Systemd-entrypoint warnings in wazuh indexer

[juliamagan]

Wazuh version	Install type	Platform
4.4.0-40402	Indexer	Amazon Linux 2 (Demo environment)

During the testing performed wazuh/wazuh#15932 (comment), we have found the following warnings:

Jan 16 09:24:09 X.X.X.X systemd-entrypoint[3335]: WARNING: A terminally deprecated method in java.lang.System has been called
Jan 16 09:24:09 X.X.X.X systemd-entrypoint[3335]: WARNING: System::setSecurityManager has been called by org.opensearch.bootstrap.Security (file:/usr/share/wazuh-indexer/lib/opensearch-2.4.1.jar)
Jan 16 09:24:09 X.X.X.X systemd-entrypoint[3335]: WARNING: Please consider reporting this to the maintainers of org.opensearch.bootstrap.Security
Jan 16 09:24:09 X.X.X.X systemd-entrypoint[3335]: WARNING: System::setSecurityManager will be removed in a future release

We have seen that this issue was created to remove these warnings from the OVA.

[alberpilot]

In order to avoid future issues in this repository I will not close this issue directly. This issue was analyzed and reported here: wazuh/wazuh#15534 and here: wazuh/wazuh#15801.

I will copy and paste the comment:

--
Regarding the 🟡 comment here: wazuh/wazuh#15534 (comment)

This is explained here: elastic/elasticsearch#80344 (comment), quoting:

Elasticsearch has used the Java Security Manager for many years now in order to limit the actions the server and the plugins can make.

The JDK maintainers proposed in JEP 411 to deprecate and remove the Security Manager. The warnings you see here are part of the deprecation message. We (Elasticsearch) are aware that the Security Manager emits such warnings starting Java 17 (which is used by elasticsearch 7.15.1).

This warning is safe to ignore. We are working on a plan to replace the deprecated methods. We are also considering ways to convey the same information but make the warning look less dire.