We recently started having a problem with our FreeSWITCH servers where calls are working well, with about 200 calls operating sometimes for a couple of days, and then something happens and all call progress stops. Then any new inbound calls that come into the server get stuck in initial status, new inbound get stuck at RINGING. This happens until the max sessions are hit and of course nothing else works from there. Our thought is something is creating a lock and stopping anything else from progressing. We are seeing the stuck sessions using "show channels". Doing a uuid_kill on the calls seems to make no difference to the output of "show channels", but we have noticed in the logs that some events do happen to some of the calls. We had ran into a similar issue when writing a custom C module and made some mistakes with session_rwlock etc. But in this case, all of this is using LUA. Some general information: FreeSWITCH Versions 1.10.6 and 1.10.1 Modules used: LUA, xml_curl(dialplan), event_socket, Most of this is just application playing audio files and or creating a new call to bridge to. Really looking for some help on what debugging we can enable to help identify what is getting stuck to identify where a bug might be on our usage or possible issue with FreeSWITCH. We have captured a core dump of the running process when it got into the bad state as well, if that is helpful, we can send it in. Thank you for your help.