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Posted to users@solr.apache.org by Markos Volikas <mv...@apache.org> on 2026/05/13 08:16:51 UTC

Error when combining the collapse query parser with tagging and AND

Hi everyone,

I'm getting the following error (full trace attached) when combining the 
collapse query parser with the AND operator + tagging:

Query CollapsingPostFilter(field=id, nullPolicy=ignore, 
GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not 
implement createWeight

The query parameters I've been using are:

"q":"*:*",
"q.op":"AND",
"fq":"{!tag=foo}{!collapse field=id}",

Changing the operator to OR *or* removing the tag resolves the issue.

You can reproduce by creating a collection with the default schema and 
indexing some sample data for testing the collapsing. I've tested with 
Solr 10 and Solr 7, and both have the same issue.

Do you know if this is expected behavior? And if so, why?

Thanks,

Markos

Re: Error when combining the collapse query parser with tagging and AND

Posted by David Smiley <ds...@apache.org>.
Right; "tag" is one of several special local-params that may co-exist with
others.  You needn't put another local-params wrapper just for "tag".
"cache" is the other that comes to mind.

On Thu, Jun 11, 2026 at 9:23 AM Markos Volikas <mv...@apache.org> wrote:

> Hi,
>
> For anyone interested, we've been using the following workaround:
>
> Instead of prepending the fq with the extra {!tag=foo} localParam, one
> can directly add the tag=foo key-value pair inside the {!collapse}.
>
> That is:
>
> "q":"*:*",
> "q.op":"AND",
> "fq":"{!collapse field=id*tag=foo*}",
>
> This works because tag registration in the constructor of QParser reads
> this value explicitly
> <
> https://github.com/apache/solr/blob/releases/solr/9.10.0/solr/core/src/java/org/apache/solr/search/QParser.java#L84
> >.
>
> Best,
>
> Markos
>
> On 6/9/26 13:16, Mikhail Khludnev wrote:
> > Hi,
> > Never heard of it.
> >
> > On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas<mv...@apache.org>
> wrote:
> >
> >> Thanks for the suggestion, Mikhail!
> >>
> >> So, from what I understand, this is expected behavior. Are there any
> >> plans to make it possible for such a query combination to work in the
> >> future?
> >>
> >> Markos
> >>
> >> On 5/13/26 12:00, Mikhail Khludnev wrote:
> >>> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> >>> detecting and handling postFilter-only filter queries.
> >>> Markos, as a workaround you may use a few queries, like with&without
> >>> filter, etc.
> >>>
> >>> On Wed, May 13, 2026 at 11:17 AM Markos Volikas<mv...@apache.org>
> >> wrote:
> >>>> Hi everyone,
> >>>>
> >>>> I'm getting the following error (full trace attached) when combining
> the
> >>>> collapse query parser with the AND operator + tagging:
> >>>>
> >>>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> >>>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does
> not
> >>>> implement createWeight
> >>>>
> >>>> The query parameters I've been using are:
> >>>>
> >>>> "q":"*:*",
> >>>> "q.op":"AND",
> >>>> "fq":"{!tag=foo}{!collapse field=id}",
> >>>>
> >>>> Changing the operator to OR *or* removing the tag resolves the issue.
> >>>>
> >>>> You can reproduce by creating a collection with the default schema and
> >>>> indexing some sample data for testing the collapsing. I've tested with
> >> Solr
> >>>> 10 and Solr 7, and both have the same issue.
> >>>>
> >>>> Do you know if this is expected behavior? And if so, why?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Markos
> >>>>
> >

Re: Error when combining the collapse query parser with tagging and AND

Posted by David Smiley <ds...@apache.org>.
Right; "tag" is one of several special local-params that may co-exist with
others.  You needn't put another local-params wrapper just for "tag".
"cache" is the other that comes to mind.

On Thu, Jun 11, 2026 at 9:23 AM Markos Volikas <mv...@apache.org> wrote:

