SRX

Routing Engine status:
    Temperature                 33 degrees C / 91 degrees F
    CPU temperature             61 degrees C / 141 degrees F
    Total memory              4096 MB Max  1270 MB used ( 31 percent)
      Control plane memory    2624 MB Max   761 MB used ( 29 percent)
      Data plane memory       1472 MB Max   500 MB used ( 34 percent)
    5 sec CPU utilization:
      User                      10 percent
      Background                 0 percent
      Kernel                     6 percent
      Interrupt                  0 percent
      Idle                      84 percent
    Model                          RE-SRX340

   Start time                     2024-09-09 15:01:34 KST
    Uptime                         1 hour, 21 minutes, 55 seconds
    Last reboot reason             0x800:reboot due to exception
    Load averages:                 1 minute   5 minute  15 minute
                                       0.14       0.21       0.18

root@EXT_VPN% sysctl hw.re.reboot_reason hw.re.reboot_reason: 1
hw.re.reboot_reason: 2048
sysctl: unknown oid 'hw.re.reboot_reason:'

There's a good chance that a memory dump was saved when the exception occurred. Check with show system core-dumps. The name of the dump file may give you a clue as to the component that caused the exception. The memory dumps can be reviewed by JTAC for further analysis.

You should also review system log messages recorded immediately before the crash as those may contain clues about events that led up to the crash.