This message was deleted.

Have you checked /var/log/messages for those times? If it’s a system issue you may find some clues there Possible a packet engine is crashing - check /var/core for files generated around the time you see these events I have a number of appliances with different configs on this build and not had any issues so far

Thank you for your suggestion, I couldn’t see core dumps but looks like that’s Packet Engine -not dying completely but freezing for a brief moment. Might be caused by appflow policies pointing to dead MAS servers. We will also add more CPUs to increase PE count just in case. That’s what I could see in messages. Feb 18 121427 <local0.warn> NRDCTXNSP01 aslearn[2658]: Unable to send the command NSAPI_GET_MASTER_IP; ErrorCode=0x1 Feb 18 121427 <local0.err> NRDCTXNSP01 aslearn[2658]: Error ioctl() failed, error code = 1024 , reason: Inappropriate ioctl for device Feb 18 121431 <local0.warn> NRDCTXNSP01 nsfsyncd: Unable to send the command NSAPI_GET_MASTER_IP; ErrorCode=0x1 Feb 18 121431 <local0.crit> NRDCTXNSP01 nsfsyncd: NSFSYNCD: The command NSAPI_GET_MASTER_IP failed with ErrorCode=0x400 from packet engine; will try again later. Feb 18 121444 <local0.warn> NRDCTXNSP01 [1437]: Unable to send the command NSAPI_SNMP_REQUEST; ErrorCode=0x1 Feb 18 121525 <local0.err> NRDCTXNSP01 sshd[15651]: Error connecting to PE0: Connection failed Feb 18 121525 <local0.err> NRDCTXNSP01 sshd[15652]: Error connecting to PE0: Connection failed Feb 18 121525 <local0.err> NRDCTXNSP01 sshd[15653]: Error connecting to PE0: Connection failed Feb 18 121541 <local0.warn> NRDCTXNSP01 nsfsyncd: Unable to send the command NSAPI_GET_MASTER_IP; ErrorCode=0x1 Feb 18 121541 <local0.crit> NRDCTXNSP01 nsfsyncd: NSFSYNCD: The command NSAPI_GET_MASTER_IP failed with ErrorCode=0x400 from packet engine; will try again later. Feb 18 121543 <local0.warn> NRDCTXNSP01 aslearn[2658]: Unable to send the command NSAPI_GET_MASTER_IP; ErrorCode=0x1 Feb 18 121543 <local0.err> NRDCTXNSP01 aslearn[2658]: Error ioctl() failed, error code = 1024 , reason: Inappropriate ioctl for device Feb 18 121545 <local0.warn> NRDCTXNSP01 [1437]: Unable to send the command NSAPI_SNMP_REQUEST; ErrorCode=0x1 Feb 18 121547 <auth.err> NRDCTXNSP01 sshd[15652]: error: Connection refused