We found out an issue with latest version of Freeswitch 1.10.10.
Some calls cdrs are not posted to url from Freeswitch module xml_cdr. They are logged to disk. And if we manually post CDR to our url, everything is ok, so there is no error in processing of CDR on web server side.
Than we monitored all cdr requests posted to our web server and call that failed to save cdr, it didn’t reached web server.
And in log there is an error:
2023-09-22 10:25:53.094819 67.25% [ERR] mod_xml_cdr.c:394 Got error  posting to web server [http://xxxxxxx]
2023-09-22 10:25:53.094819 67.25% [ERR] mod_xml_cdr.c:401 Retry will be with url [http://xxxxxx]
2023-09-22 10:25:53.094819 67.25% [ERR] mod_xml_cdr.c:417 Unable to post to web server, writing to file
Is it possible that is something with upgraded curl library as xml_cdr module is using it?
And we even don’t know how to trace in detail what is happening at the moment when cdr is posted. We can only check FS logs and monitor our web server. And this started after upgrade. Before it worked for years.