Yes, it makes sense in this case, it's just confusing because it happens 
differently in other situations - when doing a normal scroll (not 
scanning), shards.successful is non-zero even when you've reached the point 
where there's no more results (and even if you keep going). And if you do a 
search returning no results, shards.successful is also non-zero.

So, should I ever (not just when scrolling) consider shards.successful=0 to 
indicate a failure? Or should I ignore it and only look at the 
shards.failed?

On Monday, August 4, 2014 12:27:22 PM UTC+1, Clinton Gormley wrote:
>
> This is correct. On the last request, no hits are returned because all 
> shards have already been drained of results.  If you look at shards.total 
> and shards.failed, you'll see they are also 0
>
> clint
>
>
> On 4 August 2014 12:54, Tim S <[email protected] <javascript:>> wrote:
>
>> When scroll-scanning 
>> <http://www.elasticsearch.org/guide/en/elasticsearch/reference/1.x/search-request-scroll.html#scroll-scan>,
>>  
>> I keep scrolling until I get a result that returns 0 docs, which is what 
>> the docs seem to suggest that I should do.
>>
>> But the final request (the one that returns 0 docs), always has 
>> _shards.successful=0. Normally, I’d consider this to indicate a failure 
>> (no shards responded). If doing a normal (non-scan) scroll, 
>> _shards.successful=1 (I’ve got 1 shard in this case), even when I’ve got 
>> to the point where there’s no more docs to scroll.
>>
>> Is this a bug in the scanning? Or am I wrong to consider the 
>> _shards.successful=0 to indicate a failure?
>>
>> Tested on version 1.3.1.
>>  
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