JSON facets, count a long or an integer in cloud and non-cloud modes

[Markus Jelsma]

Hello,

Using SolrJ i built a method that consumes output produced by JSON facets, it 
also checks the count before further processing the output:

<result name="response" numFound="49" start="0">
</result>
<lst name="facets">
  <int name="count">49</int>
  <lst name="by_day">
    <arr name="buckets">
      <lst>

This is the code reading the count value via SolrJ:

    QueryResponse response = sourceClient.query(query);
    NamedList jsonFacets = (NamedList)response.getResponse().get("facets");
    int totalOccurences = (int)jsonFacets.get("count");

The problem is, this code doesn't work in unit tests, it throws a:
java.lang.ClassCastException: java.lang.Long cannot be cast to 
java.lang.Integer!?

But why it is an integer right? Anyway, i change the totalOccurences and the 
cast to a long and the unit tests runs just fine. But when actually running the 
code, i suddenly get another cast exception at exactly the same line.
java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long

What is going on? The only difference is that the unit tests runs in cloud mode 
via AbstractFullDistribZkTestBase, but i run the code in a local dev non-cloud 
mode. I haven't noticed this behaviour anywhere else although i have many unit 
tests consuming lots of different pieces of Solr output, and all that code runs 
fine in non-cloud mode too.

Is this to be expected, normal? Did i catch another bug?

Thanks!
Markus