Empty XML output from SOLR streaming expression

[Dariusz Wojtas <dw...@gmail.com>]

Hi,

I am working with SOLR 7.4.0 and use streaming expressions.
This works nicely, the result is produced in JSON format.
But I need to have it in XML.

Simplest query to show the problem:
search(myCollection,
  zkHost="localhost:9983",
  qt="/select",
  q="*:*",
  fl="id",
  sort="id desc")

Docs say that I should add 'wt=xml' to parameters, which I add to the URL
created by SOLR -> Admin -> Stream console, but the result is not what I
expected

*Case 1 - Stream query, no 'wt' param added to URL.*
The result js in JSON format, contains 3 rows, each with an id attribute.
The URL, produced by SOLR Admin -> Stream console:

http://localhost:8983/solr/myCollection/stream?_=1538060875379&expr=search(myCollection,%0A++zkHost%3D%22localhost:9983%22,%0A++qt%3D%22%2Fselect%22,%0A++q%3D%22*:*%22,%0A++fl%3D%22id%22,%0A++sort%3D%22id+desc%22)


*Case 2 - the same URL, added '&wt=xml' at the end*
I get empty XML resultset.
I am not sure if this will be correctly passed to the mailing list, but
literally the result is literally only a root 'response' element. No
contents inside.
<response></response>

If I add '&explain=true' then the root element in the XML response contains
valid explanation block. Bot no resulting documents.

Any hint how to bring XML response to life?

Best regards,
Darek

Re: Empty XML output from SOLR streaming expression

[Joel Bernstein <jo...@gmail.com>]

Streaming expression only returns JSON. That simplified many aspects of the
implementation.


Joel Bernstein
http://joelsolr.blogspot.com/


On Thu, Sep 27, 2018 at 12:05 PM Dariusz Wojtas <dw...@gmail.com> wrote:

> Hi,
>
> I am working with SOLR 7.4.0 and use streaming expressions.
> This works nicely, the result is produced in JSON format.
> But I need to have it in XML.
>
> Simplest query to show the problem:
> search(myCollection,
>   zkHost="localhost:9983",
>   qt="/select",
>   q="*:*",
>   fl="id",
>   sort="id desc")
>
> Docs say that I should add 'wt=xml' to parameters, which I add to the URL
> created by SOLR -> Admin -> Stream console, but the result is not what I
> expected
>
> *Case 1 - Stream query, no 'wt' param added to URL.*
> The result js in JSON format, contains 3 rows, each with an id attribute.
> The URL, produced by SOLR Admin -> Stream console:
>
>
> http://localhost:8983/solr/myCollection/stream?_=1538060875379&expr=search(myCollection,%0A++zkHost%3D%22localhost:9983%22,%0A++qt%3D%22%2Fselect%22,%0A++q%3D%22*:*%22,%0A++fl%3D%22id%22,%0A++sort%3D%22id+desc%22)
>
>
> *Case 2 - the same URL, added '&wt=xml' at the end*
> I get empty XML resultset.
> I am not sure if this will be correctly passed to the mailing list, but
> literally the result is literally only a root 'response' element. No
> contents inside.
> <response></response>
>
> If I add '&explain=true' then the root element in the XML response contains
> valid explanation block. Bot no resulting documents.
>
> Any hint how to bring XML response to life?
>
> Best regards,
> Darek
>