Ts failed to refresh, Detected termination of process tsd, Daemon ts terminated, sudden reboot
The VDX6740 recorded messages in raslog declaring "ts failed to refresh", "Detected termination of process tsd", and "Daemon ts terminated", followed by the VDX6740 suddenly rebooting itself.
The TSD (Time Service Daemon) process is waiting for the internal “system” command to complete its task. Since the internal "system" command is a blocking call, the watchdog killed the TSD process.
Resolved under DEFECT000555411 and fixed in 5.0.2b through implementation of a non-blocking version of the internal "system" command for the TSD. To avoid a recurrence of this issue it is necessary to upgrade to 5.0.2b or later.