After upgrading Logstash to version 6.4.1 using the package managers procedure bellow :
Logstash version has changed successfully to 6.4.1 using ./logstash -V command , but did't show up on kibana logstash list.
So I enabled the debug mode on logstash.yml file and got this message Error telling me that there is more than one instance on my server :
[2018-09-26T15:05:17,514][FATAL][logstash.runner] Logstash could not be started because there is already another instance using the configured data directory. If you wish to run multiple instances, you must change the "path.data" setting.
[2018-09-26T15:05:17,539][ERROR][org.logstash.Logstash] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
Knowing that i did't configure multiple instances of logstash and i have only one logstash.yml file and one path.data specified in it.
need your help please