Warnings with Logstash 7.6

[jotanavarro]

I am getting these warning messages when installing the plugin for a Logstash 7.6 in Docker:

Step 3/12 : RUN logstash-plugin install logstash-input-kinesis
 ---> Running in 79c3f0e475d9
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.headius.backport9.modules.Modules to method sun.nio.ch.NativeThread.signal(long)
WARNING: Please consider reporting this to the maintainers of com.headius.backport9.modules.Modules
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Validating logstash-input-kinesis
Installing logstash-input-kinesis
Installation successful
Removing intermediate container 79c3f0e475d9

Plugins install, for now, but this may require some attention before it breaks.