> Hi,
>
> For anyone interested, we've been using the following workaround:
>
> Instead of prepending the fq with the extra {!tag=foo} localParam, one
> can directly add the tag=foo key-value pair inside the {!collapse}.
>
> That is:
>
> "q":"*:*",
> "q.op":"AND",
> "fq":"{!collapse field=id*tag=foo*}",
>
> This works because tag registration in the constructor of QParser reads
> this value explicitly
> <
> https://github.com/apache/solr/blob/releases/solr/9.10.0/solr/core/src/java/org/apache/solr/search/QParser.java#L84
> >.
>
> Best,
>
> Markos
>
> On 6/9/26 13:16, Mikhail Khludnev wrote:
> > Hi,
> > Never heard of it.
> >
> > On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas<mv...@apache.org>
> wrote:
> >
> >> Thanks for the suggestion, Mikhail!
> >>
> >> So, from what I understand, this is expected behavior. Are there any
> >> plans to make it possible for such a query combination to work in the
> >> future?
> >>
> >> Markos
> >>
> >> On 5/13/26 12:00, Mikhail Khludnev wrote:
> >>> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> >>> detecting and handling postFilter-only filter queries.
> >>> Markos, as a workaround you may use a few queries, like with&without
> >>> filter, etc.
> >>>
> >>> On Wed, May 13, 2026 at 11:17 AM Markos Volikas<mv...@apache.org>
> >> wrote:
> >>>> Hi everyone,
> >>>>
> >>>> I'm getting the following error (full trace attached) when combining
> the
> >>>> collapse query parser with the AND operator + tagging:
> >>>>
> >>>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> >>>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does
> not
> >>>> implement createWeight
> >>>>
> >>>> The query parameters I've been using are:
> >>>>
> >>>> "q":"*:*",
> >>>> "q.op":"AND",
> >>>> "fq":"{!tag=foo}{!collapse field=id}",
> >>>>
> >>>> Changing the operator to OR *or* removing the tag resolves the issue.
> >>>>
> >>>> You can reproduce by creating a collection with the default schema and
> >>>> indexing some sample data for testing the collapsing. I've tested with
> >> Solr
> >>>> 10 and Solr 7, and both have the same issue.
> >>>>
> >>>> Do you know if this is expected behavior? And if so, why?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Markos
> >>>>
> >

Re: Error when combining the collapse query parser with tagging and AND

Posted by Mikhail Khludnev <mk...@apache.org>.
Right. Thanks for posting the solution!

On Thu, Jun 11, 2026 at 4:24 PM Markos Volikas <mv...@apache.org> wrote:

> Hi,
>
> For anyone interested, we've been using the following workaround:
>
> Instead of prepending the fq with the extra {!tag=foo} localParam, one
> can directly add the tag=foo key-value pair inside the {!collapse}.
>
> That is:
>
> "q":"*:*",
> "q.op":"AND",
> "fq":"{!collapse field=id*tag=foo*}",
>
> This works because tag registration in the constructor of QParser reads
> this value explicitly
> <
> https://github.com/apache/solr/blob/releases/solr/9.10.0/solr/core/src/java/org/apache/solr/search/QParser.java#L84
> >.
>
> Best,
>
> Markos
>
> On 6/9/26 13:16, Mikhail Khludnev wrote:
> > Hi,
> > Never heard of it.
> >
> > On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas<mv...@apache.org>
> wrote:
> >
> >> Thanks for the suggestion, Mikhail!
> >>
> >> So, from what I understand, this is expected behavior. Are there any
> >> plans to make it possible for such a query combination to work in the
> >> future?
> >>
> >> Markos
> >>
> >> On 5/13/26 12:00, Mikhail Khludnev wrote:
> >>> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> >>> detecting and handling postFilter-only filter queries.
> >>> Markos, as a workaround you may use a few queries, like with&without
> >>> filter, etc.
> >>>
> >>> On Wed, May 13, 2026 at 11:17 AM Markos Volikas<mv...@apache.org>
> >> wrote:
> >>>> Hi everyone,
> >>>>
> >>>> I'm getting the following error (full trace attached) when combining
> the
> >>>> collapse query parser with the AND operator + tagging:
> >>>>
> >>>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> >>>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does
> not
> >>>> implement createWeight
> >>>>
> >>>> The query parameters I've been using are:
> >>>>
> >>>> "q":"*:*",
> >>>> "q.op":"AND",
> >>>> "fq":"{!tag=foo}{!collapse field=id}",
> >>>>
> >>>> Changing the operator to OR *or* removing the tag resolves the issue.
> >>>>
> >>>> You can reproduce by creating a collection with the default schema and
> >>>> indexing some sample data for testing the collapsing. I've tested with
> >> Solr
> >>>> 10 and Solr 7, and both have the same issue.
> >>>>
> >>>> Do you know if this is expected behavior? And if so, why?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Markos
> >>>>
> >



-- 
Sincerely yours
Mikhail Khludnev

Re: Error when combining the collapse query parser with tagging and AND

Posted by Mikhail Khludnev <mk...@apache.org>.
Right. Thanks for posting the solution!

