Hi, we’ve been using Chef successfully for quite a while but yesterday started having a problem where any chef-client run crashes with:
================================================================================ Error Syncing Cookbooks: ================================================================================ Unexpected Error: ----------------- NoMethodError: undefined method `each' for nil:NilClass
The crash site is in synchronizer.rb at line 110:
def files @files ||= cookbooks.inject() do |memo, cookbook| @eager_segments.each do |segment| cookbook.manifest[segment].each do |manifest_record| # Crash memo << CookbookFile.new(cookbook, segment, manifest_record) end end memo end end
For some (but not all) cookbooks, the server always sends a  as the value of an empty key, but for other cookbooks it doesn’t add the key to the response object (Chef::Cookbook::Metadata) so cookbook.manifest[segment] is nil and cookbook.manifest[segment].each crashes.
It seems strange that this started happening yesterday afternoon. We’ve been using chef-client 12.18.31 for a while and didn’t change it yesterday. Our chef server reports as 12.2.0 and we didn’t explicitly make any changes to it, either.
We’d be grateful for any suggestions as to how to get out of this pickle.