Add logs to show deprioritization

Author: JamieTsai1024

src/client.rs

@@ -497,6 +497,15 @@ impl Client {
                 } else {
                     criteria
                 };
+
+            if operation_name == "insert" || operation_name == "find" {
+                let servers = &state.description.servers;
+                for (address, description) in servers {
+                    dbg!("address: {}", address);
+                    dbg!("type: {}", description.server_type);
+                }
+            }
+
             let result = server_selection::attempt_to_select_server(
                 effective_criteria,
                 &state.description,

src/client/executor.rs

@@ -318,6 +318,11 @@ impl Client {
                 .and_then(|s| s.transaction.pinned_mongos())
                 .or_else(|| op.selection_criteria());
 
+            if op.name() == "insert" || op.name() == "find" {
+                let first_server = retry.as_ref().map(|r| &r.first_server);
+                dbg!("deprioritized: {}", &first_server);
+            }
+
             let (server, effective_criteria) = match self
                 .select_server(
                     selection_criteria,

src/sdam/description/topology/server_selection.rs

@@ -61,7 +61,13 @@ pub(crate) fn attempt_to_select_server<'a>(
     servers: &'a HashMap<ServerAddress, Arc<Server>>,
     deprioritized: Option<&ServerAddress>,
 ) -> Result<Option<SelectedServer>> {
+    let log = deprioritized.is_some();
+
     let mut in_window = topology_description.suitable_servers_in_latency_window(criteria)?;
+    if log {
+        dbg!("in window: {}", &in_window);
+    }
+
     if let Some(addr) = deprioritized {
         if in_window.len() > 1 {
             in_window.retain(|d| &d.address != addr);