Ok, yeah, the functionality to send to multiple simulataneously doesn't exist, the developers would need to add it, I've created a feature request here: FR: XI - Add the ability to send to multiple SMTP servers (not just failover, but the ability to send a single email through multiple SMTP servers ...

For clarification, are you trying for redundancy (if the first fails, try the second) or for relaying the same email through two different servers (email sent to 2 different email systems)? In XI it also depends on whether or not you are using XI's notification handler or using the backend postfix/s...

You should be using the SNMP Trap Sender component for this as I don't think this will work as expected, are you running this as an event handler or how are you running it? Please send me a copy of your profile so that we can review how you have this configured, you can download it from Admin > Syst...

You can show us the nagios.log entries for the host AND this hosts services (after the upgrade) so that we can see what exactly is occurring (we need to see all HARD/SOFT states for BOTH the HOST AND the SERVICES over this timeperiod so that we can see what state they are all in when things occur). ...

What is the output of this command?

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ls -l /apps/wildfly-11.0.0/standalone/log/server.log.2019-07-11

Try this instead: cd /usr/local/nagios/libexec/ ./check_snmp_int.pl cp check_snmp_netint.pl /usr/local/nagios/libexec/ chmod 775 /usr/local/nagios/libexec/check_snmp_netint.pl chown apache:nagios /usr/local/nagios/libexec/check_snmp_netint.pl Or you can run it directly like this: /usr/local/nagios/l...

What does this output?

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/usr/local/nagios/libexec/check_disk -w 90% -c 95% -p /dev/hd10opt

Sounds like you need to set is_volatile to 1 on the service, see here:

https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/volatileservices.html

What does this output?

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su - nagios
/usr/local/nagios/libexec/check_dhcp -v -u -i ens192 -s 172.27.27.104
/usr/local/nagios/libexec/check_dhcp -v -i ens192


It tells you the issue: ./check_log: line 209: /apps/wildfly-11.0.0/standalone/log/server.log: Permission denied The nagios user doesn't have access to write to this file: /apps/wildfly-11.0.0/standalone/log/server.log What are the permissions on there? ls -l /apps/wildfly-11.0.0/standalone/log/serv...