Channel closed

[TchernyavskyDaniil]

Hi, I have sometimes issue like this on the test server:

HappyThread[5]: unable to send to worker! Error [ERR_IPC_CHANNEL_CLOSED]: Channel closed
    at ChildProcess.target.send (internal/child_process.js:678:16)
    at processSend (/opt/testsites/projectdir/node_modules/happypack/lib/processSend.js:8:15)
    at Object.UnbufferedFd.send (/opt/testsites/projectdir/node_modules/happypack/lib/UnbufferedFd.js:9:3)
    at send (/opt/testsites/projectdir/node_modules/happypack/lib/HappyThread.js:38:20)
    at Object.compile (/opt/testsites/projectdir/node_modules/happypack/lib/HappyThread.js:146:7)
    at Object.compile (/opt/testsites/projectdir/node_modules/happypack/lib/HappyThreadPool.js:82:14)
    at HappyPlugin.compile (/opt/testsites/projectdir/node_modules/happypack/lib/HappyPlugin.js:194:14)
    at Object.HappyLoader (/opt/testsites/projectdir/node_modules/happypack/lib/HappyLoader.js:31:15)
    at LOADER_EXECUTION (/opt/testsites/projectdir/node_modules/loader-runner/lib/LoaderRunner.js:119:14)
    at runSyncOrAsync (/opt/testsites/projectdir/node_modules/loader-runner/lib/LoaderRunner.js:120:4)
    at iterateNormalLoaders (/opt/testsites/projectdir/node_modules/loader-runner/lib/LoaderRunner.js:232:2)
    at Array.<anonymous> (/opt/testsites/projectdir/node_modules/loader-runner/lib/LoaderRunner.js:205:4)
    at Storage.finished (/opt/testsites/projectdir/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:43:16)
    at /opt/testsites/projectdir/node_modules/enhanced-resolve/lib/CachedInputFileSystem.js:79:9
    at /opt/testsites/projectdir/node_modules/graceful-fs/graceful-fs.js:90:16
    at FSReqCallback.readFileAfterClose [as oncomplete] (internal/fs/read_file_context.js:61:3)

My config with Happypack:

const HappyPack = require('happypack');
const happyThreadPool = HappyPack.ThreadPool({ size: 6 });

module.exports = {
  ...
   module: {
    rules: [
      {
        test: /\.jsx?$/,
        use: 'happypack/loader?id=babel',
        exclude: /node_modules/,
      },
      // another loaders
    ]
  }
  ...
   plugins: [
    new HappyPack({
      id: 'babel',
      threadPool: happyThreadPool,
      loaders: ['babel-loader', 'cache-loader'],
    }),
    // another plugins
    ...
  ]

Can you explain to me please, what's wrong?

[amireh]

Hmm, it's difficult to tell from what we have...

1) Can you try disabling the cache-loader and see if that affects it? 2) Do you always get this? 3) Turn on the debug flag when you create the plugin please, it should then log what files it's currently processing, which may help us figure out what's going on

Thanks, let me know.

[abhinavsingi]

@TchernyavskyDaniil - What was causing your issue? I'm also facing it and everytime not just sometimes.