响应本机端口8081已经在使用，packager要么没有运行，要么没有运行正确的命令/bin/sh失败的退出代码2。

I'm trying to get up and running with react native and I am seeing the below message in xcode. I went to the react native Troubleshooting page and tried to kill port 8081 process, but I'm still getting the same issue. Also, I have attached a screenshot of what I am seeing in xcode. Any help would be fully appreciated.

我试图站起来，以响应本地的方式运行，我在xcode中看到了下面的消息。我进入了react native故障排除页面并试图杀死端口8081进程，但我仍然得到了相同的问题。另外，我还附上了我在xcode中看到的截图。任何帮助都将得到充分的感谢。

Port 8081 already in use, packager is either not running or not running correctly Command /bin/sh failed with exit code 2

已经在使用的端口8081,packager要么没有运行，要么没有正确运行命令/bin/sh以退出代码2失败。

8 个解决方案

#1

With the help of other people's answers. I tried the following steps. It worked for me and hopefully for others. It only works for iOS. Let’s say we want to change the 8081 port to 8999 port.

在别人的帮助下。我尝试了以下步骤。这对我和其他人都有帮助。它只适用于iOS。假设我们想将8081端口更改为8999端口。

First, Open Xcode.

首先,打开Xcode。

• Look at Project navigator(left) In [ProjectName]/[ProjectName]/AppDelegate.m:

  在[ProjectName]/[ProjectName]/AppDelegate.m中查看项目导航器(左)。

  Change

  改变

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

  to

  来

  http://localhost:8999/index.ios.bundle?platform=ios&dev=true
  

• In Project navigator(left) [ProjectName]/ Libraries:

  项目导航(左)[项目名称]/库:

  Click “React.xcodeproj”. On main panel, click “Build Phases” tag.

  点击“React.xcodeproj”。在主面板上，点击“构建阶段”标签。

  Expand “Run Script” , delete it with the cross.

  展开“运行脚本”，并将其删除。

• In Project navigator(left) [ProjectName] / Libraries / RCTWebSocket.xcodeproj / RCTWebSocketExecutor.m : Search 8081 and replace it with 8999

  在项目导航器(左)[ProjectName] /库/ RCTWebSocket中。xcodeproj / RCTWebSocketExecutor。m:搜索8081，用8999替换。

Second open Finder

第二个开放仪

In the project root, open “package.json” :

在项目根中打开“包”。json”:

Change the “script” attribute to :

将“脚本”属性更改为:

{...

    "start": "node_modules/react-native/packager/packager.sh --port=8999"
...
}

Then Open terminal

然后打开终端

• $cd to project root :

  $cd至项目根:

  $ npm start

  美元npm开始

Cool! Then

太酷了!然后

Go back to Xcode and click play button.

回到Xcode，点击play按钮。

Cross your fingers.

交叉你的手指。

Be Patient. There will be a blank in client.

要有耐心。客户端会有空白。

You can see it is doing building on backend(terminal will log it).

您可以看到它正在后台进行构建(终端将记录它)。

#2

If you do lsof -n -i4TCP:8081 as recommended in Facebook's troubleshooting page and get an empty result, try again using sudo lsof -n -i4TCP:8081.

如果你在Facebook的故障排除页面中推荐了lsof -n -i4TCP:8081，然后得到一个空结果，那么再试试使用sudo lsof -n -i4TCP:8081。

In my case, it turns out McAfee anti-virus software is running process that listens on that port. Killing that process (I know, I know!) fixed the problem.

在我的例子中，McAfee杀毒软件正在运行在那个端口上监听的进程。杀死那个过程(我知道，我知道!)解决了这个问题。

#3

Try the following steps for those that need to change port 8081 to a different port.

对于需要将端口8081更改为另一个端口的操作，请尝试以下步骤。

> npm start

> npm开始

will launch node_modules/react-native/packager/packager.sh

将启动node_modules / react-native /包装机/ packager.sh吗

In there it will merge command line parameters, i.e. --port into the predefined options. i.e. port=8081

在那里，它将合并命令行参数，即端口进入预定义选项。即端口= 8081

I updated the package.json start option to include my prefered port, as i was unable to stop existing services using this port.

我更新了包。json开始选项包括我的首选端口，因为我无法停止使用这个端口的现有服务。

{
  "name": "AwesomeProject",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node_modules/react-native/packager/packager.sh --port=8999"
  },
  "dependencies": {
    "react-native": "^0.12.0"
  }
}

** Note that this may not work for android which is apparently hard coded to 8081 Stack Post Here

**注意，这可能不适用于android，这显然是硬编码到8081栈的帖子。

Building XCode When building xcode will still fail as it tries to run a script to launch node. You will either need to remove this script from the build process or update it to the new port.

在构建XCode时，构建XCode仍然会失败，因为它试图运行一个脚本以启动节点。您将需要从构建过程中删除该脚本，或者将其更新到新的端口。

Under libraries select React.xcodeproj. In the main screen select Build Phases. You will see Run Script.

