These are the errors in the logs:
Aug 29 13:45:34 ELK-Stack.uhtasi.local systemd-entrypoint[13266]: Error occurred during initialization of boot layer
Aug 29 13:45:34 ELK-Stack.uhtasi.local systemd-entrypoint[13266]: java.lang.module.ResolutionException: Modules tools and jdk.jdi export package com.sun.jdi to module HdrHistogram
Aug 29 13:45:35 ELK-Stack.uhtasi.local systemd-entrypoint[13266]: ERROR: Elasticsearch died while starting up, with exit code 1
Help is appreciated!
You have not provided a lot of information, so there is not a lot to go on.
Did you follow the official upgrade guide available in the documentation?
Also please share any errors and context around these from the Elasticsearch logs.
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I just reverted back to pre-upgrade.
This is my current Upgrade Assistant:
I am bypassing the "Back up your data" since I am snapshotting the virtual machine on the VMware side anyway, if that's fine.
My question: Is the rolling upgrade required? Or can I just do the RPM method without doing the rolling upgrade?
That is not a supported backup method, so there is no guarantee that will work. Please see the official documentation for further details.
How many nodes do you have in the cluster?
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If you only have one node you can ignore the instructions around rolling upgrade. You will need to upgrade in place with downtime.