doc: improve worker pool example

In the worker pool example, the 'kWorkerFreedEvent' should be emitted
in case of error as well. After adding new worker in the error handler,
the pending tasks should be notified of an available worker.

PR-URL: https://github.com/nodejs/node/pull/33082
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/doc/api/async_hooks.md b/doc/api/async_hooks.md
index 5463c39bdc..0b1b22c829 100644
--- a/doc/api/async_hooks.md
+++ b/doc/api/async_hooks.md
@@ -820,6 +820,7 @@ class WorkerPool extends EventEmitter {
     });
     this.workers.push(worker);
     this.freeWorkers.push(worker);
+    this.emit(kWorkerFreedEvent);
   }
 
   runTask(task, callback) {