Cannot start ES after upgrading from 7.x to 8.x

Elastic Stack Elasticsearch
1

This is the error in my journalctl:

Sep 20 11:39:43 ELK-Stack.uhtasi.local systemd[1]: Starting Elasticsearch...
Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd-entrypoint[29322]: Error occurred during initialization of boot layer
Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd-entrypoint[29322]: java.lang.module.ResolutionException: Modules jdk.compiler and tools export package com.sun.tools.javac to module com.sun.jna
Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd-entrypoint[29322]: ERROR: Elasticsearch exited unexpectedly, with exit code 1
Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd[1]: elasticsearch.service: main process exited, code=exited, status=1/FAILURE
Sep 20 11:39:50 ELK-Stack.uhtasi.local systemd[1]: Failed to start Elasticsearch.

If anyone can help

2

Could you share Elasticsearch full logs please?

3

Did you first upgrade to version 7.17 as outlined in the documentation?

4

Yes I resolved the issues in Upgrade Assistant prior to upgrading.

5

It seems my elasticsearch.log actually isn't even being updated.