Event Store upgrade 4.0.1 -> 5.0.5


We are planning an upgrade of the Event Store from version 4.0.1 to 5.0.5

We choose 5.0.5 instead of 5.0.6 due to bug: https://github.com/EventStore/EventStore/issues/2318

ES will be running on Windows Servers 2012 R2 or newer.

In my tests, it appears that 5.0.5 did not have any problems with upgrading and using ES 4.0.1 DB and our clients seem to be working without a single change (We are using c# NuGet EventStore.Client in version 4.1.0).

Anyone of you had some problems with upgrading Event Store? Should I check something? Is there anything I should be aware of?

Should there be any problems with using EventStore.Client in version 4.1.0?

Kind Regards,

Marcin B

One discovery:
When upgrading all events that are older than $maxAge will be removed.

Removing $maxAge from stream seems to fix the problem when upgrading.