Oftpd lots CPU 5.2.4

Hello,

I'm having an issue on my FAZ VM64.

FortiAnalyzer-VM # execute top top_bin - 09:19:52 up 3 days, 18:11,  0 users,  load average: 4.71, 5.79, 6.68 Tasks: 187 total,   1 running, 186 sleeping,   0 stopped,   0 zombie Cpu(s):  4.6%us, 33.7%sy,  0.0%ni, 61.6%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st Mem:  16450692k total, 16312652k used,   138040k free,    74544k buffers Swap:  2076536k total,  1043740k used,  1032796k free, 12492296k cached   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND 23984 root      20   0  616m  66m 9320 S  299  0.4  53:09.05 oftpd    10 root      20   0     0    0    0 S    1  0.0   2:18.29 kworker/0:1    16 root      20   0     0    0    0 S    0  0.0   0:02.25 ksoftirqd/3    64 root      20   0     0    0    0 S    0  0.0   1:31.54 kworker/6:1

Process oftpd eating all cpu. When I debug this process I have the follow output:

diagnose debug application oftpd 99 oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully] oftps.c:521: SSL_write error rc[5] state[SSL negotiation finished successfully]

Then The logs stops to be write on FAZ, only get back when I restart the process oftpd.

Has anyone know What should be done to solve?