Every time i did the following operation in Joomsef:
- generate xml sitemap
- ping google, yahoo or Bing
- process indexed link in sitemap
Joomla System return in the default admin page

Every time i did to crawl the website,
after about 2 minutes it stop with errors. If i continue, same error again and again.

I saw this issue since few days ago, when i update joomla and other components.

Hi,
The problem with sitemap is usually caused by a limit for POST data transfer being reached. Try displaying less URLs on the page, for example only 20 of them, and then try the functions again.
Open your server's errors log file when crawler reports an error and check if there is any PHP error reported.

Hello,
Now with displaying 20 urls works !!
thank you.

but, Crawling website didn't works fine, it stops about after 1.40 - 2.00 minutes, and if i click "continue" i have the same issue again, server didn't respond.

Crawling didn't works fine.

it stops about 1-2 crawling minutes