在库选择React.xcodeproj。在主屏幕中选择构建阶段。您将看到运行脚本。

Either remove this entry, having called npm start yourself, or edit the port.

要么删除该条目，调用npm启动自己，要么编辑端口。

if nc -w 5 -z localhost 8999 ; then
  if ! curl -s "http://localhost:8999/status" | grep -q "packager-status:running" ; then
    echo "Port 8999 already in use, packager is either not running or not running correctly"
    exit 2
  fi
else
  open $SRCROOT/../packager/launchPackager.command || echo "Can't start packager automatically"
fi

Debugging Seems 8081 is all over the shop. Need to additionally updated the RCTWebSocketExecutor.m under xcode-project: Libraries/RCTWebSocket.xcodeproj

调试似乎是8081遍了整个商店。需要另外更新RCTWebSocketExecutor。/ RCTWebSocket.xcodeproj m在xcode项目:库

- (instancetype)init
{
  return [self initWithURL:[RCTConvert NSURL:@"http://localhost:8999/debugger-proxy"]];
}

** Launching packager from IOS ** If launching only from ios then you additionally need to edit launchPackager.command to add in the appropriate port as this file is used by xcode to run the javascript.

**如果只在IOS中启动，那么你还需要编辑launchpackager .命令来添加适当的端口，因为xcode使用这个文件来运行javascript。

$THIS_DIR/packager.sh  --port=8999

#4

Had the same problem!

有同样的问题!

For Android I can use adb to redirect port, but in iOS, cannot figure our a way to run react native in custom port. Have to take over the 8081 port from McAfee.

对于Android，我可以使用adb来重定向端口，但在iOS中，我们无法找到在定制端口上运行响应的方法。必须接管McAfee的8081端口。

For those Mac user who cannot kill the McAfee process/service directly, you can unload it via launchctl(MacOS), then you can run the packager server on the default 8081 port.

对于那些无法直接杀死McAfee进程/服务的Mac用户，您可以通过launchctl(MacOS)卸载它，然后您可以在默认的8081端口上运行packager服务器。

cd /Library/LaunchDaemons
sudo launchctl unload com.mcafee.agent.macmn.plist

Also wrote an memo to explain the launchctl detail and MacOS boot flow.

还写了一个备忘录来解释launchctl细节和MacOS引导流。

#5

Interesting enough, I just run into the same problem. However the solution is a bit different for me, none of above suggested methods worked.

有趣的是，我遇到了同样的问题。但是，对于我来说，解决方案有点不同，上面没有一个建议的方法有效。

I have LittleSnithc installed, and when I hit run in Xcode, LittleSnitch prompted that Xcode was trying to connect to "localhost.lan" via nc. Of course I had no reason to deny it, then the build failed.

我安装了LittleSnithc，当我在Xcode中运行时，LittleSnitch提示Xcode尝试连接到“localhost”。通过数控局域网”。当然，我没有理由否认它，然后就失败了。

All I did after is denying the outgoing connection of Xcode via nc to localhost.lan in LittleSnitch and the probleme is gone!

我所做的就是拒绝通过nc到localhost来连接Xcode。lan在LittleSnitch，问题已经消失了!

#6

I figured out the issue: for some reason I didn't kill the process on port 8081 and it was causing Xcode to fail.

我发现了这个问题:出于某种原因，我没有在端口8081上杀死这个进程，它导致Xcode失败。

Solution:

解决方案:

1. Kill the process on port 8081.
2. 在端口8081上杀死进程。
3. Clean Xcode: Xcode Menu > Product > Clean.
4. 清洁Xcode: Xcode菜单>产品> Clean。
5. Reopen Xcode.
6. Xcode重新开放。

Resource:

资源:

React-Native Troubleshooting

React-Native故障排除

#7

My problem was the Wifi DNS setup..

我的问题是Wifi DNS设置。

i. Go to Settings-> Network.

进入设置->网络。

ii. Select the connected Wifi, click Advance.

二世。选择连接的Wifi，点击前进。

iii. Select DNS, you might have set your DNS server to 8.8.8.8 (God knows your intention ;) ). Delete it and set it to the default 192.168.1.1. Click OK.

三世。选择DNS，您可能将您的DNS服务器设置为8.8.8.8(上帝知道您的意图)。删除它并将其设置为默认的192.168.1.1。单击OK。

iv. Run the react-native run-ios in terminal and it works.

4 .在终端运行堆内运行的Run -ios，运行正常。

#8

run the following command:

运行以下命令:

react-native start --port=8088

react-native开始——端口= 8088

I had the same issue with McAfee running on 8081. This worked for me.

我和迈克菲在8081年也有同样的问题。这为我工作。

https://facebook.github.io/react-native/docs/troubleshooting.html

https://facebook.github.io/react-native/docs/troubleshooting.html