[TYPO3-Solr] Indexing problem of content on subdomains

[Rumen Petrov]

Hello,

i have the problem that the global search is not displaying content located on subdomains.
Here a simplified setup of my page:

- Root
-- subpage 1 ...
-- subpage 100
-- Subdomain 1
--- subpage 101 ...
--- subpage 150
-- Subdomain 2
--- subpage 151 ...
--- subpage 200

So the subdomains are part of the roottree [id=1]. There i have a few hundred pages.
The subdomains (around 40) also contain around 50 pages each, so i got in overall some thousand pages.

The site is multilingual by the L-Parameter, so i have 8 languages and 8 cores, the allocation here works fine, the english pages go to the english core.

The problem is the search results only show pages that are not part of a subdomain.
All pages are listed in the "tx_solr_indexqueue_item" table with root-id 1. When i start indexing a subdomain the pages are added with the according root-id but still dont show up in the results.

Is there any configuration to do so that the whole index is used?