Inconsistent site URLs generated when I18nLanguageId is not available

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Fix Version/s: 7.0.0 DXP FP93, 7.0.10.14 DXP SP14, 7.0.X, 7.1.10 DXP FP18, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP6, 7.2.X, 7.3.10 DXP GA1, Master
• Component/s: Portal Services > Localization
• Labels:
  • backend_test
  • ee-ts
  • liferay-dxp-70-sp14
  • liferay-dxp-71-sp5
  • liferay-fixpack-de-93-7010
  • liferay-fixpack-dxp-18-7110
  • liferay-fixpack-dxp-6-7210
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/tinatian/liferay-portal/pull/1792

Sites' URLs are incorrectly generated when I18nLanguageId is not available in the site.

Steps to reproduce:

1. Create a new site 'test' and set french as default and only current language.
2. From Liferay DXP site, write the next URL: http://localhost:8080/en/web/guest
3. From the previous URL, go to Site Selector Menu and go to the new site 'test'.

Expected result: you are redirected to http://localhost:8080/group/test

Current result:  Not found error because we are trying to access http://localhost:8080/en/group/test, and English is not among 'test''s available locales.