./bin/elasticsearch -version kills any running elasticsearch

[JohanRask]

From elasticsearch-6.4.3, if we run ./bin/elasticsearch -version any running elasticsearch instance seems to be killed with -9. This does did not happen before this version. We are performing a version check before update to prevent older or the same version to be installed by mistake.

Earlier, this worked and the flag was --version instead BUT we get this problem even with --version

/Johan

[Tek_Chand]

@JohanRask, you can use the below command to check the version of elasticsearch:

curl 'http://Your_Elasticserach_server_IP:9200'

Thanks.

[JohanRask]

True, we actually use that as well after install...
But it still does not make any sense to kill a running instance.

[Tek_Chand]

@JohanRask, i didn't use Elasticsearch6.4.2 or higher version. So i need to install it to replicate the issue.

Thanks.

[TimV (Tim Vernum)]

I can't reproduce this:

$ curl -u elastic:${ELASTIC_PASSWORD} 'http://localhost:9200?pretty' --silent | jq .version.number
"6.4.3"
$ ./bin/elasticsearch -version
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Version: 6.4.3, Build: default/tar/fe40335/2018-10-30T23:17:19.084789Z, JVM: 11
$ curl -u elastic:${ELASTIC_PASSWORD} 'http://localhost:9200?pretty' --silent | jq .version.number
"6.4.3"

Can you provide more details about your local setup and the precise symptoms you're seeing (log messages, etc).