fix(core): disable output tracking watcher on Windows

packages/nx/src/daemon/server/outputs-tracking.spec.ts

@@ -1,7 +1,10 @@
 import { EventType } from '../../native';
 import {
+  _enableOutputsTrackingForTesting,
   _outputsHashesMatch,
   _recordOutputsHash,
+  disableOutputsTracking,
+  outputsHashesMatchBatch,
   processFileChangesInOutputs,
 } from './outputs-tracking';
 
@@ -51,4 +54,19 @@ describe('outputs tracking', () => {
     );
     expect(_outputsHashesMatch(['dist/app/app1'], '123')).toBe(true);
   });
+
+  it('should return conservative misses when output tracking is disabled', () => {
+    _recordOutputsHash(['dist/app/conservative'], 'hash');
+    disableOutputsTracking();
+
+    try {
+      expect(
+        outputsHashesMatchBatch([
+          { outputs: ['dist/app/conservative'], hash: 'hash' },
+        ])
+      ).toEqual([false]);
+    } finally {
+      _enableOutputsTrackingForTesting();
+    }
+  });
 });

packages/nx/src/daemon/server/outputs-tracking.ts

@@ -133,3 +133,7 @@ export function recordOutputsHashBatch(
 export function disableOutputsTracking() {
   disabled = true;
 }
+
+export function _enableOutputsTrackingForTesting() {
+  disabled = false;
+}

packages/nx/src/daemon/server/server.ts

@@ -744,7 +744,16 @@ export async function startServer(): Promise<Server> {
           // this triggers the storage of the lock file hash
           daemonIsOutdated();
 
-          if (!getOutputWatcherInstance()) {
+          if (isWindows) {
+            // ReadDirectoryChangesW requires a HANDLE and completion semaphore
+            // for every non-recursive directory watch. Output tracking is an
+            // optimization, so prefer conservative cache misses on Windows
+            // instead of a second workspace-wide watcher.
+            disableOutputsTracking();
+            serverLogger.watcherLog(
+              'Output tracking disabled on Windows to bound daemon HANDLE usage'
+            );
+          } else if (!getOutputWatcherInstance()) {
             storeOutputWatcherInstance(
               await watchOutputFiles(server, handleOutputsChanges)
             );