react native simulator can not connect server on MAC - ios

Question

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

Answer 1

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

Answer 2

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