The problem is in my module mod_asis.so
Open file in /proc/$PID/fd/ and don't close open file.

lrwx------ 1 nobody nogroup 64 Jul 30 12:34 940 -> socket:[32218310]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 941 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 942 -> socket:[32412519]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 943 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 944 -> socket:[32412811]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 945 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 946 -> socket:[32553372]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 947 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 948 -> socket:[32553550]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 949 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 95 -> socket:[4124090]
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 950 -> socket:[32612870]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 951 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 952 -> socket:[32613037]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 953 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 954 -> socket:[32645073]
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 955 -> socket:[32644536]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 956 -> /var/wwwns/index.asis
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 957 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 958 -> socket:[34881080]
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 959 -> socket:[34689086]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 96 -> /var/wwwns/index.asis
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 960 -> /var/wwwns/index.asis
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 963 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 97 -> socket:[4123881]
lr-x------ 1 nobody nogroup 64 Jul 30 12:34 98 -> /var/wwwns/index.asis
lrwx------ 1 nobody nogroup 64 Jul 30 12:34 99 -> socket:[4165546]

There is a problem.
Where a bug ?
Help