Details
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Bug
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Resolution: Won't Fix
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Major - P3
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None
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None
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*Location*: http://docs.mongodb.org/manual/reference/command/mapReduce/
*User-Agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36
*Referrer*: https://www.google.ca/
*Screen Resolution*: 1920 x 1080
*repo*: docs
*source*: reference/command/mapReduce
*Location*: http://docs.mongodb.org/manual/reference/command/mapReduce/ *User-Agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.155 Safari/537.36 *Referrer*: https://www.google.ca/ *Screen Resolution*: 1920 x 1080 *repo*: docs *source*: reference/command/mapReduce
Description
the map reduce documentation indicates that map and reduce functions should not have side effects, but this is exactly what I want to do. I want to log errors which occur while I am mapping and reducing my data. Wanting to know how to do this.