Make MillBuildServer#evaluatorRequestsThread a daemon thread (#5967)

lihaoyi · web-flow · commit e9b351acc209 · 2025-10-13T09:12:16.000+08:00
Attempts to fix #5771, where it appears this thread is hanging around preventing proper process shutdown
diff --git a/runner/bsp/worker/src/mill/bsp/worker/MillBuildServer.scala b/runner/bsp/worker/src/mill/bsp/worker/MillBuildServer.scala
@@ -892,6 +892,8 @@ private class MillBuildServer(
         }
     }
 
+  // Make this a daemon thread so if the main thread exits this doesn't keep the process alive
+  evaluatorRequestsThread.setDaemon(true)
   evaluatorRequestsThread.start()
 
   protected def handlerEvaluators[V](

Original file line number	Diff line number	Diff line change
`@@ -892,6 +892,8 @@ private class MillBuildServer(`
`892`	`892`	`}`
`893`	`893`	`}`
`894`	`894`
	`895`	`+ // Make this a daemon thread so if the main thread exits this doesn't keep the process alive`
	`896`	`+ evaluatorRequestsThread.setDaemon(true)`
`895`	`897`	`evaluatorRequestsThread.start()`
`896`	`898`
`897`	`899`	`protected def handlerEvaluators[V](`