On Thu, Jun 11, 2026 at 4:24 PM Markos Volikas <mv...@apache.org> wrote:

> Hi,
>
> For anyone interested, we've been using the following workaround:
>
> Instead of prepending the fq with the extra {!tag=foo} localParam, one
> can directly add the tag=foo key-value pair inside the {!collapse}.
>
> That is:
>
> "q":"*:*",
> "q.op":"AND",
> "fq":"{!collapse field=id*tag=foo*}",
>
> This works because tag registration in the constructor of QParser reads
> this value explicitly
> <
> https://github.com/apache/solr/blob/releases/solr/9.10.0/solr/core/src/java/org/apache/solr/search/QParser.java#L84
> >.
>
> Best,
>
> Markos
>
> On 6/9/26 13:16, Mikhail Khludnev wrote:
> > Hi,
> > Never heard of it.
> >
> > On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas<mv...@apache.org>
> wrote:
> >
> >> Thanks for the suggestion, Mikhail!
> >>
> >> So, from what I understand, this is expected behavior. Are there any
> >> plans to make it possible for such a query combination to work in the
> >> future?
> >>
> >> Markos
> >>
> >> On 5/13/26 12:00, Mikhail Khludnev wrote:
> >>> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> >>> detecting and handling postFilter-only filter queries.
> >>> Markos, as a workaround you may use a few queries, like with&without
> >>> filter, etc.
> >>>
> >>> On Wed, May 13, 2026 at 11:17 AM Markos Volikas<mv...@apache.org>
> >> wrote:
> >>>> Hi everyone,
> >>>>
> >>>> I'm getting the following error (full trace attached) when combining
> the
> >>>> collapse query parser with the AND operator + tagging:
> >>>>
> >>>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> >>>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does
> not
> >>>> implement createWeight
> >>>>
> >>>> The query parameters I've been using are:
> >>>>
> >>>> "q":"*:*",
> >>>> "q.op":"AND",
> >>>> "fq":"{!tag=foo}{!collapse field=id}",
> >>>>
> >>>> Changing the operator to OR *or* removing the tag resolves the issue.
> >>>>
> >>>> You can reproduce by creating a collection with the default schema and
> >>>> indexing some sample data for testing the collapsing. I've tested with
> >> Solr
> >>>> 10 and Solr 7, and both have the same issue.
> >>>>
> >>>> Do you know if this is expected behavior? And if so, why?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Markos
> >>>>
> >



-- 
Sincerely yours
Mikhail Khludnev

Re: Error when combining the collapse query parser with tagging and AND

Posted by Markos Volikas <mv...@apache.org>.
Hi,

For anyone interested, we've been using the following workaround:

Instead of prepending the fq with the extra {!tag=foo} localParam, one 
can directly add the tag=foo key-value pair inside the {!collapse}.

That is:

"q":"*:*",
"q.op":"AND",
"fq":"{!collapse field=id*tag=foo*}",

This works because tag registration in the constructor of QParser reads 
this value explicitly 
<https://github.com/apache/solr/blob/releases/solr/9.10.0/solr/core/src/java/org/apache/solr/search/QParser.java#L84>.

Best,

Markos

On 6/9/26 13:16, Mikhail Khludnev wrote:
> Hi,
> Never heard of it.
>
> On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas<mv...@apache.org> wrote:
>
>> Thanks for the suggestion, Mikhail!
>>
>> So, from what I understand, this is expected behavior. Are there any
>> plans to make it possible for such a query combination to work in the
>> future?
>>
>> Markos
>>
>> On 5/13/26 12:00, Mikhail Khludnev wrote:
>>> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
>>> detecting and handling postFilter-only filter queries.
>>> Markos, as a workaround you may use a few queries, like with&without
>>> filter, etc.
>>>
>>> On Wed, May 13, 2026 at 11:17 AM Markos Volikas<mv...@apache.org>
>> wrote:
>>>> Hi everyone,
>>>>
>>>> I'm getting the following error (full trace attached) when combining the
>>>> collapse query parser with the AND operator + tagging:
>>>>
>>>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
>>>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
>>>> implement createWeight
>>>>
>>>> The query parameters I've been using are:
>>>>
>>>> "q":"*:*",
>>>> "q.op":"AND",
>>>> "fq":"{!tag=foo}{!collapse field=id}",
>>>>
>>>> Changing the operator to OR *or* removing the tag resolves the issue.
>>>>
>>>> You can reproduce by creating a collection with the default schema and
>>>> indexing some sample data for testing the collapsing. I've tested with
>> Solr
>>>> 10 and Solr 7, and both have the same issue.
>>>>
>>>> Do you know if this is expected behavior? And if so, why?
>>>>
>>>> Thanks,
>>>>
>>>> Markos
>>>>
>

Re: Error when combining the collapse query parser with tagging and AND

Posted by Markos Volikas <mv...@apache.org>.
Hi,

For anyone interested, we've been using the following workaround:

Instead of prepending the fq with the extra {!tag=foo} localParam, one 
can directly add the tag=foo key-value pair inside the {!collapse}.

