elasticsearch/elasticsearch-definitive-guide — pull request #209 by MehdyAmazigh (2014-08-31 11:59:07+00:00)
Title: Update 45_Partial_update.asciidoc

scripting for mvel is not supported in 1.3.x, but it is the default language in 1.3.x also, will be changed in 1.4.x, so you have to include lang parameter, and give value as, (lang=groovy)