Log forwarding to Syslog servers stops if a TCP Syslog server becomes unresponsive when multiple syslog servers are configured.

This is the issue in environments where multiple Syslog servers are configured with both of UDP and TCP.
If the TCP Syslog server becomes unresponsive, Syslog messages are not forwarded to other servers also.

Syslog Server Profile configuration

• Palo Alto Firewalls
• PAN-OS 11.1, 11.2
• Log forwarding to Syslog server

Software Issue.

1. The issue is resolved under PAN-264102 in PAN-OS 11.1.6-h1 and 11.2.5 and above.
2. This fix will also be applied in the future versions (11.1.7/11.2.6 and above).
3. As a workaround, Remove the unresponsive TCP Syslog server from the Syslog profile.