That is:

"q":"*:*",
"q.op":"AND",
"fq":"{!collapse field=id*tag=foo*}",

This works because tag registration in the constructor of QParser reads 
this value explicitly 
<https://github.com/apache/solr/blob/releases/solr/9.10.0/solr/core/src/java/org/apache/solr/search/QParser.java#L84>.

Best,

Markos

On 6/9/26 13:16, Mikhail Khludnev wrote:
> Hi,
> Never heard of it.
>
> On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas<mv...@apache.org> wrote:
>
>> Thanks for the suggestion, Mikhail!
>>
>> So, from what I understand, this is expected behavior. Are there any
>> plans to make it possible for such a query combination to work in the
>> future?
>>
>> Markos
>>
>> On 5/13/26 12:00, Mikhail Khludnev wrote:
>>> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
>>> detecting and handling postFilter-only filter queries.
>>> Markos, as a workaround you may use a few queries, like with&without
>>> filter, etc.
>>>
>>> On Wed, May 13, 2026 at 11:17 AM Markos Volikas<mv...@apache.org>
>> wrote:
>>>> Hi everyone,
>>>>
>>>> I'm getting the following error (full trace attached) when combining the
>>>> collapse query parser with the AND operator + tagging:
>>>>
>>>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
>>>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
>>>> implement createWeight
>>>>
>>>> The query parameters I've been using are:
>>>>
>>>> "q":"*:*",
>>>> "q.op":"AND",
>>>> "fq":"{!tag=foo}{!collapse field=id}",
>>>>
>>>> Changing the operator to OR *or* removing the tag resolves the issue.
>>>>
>>>> You can reproduce by creating a collection with the default schema and
>>>> indexing some sample data for testing the collapsing. I've tested with
>> Solr
>>>> 10 and Solr 7, and both have the same issue.
>>>>
>>>> Do you know if this is expected behavior? And if so, why?
>>>>
>>>> Thanks,
>>>>
>>>> Markos
>>>>
>

Re: Error when combining the collapse query parser with tagging and AND

Posted by Mikhail Khludnev <mk...@apache.org>.
Hi,
Never heard of it.

On Mon, Jun 8, 2026 at 6:05 PM Markos Volikas <mv...@apache.org> wrote:

> Thanks for the suggestion, Mikhail!
>
> So, from what I understand, this is expected behavior. Are there any
> plans to make it possible for such a query combination to work in the
> future?
>
> Markos
>
> On 5/13/26 12:00, Mikhail Khludnev wrote:
> > Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> > detecting and handling postFilter-only filter queries.
> > Markos, as a workaround you may use a few queries, like with&without
> > filter, etc.
> >
> > On Wed, May 13, 2026 at 11:17 AM Markos Volikas <mv...@apache.org>
> wrote:
> >
> >> Hi everyone,
> >>
> >> I'm getting the following error (full trace attached) when combining the
> >> collapse query parser with the AND operator + tagging:
> >>
> >> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> >> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
> >> implement createWeight
> >>
> >> The query parameters I've been using are:
> >>
> >> "q":"*:*",
> >> "q.op":"AND",
> >> "fq":"{!tag=foo}{!collapse field=id}",
> >>
> >> Changing the operator to OR *or* removing the tag resolves the issue.
> >>
> >> You can reproduce by creating a collection with the default schema and
> >> indexing some sample data for testing the collapsing. I've tested with
> Solr
> >> 10 and Solr 7, and both have the same issue.
> >>
> >> Do you know if this is expected behavior? And if so, why?
> >>
> >> Thanks,
> >>
> >> Markos
> >>
> >
>


-- 
Sincerely yours
Mikhail Khludnev

Re: Error when combining the collapse query parser with tagging and AND

Posted by Markos Volikas <mv...@apache.org>.
Thanks for the suggestion, Mikhail!

So, from what I understand, this is expected behavior. Are there any 
plans to make it possible for such a query combination to work in the 
future?

