Remove .with_current_subscriber() calls

Those calls were introduced in e557095,
with message:
```
Now, when the driver spawns a task to run a new future on it, that
future will use the same subscriber as the code that spawned the task in
the first place.
```

There is unfortunately no explanation about when it is necessary.
I don't see any problems after removing those - logs are still collected
correctly using a tracing subscriber.
Those calls however have a harmful side-effect: they prevent usage of
`log` loggers to listen to driver logs using `log` feature in `tracing`
crate. After reporting the problem to `tracing` crate:
tokio-rs/tracing#2913
one of maintainers said that using `.with_current_subscriber()` in
a library is not necessary in general.

As I don't see any issue caused by removing these calls, but their
existence cause an issue, they are removed in this commit.

scylla-proxy/examples/cmdline.rs

@@ -13,7 +13,6 @@ use std::{
 };
 
 use scylla_proxy::{Node, Proxy, ShardAwareness};
-use tracing::instrument::WithSubscriber;
 
 fn init_logger() {
     tracing_subscriber::fmt::fmt()
@@ -53,7 +52,7 @@ async fn main() {
         None,
         None,
     )]);
-    let running_proxy = proxy.run().with_current_subscriber().await.unwrap();
+    let running_proxy = proxy.run().await.unwrap();
 
     pause().await;
     running_proxy.finish().await.unwrap();

scylla-proxy/examples/identity_proxy.rs

@@ -1,7 +1,6 @@
 use std::{net::SocketAddr, str::FromStr};
 
 use scylla_proxy::{Node, Proxy, ShardAwareness};
-use tracing::instrument::WithSubscriber;
 
 fn init_logger() {
     tracing_subscriber::fmt::fmt()
@@ -30,7 +29,7 @@ async fn main() {
                 .build(),
         )
         .build();
-    let running_proxy = proxy.run().with_current_subscriber().await.unwrap();
+    let running_proxy = proxy.run().await.unwrap();
 
     pause().await;
     running_proxy.finish().await.unwrap();

scylla-proxy/examples/identity_shard_aware_proxy.rs

@@ -1,7 +1,6 @@
 use std::{net::SocketAddr, str::FromStr};
 
 use scylla_proxy::{Node, Proxy, ShardAwareness};
-use tracing::instrument::WithSubscriber;
 
 fn init_logger() {
     tracing_subscriber::fmt::fmt()
@@ -27,7 +26,7 @@ async fn main() {
         None,
         None,
     )]);
-    let running_proxy = proxy.run().with_current_subscriber().await.unwrap();
+    let running_proxy = proxy.run().await.unwrap();
 
     pause().await;
     running_proxy.finish().await.unwrap();

scylla/src/transport/cluster.rs

@@ -24,7 +24,6 @@ use std::collections::{HashMap, HashSet};
 use std::net::SocketAddr;
 use std::sync::Arc;
 use std::time::Duration;
-use tracing::instrument::WithSubscriber;
 use tracing::{debug, warn};
 use uuid::Uuid;
 
@@ -206,7 +205,7 @@ impl Cluster {
         };
 
         let (fut, worker_handle) = worker.work().remote_handle();
-        tokio::spawn(fut.with_current_subscriber());
+        tokio::spawn(fut);
 
         let result = Cluster {
             data: cluster_data,
@@ -647,7 +646,7 @@ impl ClusterWorker {
 
                             let cluster_data = self.cluster_data.load_full();
                             let use_keyspace_future = Self::handle_use_keyspace_request(cluster_data, request);
-                            tokio::spawn(use_keyspace_future.with_current_subscriber());
+                            tokio::spawn(use_keyspace_future);
                         },
                         None => return, // If use_keyspace_channel was closed then cluster was dropped, we can stop working
                     }

scylla/src/transport/connection.rs

@@ -13,7 +13,6 @@ use tokio::io::{split, AsyncRead, AsyncWrite, AsyncWriteExt, BufReader, BufWrite
 use tokio::net::{TcpSocket, TcpStream};
 use tokio::sync::{mpsc, oneshot};
 use tokio::time::Instant;
-use tracing::instrument::WithSubscriber;
 use tracing::{debug, error, trace, warn};
 use uuid::Uuid;
 
