Question 33245 in React native Question posted in
The official React Native documentation can be found here.

react native simulator can not connect server on MAC

Could not connect to development server.

Ensure the following:

  • Node server is running and available on the same network – run ‘npm start’ from react-native root
  • Node server URL is correctly set in AppDelegate
  • WiFi is enabled and connected to the same network as the Node Server

URL:
http://localhost:8081/index.bundle?platform=ios&dev=true&minify=false

RCTFatal
__28-[RCTCxxBridge handleError:]_block_invoke
_dispatch_call_block_and_release
_dispatch_client_callout
_dispatch_main_queue_callback_4CF
CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE
__CFRunLoopRun CFRunLoopRunSpecific GSEventRunModal
-[UIApplication _run] UIApplicationMain main start_sim 0x0

this error show in device simulator
Normally it work ,but today problem appear By without change my react native code

I npm start at react native root folder. Metro bundler is stuck at 99.4% when call from device simulator

My react-native. version is 0.61.2

I try solve it by many solution from google , but it not work yet.
please. suggest me

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    Connection to http://localhost:8081/debugger-proxy?role=client timed out. Are you running node proxy? If you are running on the device, check if you have the right IP address in RCTWebSocketExecutor.m.

    RCTFatal -[RCTWebSocketExecutor setUp] facebook::react::(anonymous namespace)::RCTObjcExecutor::RCTObjcExecutor(id, void (NSError*) block_pointer, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1facebook::react::ExecutorDelegate) facebook::react::(anonymous namespace)::RCTObjcExecutor::RCTObjcExecutor(id, void (NSError*) block_pointer, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1facebook::react::ExecutorDelegate) facebook::react::RCTObjcExecutorFactory::createJSExecutor(std::__1::shared_ptrfacebook::react::ExecutorDelegate, std::__1::shared_ptrfacebook::react::MessageQueueThread) (anonymous namespace)::GetDescAdapter::createJSExecutor(std::__1::shared_ptrfacebook::react::ExecutorDelegate, std::__1::shared_ptrfacebook::react::MessageQueueThread) facebook::react::NativeToJsBridge::NativeToJsBridge(facebook::react::JSExecutorFactory*, std::__1::shared_ptrfacebook::react::ModuleRegistry, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::InstanceCallback) facebook::react::NativeToJsBridge::NativeToJsBridge(facebook::react::JSExecutorFactory*, std::__1::shared_ptrfacebook::react::ModuleRegistry, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::InstanceCallback) std::__1::__unique_iffacebook::react::NativeToJsBridge::__unique_single std::__1::make_unique<facebook::react::NativeToJsBridge, facebook::react::JSExecutorFactory*, std::__1::shared_ptrfacebook::react::ModuleRegistry&, std::__1::shared_ptrfacebook::react::MessageQueueThread&, std::__1::shared_ptrfacebook::react::InstanceCallback&>(facebook::react::JSExecutorFactory*&&, std::__1::shared_ptrfacebook::react::ModuleRegistry&, std::__1::shared_ptrfacebook::react::MessageQueueThread&, std::__1::shared_ptrfacebook::react::InstanceCallback&) facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0::operator()() decltype(std::__1::forward<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0&>(fp)()) std::__1::__invoke<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0&>(facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0&) void std::__1::__invoke_void_return_wrapper<void, true>::__call<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0&>(facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0&) std::__1::__function::__alloc_func<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0, std::__1::allocator<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0>, void ()>::operator()() std::__1::__function::__func<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0, std::__1::allocator<facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry)::$_0>, void ()>::operator()() std::__1::__function::__value_func<void ()>::operator()() const std::__1::function<void ()>::operator()() const facebook::react::tryAndReturnError(std::__1::function<void ()> const&) facebook::react::RCTMessageThread::tryFunc(std::__1::function<void ()> const&) facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2::operator()() const decltype(std::__1::forward<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2&>(fp)()) std::__1::__invoke<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2&>(facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2&) void std::__1::__invoke_void_return_wrapper<void, true>::__call<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2&>(facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2&) std::__1::__function::__alloc_func<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2, std::__1::allocator<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2>, void ()>::operator()() std::__1::__function::__func<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2, std::__1::allocator<facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&)::$_2>, void ()>::operator()() std::__1::__function::__value_func<void ()>::operator()() const std::__1::function<void ()>::operator()() const facebook::react::RCTMessageThread::runSync(std::__1::function<void ()>) facebook::react::RCTMessageThread::runOnQueueSync(std::__1::function<void ()>&&) facebook::react::Instance::initializeBridge(std::__1::unique_ptr<facebook::react::InstanceCallback, std::__1::default_deletefacebook::react::InstanceCallback >, std::__1::shared_ptrfacebook::react::JSExecutorFactory, std::__1::shared_ptrfacebook::react::MessageQueueThread, std::__1::shared_ptrfacebook::react::ModuleRegistry) -[RCTCxxBridge _initializeBridgeLocked:] -[RCTCxxBridge _initializeBridge:] __21-[RCTCxxBridge start]_block_invoke.166 decltype(std::__1::forward<void () block_pointer __strong&>(fp)()) std::__1::__invoke<void () block_pointer __strong&>(&&, decltype(std::__1::forward<void () block_pointer __strong&>(fp)())&&...) void std::__1::__invoke_void_return_wrapper<void, true>::__call<void () block_pointer __strong&>(void () block_pointer __strong&) std::__1::__function::__alloc_func<void () block_pointer __strong, std::__1::allocatorstd::__1::allocator, void ()>::operator()() std::__1::__function::__func<void () block_pointer __strong, std::__1::allocatorstd::__1::allocator, void ()>::operator()() std::__1::__function::__value_func<void ()>::operator()() const std::__1::function<void ()>::operator()() const facebook::react::tryAndReturnError(std::__1::function<void ()> const&) -[RCTCxxBridge _tryAndHandleError:] __NSThreadPerformPerform CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION __CFRunLoopDoSource0 __CFRunLoopDoSources0 __CFRunLoopRun CFRunLoopRunSpecific +[RCTCxxBridge runRunLoop] NSThread__start _pthread_start thread_start

    sometime above error show at simulator


  2. 0

    i can solve this.
    reason from has below code in somefile in my project

    import { isGetAccessor } from 'typescript';

    when i rid its my project come back to work again

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