Sitemap.xml doesn't create new sitemaps passing 50k URLs or 50MB uncompressed for each layout

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.2 CE GA3, 7.1.X, Master
• Fix Version/s: 7.1.10 DXP FP19, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP7, 7.2.X, 7.3.3 CE GA4, 7.3.4 CE GA5, 7.3.10 DXP GA1, Master
• Component/s: Core Infrastructure, SEO Tools > Sitemap Protocol, Sites Administration > Sites
• Labels:
  • ee-ts
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-19-7110
  • liferay-fixpack-dxp-7-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/1288

Regarding search engine limitations, there are these rules for sitemaps:

Any Sitemap file is limited to 50MB (uncompressed) with a maximum of 50,000 URLs.

But if you pass this number, no new sitemap file gets created.

With having 50002 web contents with certain display page

Steps to reproduce:
1) Run the following Groovy script:

def company = com.liferay.portal.kernel.util.PortalUtil.getCompany(actionRequest);
long companyId = company.getCompanyId();

def user = com.liferay.portal.kernel.util.PortalUtil.getUser(actionRequest);
long userId = user.getUserId();

def guestGroup = com.liferay.portal.kernel.service.GroupLocalServiceUtil.getGroup(companyId, com.liferay.portal.kernel.model.GroupConstants.GUEST);
def groupId = guestGroup.getGroupId();

def type = com.liferay.portal.kernel.model.LayoutConstants.TYPE_PORTLET;

def serviceContext = new com.liferay.portal.kernel.service.ServiceContext();

def pagePrefix = "my-layout-";

for (int i = 1; i <= 50001; i++) {
    def name = pagePrefix + i;
    def title = name;
    def description = name;
    def friendlyURL = "/" + name;
    com.liferay.portal.kernel.service.LayoutLocalServiceUtil.addLayout(userId, groupId, false, com.liferay.portal.kernel.model.LayoutConstants.DEFAULT_PARENT_LAYOUT_ID, name, title, description, type, false, false, friendlyURL, serviceContext);
}

2) When finished, download the sitemap.xml file from http://localhost:8080/sitemap.xml
3) Executed the shell command:

grep -o '<loc>' sitemap.xml | wc -l

4) Check the value obtained by the command executed previously

Expected behavior:

• The value is 50000

Actual behavior:

• The value is 50002 (50001 pages created by the script plus the initial page already created at the time of the first installation)