Elasticsearch error after upgrade "can not run elasticsearch as root"

Hello team,
I have update my elasticsearch data node from 7,16,3 to 7.17.5.
But it is through below error. Can you please help on same..

All files running as root.elasticsearch

[2022-08-22T18:26:40,213][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [es-data-1] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:173) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:160) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:77) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:112) ~[elasticsearch-cli-7.17.5.jar:7.17.5]
        at org.elasticsearch.cli.Command.main(Command.java:77) ~[elasticsearch-cli-7.17.5.jar:7.17.5]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:125) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:80) ~[elasticsearch-7.17.5.jar:7.17.5]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
        at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:107) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:183) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:434) ~[elasticsearch-7.17.5.jar:7.17.5]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:169) ~[elasticsearch-7.17.5.jar:7.17.5]
        ... 6 more
uncaught exception in thread [main]
java.lang.RuntimeException: can not run elasticsearch as root
        at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:107)
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:183)
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:434)
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:169)
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:160)
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:77)
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:112)
        at org.elasticsearch.cli.Command.main(Command.java:77)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:125)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:80)
For complete error details, refer to the log at /data/log/elasticsearch/enterprise-logging-uat.log

It was not possible to run elasticsearch as root in 7.16 either.
How do you start it? On which OS did you install it?

Hello @dadoonet
I am using below OS details:

NAME="Red Hat Enterprise Linux Server"
VERSION="7.9 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"

Loged in as oprroot user and than sudo su -
after that normat command like systemctl restart elasticsearch

I believe you should just run something like:

sudo systemctl restart elasticsearch