Markos

On 5/13/26 12:00, Mikhail Khludnev wrote:
> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> detecting and handling postFilter-only filter queries.
> Markos, as a workaround you may use a few queries, like with&without
> filter, etc.
>
> On Wed, May 13, 2026 at 11:17 AM Markos Volikas <mv...@apache.org> wrote:
>
>> Hi everyone,
>>
>> I'm getting the following error (full trace attached) when combining the
>> collapse query parser with the AND operator + tagging:
>>
>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
>> implement createWeight
>>
>> The query parameters I've been using are:
>>
>> "q":"*:*",
>> "q.op":"AND",
>> "fq":"{!tag=foo}{!collapse field=id}",
>>
>> Changing the operator to OR *or* removing the tag resolves the issue.
>>
>> You can reproduce by creating a collection with the default schema and
>> indexing some sample data for testing the collapsing. I've tested with Solr
>> 10 and Solr 7, and both have the same issue.
>>
>> Do you know if this is expected behavior? And if so, why?
>>
>> Thanks,
>>
>> Markos
>>
>

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Re: Error when combining the collapse query parser with tagging and AND

Posted by Markos Volikas <mv...@apache.org>.
Thanks for the suggestion, Mikhail!

So, from what I understand, this is expected behavior. Are there any 
plans to make it possible for such a query combination to work in the 
future?

Markos

On 5/13/26 12:00, Mikhail Khludnev wrote:
> Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
> detecting and handling postFilter-only filter queries.
> Markos, as a workaround you may use a few queries, like with&without
> filter, etc.
>
> On Wed, May 13, 2026 at 11:17 AM Markos Volikas <mv...@apache.org> wrote:
>
>> Hi everyone,
>>
>> I'm getting the following error (full trace attached) when combining the
>> collapse query parser with the AND operator + tagging:
>>
>> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
>> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
>> implement createWeight
>>
>> The query parameters I've been using are:
>>
>> "q":"*:*",
>> "q.op":"AND",
>> "fq":"{!tag=foo}{!collapse field=id}",
>>
>> Changing the operator to OR *or* removing the tag resolves the issue.
>>
>> You can reproduce by creating a collection with the default schema and
>> indexing some sample data for testing the collapsing. I've tested with Solr
>> 10 and Solr 7, and both have the same issue.
>>
>> Do you know if this is expected behavior? And if so, why?
>>
>> Thanks,
>>
>> Markos
>>
>

Re: Error when combining the collapse query parser with tagging and AND

Posted by Mikhail Khludnev <mk...@apache.org>.
Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
detecting and handling postFilter-only filter queries.
Markos, as a workaround you may use a few queries, like with&without
filter, etc.

On Wed, May 13, 2026 at 11:17 AM Markos Volikas <mv...@apache.org> wrote:

> Hi everyone,
>
> I'm getting the following error (full trace attached) when combining the
> collapse query parser with the AND operator + tagging:
>
> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
> implement createWeight
>
> The query parameters I've been using are:
>
> "q":"*:*",
> "q.op":"AND",
> "fq":"{!tag=foo}{!collapse field=id}",
>
> Changing the operator to OR *or* removing the tag resolves the issue.
>
> You can reproduce by creating a collection with the default schema and
> indexing some sample data for testing the collapsing. I've tested with Solr
> 10 and Solr 7, and both have the same issue.
>
> Do you know if this is expected behavior? And if so, why?
>
> Thanks,
>
> Markos
>


-- 
Sincerely yours
Mikhail Khludnev

Re: Error when combining the collapse query parser with tagging and AND

Posted by Mikhail Khludnev <mk...@apache.org>.
Perhaps, SolrIndexSearcher.getProcessedFilter() may do a better job
detecting and handling postFilter-only filter queries.
Markos, as a workaround you may use a few queries, like with&without
filter, etc.

On Wed, May 13, 2026 at 11:17 AM Markos Volikas <mv...@apache.org> wrote:

> Hi everyone,
>
> I'm getting the following error (full trace attached) when combining the
> collapse query parser with the AND operator + tagging:
>
> Query CollapsingPostFilter(field=id, nullPolicy=ignore,
> GroupHeadSelector(selectorText=score, type=SCORE), size=100000) does not
> implement createWeight
>
> The query parameters I've been using are:
>
> "q":"*:*",
> "q.op":"AND",
> "fq":"{!tag=foo}{!collapse field=id}",
>
> Changing the operator to OR *or* removing the tag resolves the issue.
>
> You can reproduce by creating a collection with the default schema and
> indexing some sample data for testing the collapsing. I've tested with Solr
> 10 and Solr 7, and both have the same issue.
>
> Do you know if this is expected behavior? And if so, why?
>
> Thanks,
>
> Markos
>


-- 
Sincerely yours
Mikhail Khludnev