fix(block_producer): immediately return error if lock cannot be acquired during production

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 - [2366](https://github.com/FuelLabs/fuel-core/pull/2366): The `importer_gas_price_for_block` metric is properly collected.
 - [2369](https://github.com/FuelLabs/fuel-core/pull/2369): The `transaction_insertion_time_in_thread_pool_milliseconds` metric is properly collected.
+- [2413](https://github.com/FuelLabs/fuel-core/issues/2413): block production immediately errors if unable to lock the mutex.
 
 ### Changed
 

crates/services/producer/src/block_producer.rs

@@ -115,7 +115,9 @@ where
     where
         Executor: ports::BlockProducer<Vec<Transaction>> + 'static,
     {
-        let _production_guard = self.lock.lock().await;
+        let _production_guard = self.lock.try_lock().map_err(|_| {
+            anyhow!("Failed to acquire the production lock, block production is already in progress")
+        })?;
 
         let mut transactions_source = predefined_block.transactions().to_vec();
 
@@ -185,8 +187,10 @@ where
         //      2. parallel throughput
         //  - Execute block with production mode to correctly malleate txs outputs and block headers
 
-        // prevent simultaneous block production calls, the guard will drop at the end of this fn.
-        let _production_guard = self.lock.lock().await;
+        // prevent simultaneous block production calls
+        let _production_guard = self.lock.try_lock().map_err(|_| {
+            anyhow!("Failed to acquire the production lock, block production is already in progress")
+        })?;
 
         let gas_price = self.calculate_gas_price().await?;