Issue
AS-P is restarting on its own intermittently.
Product Line
EcoStruxure Building Operation
Environment
Building Operation Automation Server (All Versions)
Cause
Log entries found within the system_log.txt file confirm that the intermittent restart issue is caused by power interruption. See the below example of what to look for:
Apr 08 19:03:34 AS-P-04619A kernel: pmem: shutdown interrupt: pid=0, comm=swapper/0
Apr 08 19:03:34 AS-P-04619A kernel: [<80013920>] (unwind_backtrace+0x0/0xe0) from [<801f569c>] (pmem_shutdown_irq+0x54/0x74)
Apr 08 19:03:34 AS-P-04619A systemd-journal[1360]: Journal stopped
-- Reboot --
Apr 08 19:03:54 cpud pmem_util[656]: Found SyncBlock Partition at sector 0x5dc00, 192000 sectors long.
pmem_util[656]: ----------------------------------------------------
pmem_util[656]: SyncBlock Header summary (from previous power fail):
pmem_util[656]: Sequence number: 94
pmem_util[656]: Exit critical regions: 0ms
pmem_util[656]: SyncBlock file systems sync: 20ms
pmem_util[656]: SyncBlock write map: 0ms
pmem_util[656]: SyncBlock write speed: 6399kB/s (Wrote 128kB)
pmem_util[656]: Total power fail time: ~130ms
pmem_util[656]: ----------------------------------------------------
pmem_util[656]: Finished moving 240 sectors (120kB)
pmem_util[656]: Exit
Resolution
When an AS-P detects a power outage, regardless of how brief, it will initiate the process to backup the run-time and configuration data from memory to storage and reboots itself.
Check the power source connected to the AS-P and take appropriate actions to improve uninterrupted power delivery. An example would be to deploy a UPS solution.
