Error:
"ExtendedSearch gets stuck when I use "re-create index". I tried deleting several pages where it gets stuck, but it then gets stuck at another page. I also tried overwriting and deleting/re-creating. The search options are set to not index any uploaded files; the only option chosen is the "index wiki pages" option. The solr log does not show any issues."
Solution:
The PHP memory needs to be increased.