message: accumulator: Optimize log level
diff: @@ -305,7 +305,7 @@ impl AccumulatorTree {
  .lock()
  .put(NodeCacheKey::new(self.id, index), node_hash)
  {
  - warn!(
  + trace!(
  "save node index cache exist: {:?}-{:?}-{:?}",
  self.id.short_str(),
  index,
  