Shawn I have added a patch to SOLR-13005 as it was a small change.

The problem with SOLR-13004 Integer overflow is that in extending the code for 
the second level of grouping I was trying not to change code that I didn't need 
to be change or would impact into other parts of the system(trying to keep the 
changes isolated to grouping where possible). The totals(when grouping) are 
held in the ResponseBuilder and I was not changing it and able to hold and 
accumulate the totals in my new grouping code. I am not sure how much work 
would be involved with changing to a long, but I am busy at the moment but may 
be able to look at a patch later.


Ian
NLA

ResponseBuilder line 184
  public int totalHitCount; // Hit count used when distributed grouping is 
performed.


-----Original Message-----
From: Shawn Heisey <[email protected]> 
Sent: Wednesday, 21 November 2018 3:58 PM
To: [email protected]
Subject: Re: 2 Level grouping (solr 5.5.3)

On 11/20/2018 9:45 PM, Ian Caldwell wrote:
>
> Yes the bugs were in the std code JIRS created.
>
> https://issues.apache.org/jira/browse/SOLR-13004
>
> https://issues.apache.org/jira/browse/SOLR-13005
>

Can you attach patches to the issues that fix the problems?  We will need to 
confirm whether the problems you found are still there in current versions -- 
5.5.3 is more than a little outdated now.  It is two major versions back from 
current, and was released two years ago.  In open source terms, that's ancient. 
 Someone else may have noticed the problems and fixed them already.

Thanks,
Shawn


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