The same question I have has been asked on the mono mailing list 3 years ago, so I will shamelessly copy / paste from the mailing list (no answers there) :
My problem is, that a lot of requests appear to get stuck somewhere in between apache and the mod-mono-server. I activated the mod_mono control panel and I see an ever growing list of requests there, which never get processed:
Restart Server
Stop Accepting Requests
6 requests served; limit: 10000
38 requests currently being processed; limit: unlimited; total: 3679
1363 661s /myservice/users/3606/items/4
247 945s /myservice/items/2/data
2350 424s /myservice/items/4/data
1237 692s /myservice/items/3/data
....
Most requests do get processed, but the list with the dead requests is always growing until I restart apache.
Using the "restart server" from the control panel do nothing except reseting the count of requests served.
Any idea : => what can cause a request to get stuck ? => How to kill them, individually or as a whole ?
OS : Debian 3.16.51-2 Apache : 2.4.25 Mono : Mono JIT compiler version 5.18.0.268
Thanks.
