ns.log:
Mar  9 22:29:11 <local0.info> gash-vpx-uat2 nssync:  NSSYNC: SYNC started ....
Mar  9 22:29:11 <local0.notice> 10.168.253.225 03/09/2023:14:29:11 GMT gash-vpx-uat2 0-PPE-0 : default EVENT STATECHANGE 4713434 0 :  Device "self node 10.168.253.225" - State "SYNC start"
Mar  9 22:29:12 <local0.info> gash-vpx-uat2 nssync: Send HA File sync to netsvc
Mar  9 22:29:14 <local0.info> 10.168.253.225 03/09/2023:14:29:14 GMT gash-vpx-uat2 0-PPE-0 : default API CMD_EXECUTED 4713436 0 :  User nsroot - Remote_ip 10.168.253.231 - Command "stat ns" - Status "Success"
Mar  9 22:29:20 <local0.crit> gash-vpx-uat2 nsconf: child exited with status of 0
Mar  9 22:29:20 <local0.err> gash-vpx-uat2 /netscaler/auto_update_urlset: Could not open /var/download/mapping-urlset.
Mar  9 22:29:20 <local0.info> 10.168.253.225 03/09/2023:14:29:20 GMT gash-vpx-uat2 0-PPE-0 : default SSLVPN Message 4713441 0 :  "ns_addrm_homepagedbs_svc : Returning because homepagelen 0 nsconf_read_end 1 "
Mar  9 22:29:20 <local0.info> 10.168.253.225 03/09/2023:14:29:20 GMT gash-vpx-uat2 0-PPE-0 : default SSLVPN Message 4713442 0 :  "ns_addrm_homepagedbs_svc : Returning because homepagelen 0 nsconf_read_end 1 "
Mar  9 22:29:20 <local0.info> 10.168.253.225 03/09/2023:14:29:20 GMT gash-vpx-uat2 0-PPE-0 : default PITBOSS1 Message 0 0 :  "Thu Mar  9 22:29:20 2023 pb_op_longer_hb for critical process NSPPE-00 (1285) 150 secs"
Mar  9 22:29:20 <local0.err> gash-vpx-uat2 [1360]: _dispatch(): Invalid password
Mar  9 22:29:20 <local0.info> gash-vpx-uat2 [1360]: _dispatch():   Failing command: "add ssl certKey ns-sftrust-certificate -cert ns-sftrust.cert -key ns-sftrust.key"

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Instructions

Please note that the highlighted msg “pb_op_longer_hb for critical process“is not an error message but an informational logging.
I will explain and start with the pitboss and PPE. Pitboss is a watchdog like process that periodically monitors Packet Processing Engine, that is the NSPPE. As you know, NSPPE is the process that is responsible for packet processing on Netscaler.
The Pitboss increases the PPE(packet processing engine) heartbeat interval to critical process NSPPE during sync. By default it is 1 sec but it is increased to 150 secs during HA sync. And thus, you will see the message logging. This is to avoid losing pitboss heartbeats when HA sync happens as NSPPE might get busy in sync operations. We will suggest customer simply ignore the message logging.