Logstash Error: "Your settings are invalid"

Elastic Stack Logstash
1

Hi guys,

I just upgraded elk stack from 7.15.0 to 7.16.0.

Everything is working fine except Logstash.

It ends up failing to start. I checked the system logs and found the following error.

Error:

logstash[20212]: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
logstash[20212]: Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties
logstash[20212]: [2021-12-12T02:43:59,474][INFO ][logstash.runner          ] Log4j configuration path used is: /etc/logstash/log4j2.properties
logstash[20212]: [2021-12-12T02:43:59,486][INFO ][logstash.runner          ] Starting Logstash {"logstash.version"=>"7.16.0", "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]"}
logstash[20212]: Your settings are invalid. Reason: super: no superclass method `validate' for #<LogStash::Setting::DeprecatedAlias:0x7488db31>
logstash[20212]: [2021-12-12T02:43:59,519][FATAL][org.logstash.Logstash    ] Logstash stopped processing because of an error: (SystemExit) exit
logstash[20212]: org.jruby.exceptions.SystemExit: (SystemExit) exit
logstash[20212]: #011at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:747) ~[jruby-complete-9.2.20.1.jar:?]
logstash[20212]: #011at org.jruby.RubyKernel.exit(org/jruby/RubyKernel.java:710) ~[jruby-complete-9.2.20.1.jar:?]
logstash[20212]: #011at usr.share.logstash.lib.bootstrap.environment.<main>(/usr/share/logstash/lib/bootstrap/environment.rb:94) ~[?:?]
systemd[1]: logstash.service: Main process exited, code=exited, status=1/FAILURE
systemd[1]: logstash.service: Failed with result 'exit-code'.
systemd[1]: logstash.service: Service hold-off time over, scheduling restart.
systemd[1]: logstash.service: Scheduled restart job, restart counter is at 14.
systemd[1]: Stopped logstash.

The 0x7488db31 keeps changing at every restart try.

I tired to downgrade Logstash to 7.15.0 and it works fine. The error only shows up at 7.16.0

Please help me figure out as to what is happening.

Regards,
Neerajkumar G.

2

Perhaps you have http.enabled in your logstash.yml and you need to change that to api.enabled. See this PR.

3

Hi Badger,

This worked like a charm!!

Thanks a ton for your help!!

4

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