From: Joel Pearson <lists@...>
Date: 2013-08-06T09:46:05+02:00
Subject: Re: undefined method []' for nil:NilClass (NoMethodError)

Line 50 in that script is this:

cache = Hash[*res['solr-mbeans']]['CACHE']

I'd suggest breaking that section down into a step-by-step and using 
"puts" on each part of the process to debug it.

You'll probably find that there's an element missing from the Hash, 
causing it to return nil.

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