current behaviour is that if the MR
runtime finds configured, it will override values of| configs. To configure| therefore, you should make sure you aren't passing (which is also no longer in the mapred-default.xml intentionally).

answer Dec 4, 2013 by Dewang Chaudhary
Actually, its the other way around. The presence of| overrides, not the other way round as I had stated earlier (below).
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