Upgrading OpenJDK

1. Describe your incident:
Upgrading OpenJDK from 8 to 17

2. Describe your environment:

  • OS Information: Ubuntu 18.04

  • Package Version: Graylog 4.3.2, Elasticsearch 7.10.2, Mongo 4.2.20

  • Service logs, configurations, and environment variables: Note, HTTPS is enabled and functioning.

3. What steps have you already taken to try and solve the problem? N/A

4. How can the community help?

I would like to upgrade openJDK from the current version 8, which was the norm when I first install Graylog. I would like to upgrade to 17, as that seems to be the suggested versions in the documentation.

  1. Do I simply install the 17 and run “update-alternatives --config java” option?
  2. Do I need to do anything else?
  3. Any problems with the current custom certificate store to worry about?
  4. This doesn’t cause any issues with Elasticsearch, which indicates that 7.10.2 is only fully supported to java 15? I’m assuming not, but just checking.

Thanking anyone who answers in advance.

Hello @cttjern

Depending on this environment you may need to adjust you $JAVA_HOME. If you using the default java keystore “cacerts” you may need to adjust that also.

You could test this out in a none production environment. I have JAVA 11 unfortunately I have no need to increase the version yet.

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