@@ -1090,7 +1089,7 @@ impl Connection {
                 node_address,
             )
             .remote_handle();
-            tokio::task::spawn(task.with_current_subscriber());
+            tokio::task::spawn(task);
             return Ok(handle);
         }
 
@@ -1104,7 +1103,7 @@ impl Connection {
             node_address,
         )
         .remote_handle();
-        tokio::task::spawn(task.with_current_subscriber());
+        tokio::task::spawn(task);
         Ok(handle)
     }
 

scylla/src/transport/connection_pool.rs

@@ -27,7 +27,6 @@ use std::sync::{Arc, RwLock, Weak};
 use std::time::Duration;
 
 use tokio::sync::{broadcast, mpsc, Notify};
-use tracing::instrument::WithSubscriber;
 use tracing::{debug, error, trace, warn};
 
 /// The target size of a per-node connection pool.
@@ -212,7 +211,7 @@ impl NodeConnectionPool {
 
         let conns = refiller.get_shared_connections();
         let (fut, refiller_handle) = refiller.run(use_keyspace_request_receiver).remote_handle();
-        tokio::spawn(fut.with_current_subscriber());
+        tokio::spawn(fut);
 
         Self {
             conns,
@@ -1138,17 +1137,14 @@ impl PoolRefiller {
             Err(QueryError::IoError(io_error.unwrap()))
         };
 
-        tokio::task::spawn(
-            async move {
-                let res = fut.await;
-                match &res {
-                    Ok(()) => debug!("[{}] Successfully changed current keyspace", address),
-                    Err(err) => warn!("[{}] Failed to change keyspace: {:?}", address, err),
-                }
-                let _ = response_sender.send(res);
+        tokio::task::spawn(async move {
+            let res = fut.await;
+            match &res {
+                Ok(()) => debug!("[{}] Successfully changed current keyspace", address),
+                Err(err) => warn!("[{}] Failed to change keyspace: {:?}", address, err),
             }
-            .with_current_subscriber(),
-        );
+            let _ = response_sender.send(res);
+        });
     }
 
     // Requires the keyspace to be set

scylla/src/transport/iterator.rs

@@ -16,7 +16,6 @@ use scylla_cql::types::serialize::row::SerializedValues;
 use std::result::Result;
 use thiserror::Error;
 use tokio::sync::mpsc;
-use tracing::instrument::WithSubscriber;
 
 use super::errors::QueryError;
 use super::execution_profile::ExecutionProfileInner;
@@ -387,7 +386,7 @@ impl RowIterator {
         worker_task: impl Future<Output = PageSendAttemptedProof> + Send + 'static,
         mut receiver: mpsc::Receiver<Result<ReceivedPage, QueryError>>,
     ) -> Result<RowIterator, QueryError> {
-        tokio::task::spawn(worker_task.with_current_subscriber());
+        tokio::task::spawn(worker_task);
 
         // This unwrap is safe because:
         // - The future returned by worker.work sends at least one item

scylla/src/transport/load_balancing/default.rs

@@ -2269,7 +2269,7 @@ mod latency_awareness {
     use itertools::Either;
     use scylla_cql::errors::{DbError, QueryError};
     use tokio::time::{Duration, Instant};
-    use tracing::{instrument::WithSubscriber, trace, warn};
+    use tracing::{trace, warn};
     use uuid::Uuid;
 
     use crate::{load_balancing::NodeRef, routing::Shard, transport::node::Node};
@@ -2454,7 +2454,7 @@ mod latency_awareness {
                 }
             }
             .remote_handle();
-            tokio::task::spawn(updater_fut.with_current_subscriber());
+            tokio::task::spawn(updater_fut);
 
             Self {
                 _updater_handle: Some(updater_handle),

scylla/tests/integration/utils.rs

@@ -3,7 +3,6 @@ use std::collections::HashMap;
 use std::env;
 use std::net::SocketAddr;
 use std::str::FromStr;
-use tracing::instrument::WithSubscriber;
 
 use scylla_proxy::{Node, Proxy, ProxyError, RunningProxy, ShardAwareness};
 
@@ -53,7 +52,7 @@ where
     );
 
     let translation_map = proxy.translation_map();
-    let running_proxy = proxy.run().with_current_subscriber().await.unwrap();
+    let running_proxy = proxy.run().await.unwrap();
 
     let running_proxy = test(
         [proxy1_uri, proxy2_uri, proxy3_uri],