The KV data is flushed when a module fails to process a request

[Angelmmiguel]

The KV store works with snapshots. Every worker gets a fresh version and returns an edited state. Then, the KV state gets overwritten by the new one.

When a worker run returns an Error, wws generates a default WasmOutput object with a generic error. This default output includes an empty kv state that may flush the original state.

To avoid this, wws should ignore states of failed workers run or provide create aWasmOutput instance with the initial KV value.

Related code

wasm-workers-server/src/main.rs

Lines 130 to 137 in be99d39

	.unwrap_or_else(|_| {
	WasmOutput::new(
	"<p>There was an error running this function</p>",
	HashMap::from([("content-type".to_string(), "text/html".to_string())]),
	StatusCode::SERVICE_UNAVAILABLE.as_u16(),
	HashMap::new(),
	)
	});