I have configured the logstash to bind 0.0.0.0:9600, after giving logstash service some time, the output of netstat -tunlpa | grep 9600 is empty
# journalctl -xe | grep logstash | tail -30
Mar 01 17:38:09 soc logstash[17986]: WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/usr/share/logstash/logstash-core/lib/jars/jruby-complete-9.2.9.0.jar) to method sun.nio.ch.NativeThread.signal(long)
Mar 01 17:38:09 soc logstash[17986]: WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
Mar 01 17:38:09 soc logstash[17986]: WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
Mar 01 17:38:09 soc logstash[17986]: WARNING: All illegal access operations will be denied in a future release
Mar 01 17:38:29 soc logstash[17986]: Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties
Mar 01 17:38:31 soc logstash[17986]: [2020-03-01T17:38:31,248][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"7.6.0"}
Mar 01 17:38:32 soc logstash[17986]: [2020-03-01T17:38:32,294][INFO ][logstash.config.source.local.configpathloader] No config files found in path {:path=>"/etc/logstash/conf.d/*.conf"}
Mar 01 17:38:32 soc logstash[17986]: [2020-03-01T17:38:32,333][ERROR][logstash.config.sourceloader] No configuration found in the configured sources.
Mar 01 17:38:32 soc logstash[17986]: [2020-03-01T17:38:32,680][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9600}
Mar 01 17:38:37 soc logstash[17986]: [2020-03-01T17:38:37,586][INFO ][logstash.runner ] Logstash shut down.
Mar 01 17:38:38 soc systemd[1]: logstash.service: Main process exited, code=exited, status=1/FAILURE
Mar 01 17:38:38 soc systemd[1]: logstash.service: Failed with result 'exit-code'.
Mar 01 17:38:38 soc systemd[1]: logstash.service: Service hold-off time over, scheduling restart.
Mar 01 17:38:38 soc systemd[1]: logstash.service: Scheduled restart job, restart counter is at 6.
-- Automatic restarting of the unit logstash.service has been scheduled, as the result for
Mar 01 17:38:38 soc systemd[1]: Stopped logstash.
-- Subject: Unit logstash.service has finished shutting down
-- Unit logstash.service has finished shutting down.
Mar 01 17:38:38 soc systemd[1]: Started logstash.
-- Subject: Unit logstash.service has finished start-up
-- Unit logstash.service has finished starting up.
Mar 01 17:38:38 soc logstash[18060]: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Mar 01 17:38:40 soc logstash[18060]: WARNING: An illegal reflective access operation has occurred
Mar 01 17:38:40 soc logstash[18060]: WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/usr/share/logstash/logstash-core/lib/jars/jruby-complete-9.2.9.0.jar) to method sun.nio.ch.NativeThread.signal(long)
Mar 01 17:38:40 soc logstash[18060]: WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
Mar 01 17:38:40 soc logstash[18060]: WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
Mar 01 17:38:40 soc logstash[18060]: WARNING: All illegal access operations will be denied in a future release
Mar 01 17:38:59 soc logstash[18060]: Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties
Mar 01 17:39:00 soc logstash[18060]: [2020-03-01T17:39:00,245][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"7.6.0"}
Mar 01 17:39:01 soc logstash[18060]: [2020-03-01T17:39:01,218][INFO ][logstash.config.source.local.configpathloader] No config files found in path {:path=>"/etc/logstash/conf.d/*.conf"}
Mar 01 17:39:01 soc logstash[18060]: [2020-03-01T17:39:01,280][ERROR][logstash.config.sourceloader] No configuration found in the configured sources.
Mar 01 17:39:01 soc logstash[18060]: [2020-03-01T17:39:01,569][INFO ][logstash.agent ] Successfully started Logstash API endpoint {:port=>9600}
Mar 01 17:39:06 soc logstash[18060]: [2020-03-01T17:39:06,463][INFO ][logstash.runner ] Logstash shut down.
Mar 01 17:39:06 soc systemd[1]: logstash.service: Main process exited, code=exited, status=1/FAILURE
Mar 01 17:39:06 soc systemd[1]: logstash.service: Failed with result 'exit-code'.
Mar 01 17:39:07 soc systemd[1]: logstash.service: Service hold-off time over, scheduling restart.
Mar 01 17:39:07 soc systemd[1]: logstash.service: Scheduled restart job, restart counter is at 7.
-- Automatic restarting of the unit logstash.service has been scheduled, as the result for
Mar 01 17:39:07 soc systemd[1]: Stopped logstash.
-- Subject: Unit logstash.service has finished shutting down
-- Unit logstash.service has finished shutting down.
Mar 01 17:39:07 soc systemd[1]: Started logstash.
-- Subject: Unit logstash.service has finished start-up
-- Unit logstash.service has finished starting up.
Mar 01 17:39:07 soc logstash[18142]: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Mar 01 17:39:08 soc logstash[18142]: WARNING: An illegal reflective access operation has occurred
Mar 01 17:39:08 soc logstash[18142]: WARNING: Illegal reflective access by com.headius.backport9.modules.Modules (file:/usr/share/logstash/logstash-core/lib/jars/jruby-complete-9.2.9.0.jar) to method sun.nio.ch.NativeThread.signal(long)
Mar 01 17:39:08 soc logstash[18142]: WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
Mar 01 17:39:08 soc logstash[18142]: WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
Mar 01 17:39:08 soc logstash[18142]: WARNING: All illegal access operations will be denied in a future release
