Wasm VM corruption on plugin config update #125
Description
context: istio/istio#29843
When reconfigure a plugin, VM could be stuck at a bad state:
2021-02-04T22:06:29.003338Z trace envoy wasm [host->vm] proxy_on_request_headers(6, 10, 1)
2021-02-04T22:06:29.003479Z error envoy wasm Function: proxy_on_request_headers failed: Uncaught RuntimeError: function signature mismatch
This happen randomly to some VMs at an Envoy process, so looks like vm is corrupted due to config update.