Retry command execution on concurrency error #132
Merged
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Retry executing a command if appending events to the aggregate's stream fails with an
{:error, :wrong_expected_version}
concurrency error. The missing event(s) are fetched from the event store to update the aggregate state and attempt the command again.Aggregate instances are singletons when run on a single node, or cluster if using the distributed registry, so should not fail with this error. However, the change allows Commanded to work when run on multiple nodes that are not connected to form a cluster.