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mvianello
Staff
Staff
November 26, 2025

Troubleshooting Tip: FortiManager CPU spikes on deamon ptsessionmgrd

  • November 26, 2025
  • 0 replies
  • 269 views
Description This article describes how to deal with FortiManager CPU 100% spikes and crashes due to ptsessionmgrd deamon on FortiManager 7.2.10.
Scope FortiManager 7.2.10.
Solution

After upgrading to FortiManager 7.2.10, the daemon /bin/ptsessionmgrd CPU usage randomly spikes to 100% and crashes.

 

To verify the FortiManager is hitting this bug:

 

  • Check the CPU usage:

exe top -b -n 1   top - 14:14:12 up 1 day,  6:21,  0 users,  load average: 1.81, 1.75, 1.55 Tasks: 220 total,   3 running, 215 sleeping,   0 stopped,   2 zombie %Cpu(s): 13.1 us, 11.1 sy,  0.0 ni, 73.7 id,  0.0 wa,  0.0 hi,  2.0 si,  0.0 st MiB Mem :  32125.9 total,  12470.8 free,  17024.4 used,   2630.7 buff/cache MiB Swap:   2048.0 total,      2.8 free,   2045.2 used.  14650.3 avail Mem     PID USER      PR  NI    VIRT    RES  %CPU  %MEM     TIME+ S COMMAND 20278 root      20   0   67.3m  11.3m 100.0   0.0   1191:18 R /bin/ptsessionmg+  <-----  1052 root      20   0  227.9m  93.8m  20.0   0.3  81:46.26 R fds_worker  9720 apache    20   0    0.0m   0.0m  13.3   0.0   0:00.04 Z [httpd] <defunct>  1025 root      20   0  533.5m 409.3m   6.7   1.3  26:03.60 S fds_svrd

 

  • Check the crashlog:

diag debug crash read  2025-02-20 18:04:24 Firmware FMG-VM64 v7.2.10-build1682 250211 (GA) 2025-02-20 18:04:24 Application ptsessionmgrd 2025-02-20 18:04:24 Signal 6 (Aborted) 2025-02-20 18:04:24 Pid 950 ppid 1 backtrace: 2025-02-20 18:04:24 [0x7f57a5f1731c]  libsegfault.so  +0x131c  print_trace+0x37/0x179 2025-02-20 18:04:24 [0x7f57a5f17506]  libsegfault.so  +0x1506  catch_segfault+0xa8/0x120 2025-02-20 18:04:24 [0x7f57a343b910]  libc.so.6  +0x38910 2025-02-20 18:04:24 [0x7f57a343b891]  libc.so.6  +0x38891  gsignal+0x141/0x179 2025-02-20 18:04:24 [0x7f57a342555b]  libc.so.6  +0x2255b  abort+0x127/0x21c 2025-02-20 18:04:24 [0x7f57a347e0d8]  libc.so.6  +0x7b0d8 2025-02-20 18:04:24 [0x7f57a348544a]  libc.so.6  +0x8244a 2025-02-20 18:04:24 [0x7f57a348726d]  libc.so.6  +0x8426d 2025-02-20 18:04:24 [0x562bfdb779e6]  ptsessionmgrd  +0x59e6 2025-02-20 18:04:24 [0x562bfdb769ce]  ptsessionmgrd  +0x49ce  main+0x28e/0x2b8 2025-02-20 18:04:24 [0x7f57a3426deb]  libc.so.6  +0x23deb  __libc_start_main+0xeb/0x1be 2025-02-20 18:04:24 [0x562bfdb76aca]  ptsessionmgrd  +0x4aca 2025-02-20 18:04:24   

 

This is a well-known issue on FortiManager 7.2.10 fixed on 7.4.7 and 7.6.4.