Fix worker execution issues

Worker stream now properly terminated on action complete.

nativelink-scheduler/src/scheduler_state/workers.rs

@@ -176,7 +176,15 @@ impl ApiWorkerSchedulerImpl {
             }
         }
 
-        // Clear this action from the current worker.
+        // We are done if the action is not finished or there was an error.
+        let is_finished = action_stage
+            .as_ref()
+            .map_or_else(|_| true, |action_stage| action_stage.is_finished());
+        if !is_finished {
+            return Ok(());
+        }
+
+        // Clear this action from the current worker if finished.
         let complete_action_res = {
             let was_paused = !worker.can_accept_work();
 
@@ -193,7 +201,6 @@ impl ApiWorkerSchedulerImpl {
             complete_action_res
         };
 
-        // TODO(allada) This should move to inside the Workers struct.
         self.worker_change_notify.notify_one();
 
         complete_action_res
@@ -228,6 +235,14 @@ impl ApiWorkerSchedulerImpl {
                 return Result::<(), _>::Err(err.clone())
                     .merge(self.immediate_evict_worker(&worker_id, err).await);
             }
+        } else {
+            event!(
+                Level::WARN,
+                ?worker_id,
+                ?operation_id,
+                ?action_info,
+                "Worker not found in worker map in worker_notify_run_action"
+            );
         }
         Ok(())
     }

nativelink-service/src/execution_server.rs

@@ -222,9 +222,15 @@ impl ExecutionServer {
                             let client_operation_id = ClientOperationId::from_raw_string(
                                 client_operation_id_string.clone(),
                             );
+                            // If the action is finished we won't be sending any more updates.
+                            let maybe_action_listener = if action_update.stage.is_finished() {
+                                None
+                            } else {
+                                Some(action_listener)
+                            };
                             Some((
                                 Ok(action_update.as_operation(client_operation_id)),
-                                Some(action_listener),
+                                maybe_action_listener,
                             ))
                         }
                         Err(err) => {