Pass QueryEngineFactory by reference #6331
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Signed-off-by: Sebastian Rabenhorst <sebastian.rabenhorst@shopify.com> Cleanup Signed-off-by: Sebastian Rabenhorst <sebastian.rabenhorst@shopify.com>
Signed-off-by: Sebastian Rabenhorst <sebastian.rabenhorst@shopify.com>
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Using both the GRPC and HTTP query API of one querier results in
duplicate metrics collector registration attempted. This happens because the queryEngineFactory is currently passed by value, so there will be two instances of the factory resulting in two engines being created when using both the GRPC and HTTP query API of the same querier. Since both engines will register the same metrics we get the duplication error. To fix this we change to passing the engine factory by reference in this PR.