Error running Logstash 7.16.1 OSS

[BenSeb (Ben Sebborn)]

We're getting the following errors when trying to run 7.16.1 OSS

[2021-12-13T14:53:22,775][INFO ][logstash.runner          ] Log4j configuration path used is: /etc/logstash/log4j2.properties
[2021-12-13T14:53:22,790][INFO ][logstash.runner          ] Starting Logstash {"logstash.version"=>"7.16.1", "jruby.version"=>"jruby 9.2.20.1 (2.5.8) 2021-11-30 2a2962fbd1 OpenJDK 64-Bit Server VM 11.0.13+8 on 11.0.13+8 +indy +jit [linux-x86_64]"}
[2021-12-13T14:53:22,833][FATAL][org.logstash.Logstash    ] Logstash stopped processing because of an error: (SystemExit) exit
org.jruby.exceptions.SystemExit: (SystemExit) exit
	at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:747) ~[jruby-complete-9.2.20.1.jar:?]
	at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:710) ~[jruby-complete-9.2.20.1.jar:?]
	at usr.share.logstash.lib.bootstrap.environment.<main>(/usr/share/logstash/lib/bootstrap/environment.rb:94) ~[?:?]

The error doesn't really give us any info to help debug the issue?

[BenSeb (Ben Sebborn)]

I get the same running manually:

[ec2-user@ip-10-0-2-177 conf.d]$ sudo /usr/share/logstash/bin/logstash -f . --path.settings /etc/logstash/
Using bundled JDK: /usr/share/logstash/jdk
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release
Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties
[2021-12-13T14:59:35,445][INFO ][logstash.runner          ] Log4j configuration path used is: /etc/logstash/log4j2.properties
[2021-12-13T14:59:35,462][INFO ][logstash.runner          ] Starting Logstash {"logstash.version"=>"7.16.1", "jruby.version"=>"jruby 9.2.20.1 (2.5.8) 2021-11-30 2a2962fbd1 OpenJDK 64-Bit Server VM 11.0.13+8 on 11.0.13+8 +indy +jit [linux-x86_64]"}
Your settings are invalid. Reason: Setting "xpack.monitoring.enabled" hasn't been registered
[2021-12-13T14:59:35,506][FATAL][org.logstash.Logstash    ] Logstash stopped processing because of an error: (SystemExit) exit
org.jruby.exceptions.SystemExit: (SystemExit) exit
	at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:747) ~[jruby-complete-9.2.20.1.jar:?]
	at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:710) ~[jruby-complete-9.2.20.1.jar:?]
	at usr.share.logstash.lib.bootstrap.environment.<main>(/usr/share/logstash/lib/bootstrap/environment.rb:94) ~[?:?]
[ec2-user@ip-10-0-2-177 conf.d]$ 

[Badger]

@BenSeb

xpack.monitoring.enabled

I think that is deprecated, in which case this PR may be related.