Use unbounded channel (#7081)

Cargo.lock

@@ -3539,6 +3539,7 @@ dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "bzip2 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "dir-diff 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "dlopen 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "dlopen_derive 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",

core/src/banking_stage.rs

@@ -1028,10 +1028,7 @@ mod tests {
         system_transaction,
         transaction::TransactionError,
     };
-    use std::{
-        sync::{atomic::Ordering, mpsc::channel},
-        thread::sleep,
-    };
+    use std::{sync::atomic::Ordering, thread::sleep};
 
     #[test]
     fn test_banking_stage_shutdown1() {
@@ -1950,7 +1947,7 @@ mod tests {
             blocktree.insert_shreds(shreds, None, false).unwrap();
             blocktree.set_roots(&[bank.slot()]).unwrap();
 
-            let (transaction_status_sender, transaction_status_receiver) = channel();
+            let (transaction_status_sender, transaction_status_receiver) = unbounded();
             let transaction_status_service = TransactionStatusService::new(
                 transaction_status_receiver,
                 blocktree.clone(),

core/src/replay_stage.rs

@@ -1155,6 +1155,7 @@ mod test {
         replay_stage::ReplayStage,
         transaction_status_service::TransactionStatusService,
     };
+    use crossbeam_channel::unbounded;
     use solana_ledger::{
         blocktree::make_slot_entries,
         blocktree::{entries_to_test_shreds, BlocktreeError},
@@ -1759,7 +1760,7 @@ mod test {
             blocktree.insert_shreds(shreds, None, false).unwrap();
             blocktree.set_roots(&[slot]).unwrap();
 
-            let (transaction_status_sender, transaction_status_receiver) = channel();
+            let (transaction_status_sender, transaction_status_receiver) = unbounded();
             let transaction_status_service = TransactionStatusService::new(
                 transaction_status_receiver,
                 blocktree.clone(),

core/src/transaction_status_service.rs

@@ -1,11 +1,11 @@
 use crate::result::{Error, Result};
+use crossbeam_channel::{Receiver, RecvTimeoutError};
 use solana_client::rpc_request::RpcTransactionStatus;
 use solana_ledger::{blocktree::Blocktree, blocktree_processor::TransactionStatusBatch};
 use solana_runtime::bank::Bank;
 use std::{
     sync::{
         atomic::{AtomicBool, Ordering},
-        mpsc::{Receiver, RecvTimeoutError},
         Arc,
     },
     thread::{self, Builder, JoinHandle},
@@ -35,9 +35,9 @@ impl TransactionStatusService {
                     &blocktree,
                 ) {
                     match e {
-                        Error::RecvTimeoutError(RecvTimeoutError::Disconnected) => break,
-                        Error::RecvTimeoutError(RecvTimeoutError::Timeout) => (),
-                        _ => info!("Error from write_transaction_statuses: {:?}", e),
+                        Error::CrossbeamRecvTimeoutError(RecvTimeoutError::Disconnected) => break,
+                        Error::CrossbeamRecvTimeoutError(RecvTimeoutError::Timeout) => (),
+                        _ => info!("Error from write_transaction_status_batch: {:?}", e),
                     }
                 }
             })

core/src/validator.rs

@@ -19,6 +19,7 @@ use crate::{
     transaction_status_service::TransactionStatusService,
     tvu::{Sockets, Tvu},
 };
+use crossbeam_channel::unbounded;
 use solana_ledger::{
     bank_forks::{BankForks, SnapshotConfig},
     bank_forks_utils,
@@ -44,7 +45,7 @@ use std::{
     path::{Path, PathBuf},
     process,
     sync::atomic::{AtomicBool, Ordering},
-    sync::mpsc::{channel, Receiver},
+    sync::mpsc::Receiver,
     sync::{Arc, Mutex, RwLock},
     thread::Result,
 };
@@ -244,7 +245,7 @@ impl Validator {
 
         let (transaction_status_sender, transaction_status_service) =
             if rpc_service.is_some() && !config.transaction_status_service_disabled {
-                let (transaction_status_sender, transaction_status_receiver) = channel();
+                let (transaction_status_sender, transaction_status_receiver) = unbounded();
                 (
                     Some(transaction_status_sender),
                     Some(TransactionStatusService::new(

ledger/Cargo.toml

@@ -13,6 +13,7 @@ bincode = "1.2.0"
 byteorder = "1.3.2"
 bzip2 = "0.3.3"
 chrono = { version = "0.4.9", features = ["serde"] }
+crossbeam-channel = "0.3"
 dir-diff = "0.3.2"
 dlopen = "0.1.8"
 dlopen_derive = "0.1.4"

ledger/src/blocktree_processor.rs

@@ -6,6 +6,7 @@ use crate::{
     entry::{create_ticks, Entry, EntrySlice},
     leader_schedule_cache::LeaderScheduleCache,
 };
+use crossbeam_channel::Sender;
 use itertools::Itertools;
 use log::*;
 use rand::{seq::SliceRandom, thread_rng};
@@ -27,7 +28,7 @@ use solana_sdk::{
 use std::{
     cell::RefCell,
     result,
-    sync::{mpsc::Sender, Arc},
+    sync::Arc,
     time::{Duration, Instant},
 };