[Bugs] [Bug 1687051] gluster volume heal failed when online upgrading from 3.12 to 5.x and when rolling back online upgrade from 4.1.4 to 3.12.15

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1687051



--- Comment #67 from Sanju <srakonde at redhat.com> ---
Amgad,

Did you change your op-version after downgrading node? If you're performing a
downgrade you need to manually edit the op-version to a lesser op-version in
glusterd.info file in all machines and restart glusterd's. So that glusterd
will run with lower op-version. You can't set lower op-version using volume set
operation.

and, I would like to mention that, we can't promise anything about downgrade as
we don't test/support downgrades. If you are going forward and performing a
downgrade, I suggest you to perform a offline downgrade. After the downgrade,
you should manually edit op-version in glusterd.info file and restart glusterd.
After doing this also, things might go wrong as it is not something tested and
supported.

Thanks,
Sanju

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