sec-mod socket closes suddenly

[Mani Behrouz]

ocserv exit after a while with this logs


May  1 08:57:23 debian ocserv[13686]: sec-mod: using 'radius'
authentication to authenticate user (session: EFlTS)
May  1 08:57:24 debian ocserv[13686]: radius-auth: communicating
username (trial000050) and password
May  1 08:57:25 debian ocserv[13686]: radius-auth: communicating
username (trial000050) and password
May  1 08:57:25 debian ocserv[13685]: main[trial000057]: 5.*.*.*:18052
user disconnected
May  1 08:57:26 debian ocserv[13686]: sec-mod: temporarily closing
session for trial000057 (session: CprMq)
May  1 08:57:26 debian ocserv[13686]: sec-mod: invalidating session of
user 'trial000057' (session: CprMq)
May  1 08:57:26 debian ocserv[13686]: radius-auth: sending session
interim update
May  1 08:57:26 debian ocserv[13686]: rc_avpair_new: unknown attribute 52
May  1 08:57:26 debian ocserv[13685]: main[trial000057]: 5.*.*.*:18052
main-sec-mod-cmd.c:335: error receiving auth cli stats message from
sec-mod cmd socket: Interrupted system call
May  1 08:57:26 debian ocserv[13685]: sh: echo: I/O error
May  1 08:57:27 debian ocserv[13686]: radius-auth: communicating
username (trial000050) and password
May  1 08:57:28 debian ocserv[13686]: sec-mod: error processing data
for 'sm: auth cont' command (-3)
May  1 08:57:28 debian ocserv[17327]: worker[trial000050]:
164.138.169.192 worker-auth.c:1403: failed authentication for
'trial000050'
May  1 08:57:28 debian ocserv[13685]: main: main-sec-mod-cmd.c:109:
cannot obtain data from command socket: Connection timed out
May  1 08:57:28 debian ocserv[13685]: main: main.c:1266: error command
from sec-mod
May  1 08:57:28 debian ocserv[13685]: main: termination request
received; waiting for children to die
May  1 08:57:28 debian ocserv[13685]: main: 164.138.169.192:28354 user
disconnected
May  1 08:57:28 debian ocserv[13685]: main: 176.219.144.110:7146 user
disconnected
May  1 08:57:28 debian ocserv[13685]: main[trial000054]:
5.46.10.205:10745 user disconnected
May  1 08:57:28 debian ocserv[13686]: sec-mod: temporarily closing
session for trial000054 (session: LzfKW)
May  1 08:57:28 debian ocserv[17263]: worker[trial000054]: 5.46.10.205
worker-auth.c:715: error connecting to sec-mod socket
'/var/run/ocserv-socket.13685': Connection refused
May  1 08:57:28 debian ocserv[13685]: main[f****]: 37.98.89.3:60052
user disconnected
May  1 08:57:28 debian ocserv[13685]: common.c:322: Broken pipe
May  1 08:57:28 debian ocserv[13685]: main[f****]: 37.98.89.3:60052
main-sec-mod-cmd.c:327: error sending message to sec-mod cmd socket
May  1 08:57:28 debian ocserv[17163]: worker[f****]: 37.98.89.3
worker-auth.c:715: error connecting to sec-mod socket
'/var/run/ocserv-socket.13685': No such file or directory