(react-native run-android --variant=release) Error: spawnSync ./gradlew ENOBUFS

This issue has popped up when I try to run my android app with any of my release-based variants. The app runs properly when not specifying a variant (using the debug variant), and I am also able to successfully create release .apk/.aab files as well.

When running npx react-native run-android --variant=release, the process goes on as normal until it reaches this point:

> Task :app:bundleReleaseJsAndAssets
warning: the transform cache was reset.
Loading dependency graph, done.
info Writing bundle output to:, /app/android/app/build/generated/assets/react/release/index.android.bundle
info Writing sourcemap output to:, /app/android/app/build/intermediates/sourcemaps/react/release/index.android.bundle.packager.map
info Done writing bundle output
info Done writing sourcemap output
info Copying 144 asset files
info Done copying assets
<=======------> 54% EXECUTING [2m 18s]
> IDLE
> IDLE
> IDLE
> :app:bundleReleaseJsAndAssets
> IDLE
> IDLE
> IDLE
> IDLE

after which it will consistently log a giant set of warnings related to the index.android.bundle. Here is an excerpt:

/app/android/app/build/generated/assets/react/release/index.android.bundle:29:134: warning: the variable "Promise" was not declared in function "isBoldTextEnabled"
__d(function(g,r,i,a,m,e,d){'use strict';var n=r(d[0])(r(d[1])),t=r(d[2]),o=r(d[3]),s=new Map,c={isBoldTextEnabled:function(){return Promise.resolve(!1)},isGrayscaleEnabled:function(){return Promise.resolve(!1)},isInvertColorsEnabled:function(){return Promise.resolve(!1)},isReduceMotionEnabled:function(){return new Promise(function(t,o){n.default?n.default.isReduceMotionEnabled(t):o(!1)})},isReduceTransparencyEnabled:function(){return Promise.resolve(!1)},isScreenReaderEnabled:function(){return new Promise(function(t,o){n.default?n.default.isTouchExplorationEnabled(t):o(!1)})},get fetch(){return this.isScreenReaderEnabled},addEventListener:function(n,o){var c;'change'===n||'screenReaderChanged'===n?c=t.addListener("touchExplorationDidChange",function(n){o(n)}):'reduceMotionChanged'===n&&(c=t.addListener("reduceMotionDidChange",function(n){o(n)})),s.set(o,c)},removeEventListener:function(n,t){var o=s.get(t);o&&(o.remove(),s.delete(t))},setAccessibilityFocus:function(n){o.sendAccessibilityEvent(n,o.getConstants().AccessibilityEventTypes.typeViewFocused)},announceForAccessibility:function(t){n.default&&n.default.announceForAccessibility(t)}};m.exports=c},23,[1,24,42,49]);
                                                                                                                                     ^~~~~~~
/app/android/app/build/generated/assets/react/release/index.android.bundle:38:3047: warning: the variable "DebuggerInternal" was not declared in function "value 16#"
__d(function(g,r,i,a,m,e,d){'use strict';var t=r(d[0]),l=r(d[1]),u=r(d[2]),s=r(d[3]),n=r(d[4]),h=(r(d[5]),r(d[6])),o=r(d[7]),c=(r(d[8]),(function(){function c(){l(this,c),this._lazyCallableModules={},this._queue=[[],[],[],0],this._successCallbacks=new Map,this._failureCallbacks=new Map,this._callID=0,this._lastFlush=0,this._eventLoopStartTime=Date.now(),this._immediatesCallback=null,this.callFunctionReturnFlushedQueue=this.callFunctionReturnFlushedQueue.bind(this),this.callFunctionReturnResultAndFlushedQueue=this.callFunctionReturnResultAndFlushedQueue.bind(this),this.flushedQueue=this.flushedQueue.bind(this),this.invokeCallbackAndReturnFlushedQueue=this.invokeCallbackAndReturnFlushedQueue.bind(this)}return u(c,[{key:"callFunctionReturnFlushedQueue",value:function(t,l,u){var s=this;return this.__guard(function(){s.__callFunction(t,l,u)}),this.flushedQueue()}},{key:"callFunctionReturnResultAndFlushedQueue",value:function(t,l,u){var s,n=this;return this.__guard(function(){s=n.__callFunction(t,l,u)}),[s,this.flushedQueue()]}},{key:"invokeCallbackAndReturnFlushedQueue",value:function(t,l){var u=this;return this.__guard(function(){u.__invokeCallback(t,l)}),this.flushedQueue()}},{key:"flushedQueue",value:function(){var t=this;this.__guard(function(){t.__callImmediates()});var l=this._queue;return this._queue=[[],[],[],this._callID],l[0].length?l:null}},{key:"getEventLoopRunningTime",value:function(){return Date.now()-this._eventLoopStartTime}},{key:"registerCallableModule",value:function(t,l){this._lazyCallableModules[t]=function(){return l}}},{key:"registerLazyCallableModule",value:function(t,l){var u,s=l;this._lazyCallableModules[t]=function(){return s&&(u=s(),s=null),u}}},{key:"getCallableModule",value:function(t){var l=this._lazyCallableModules[t];return l?l():null}},{key:"callNativeSyncHook",value:function(t,l,u,s,n){this.processCallbacks(t,l,u,s,n);try{return g.nativeCallSyncHook(t,l,u)}catch(t){throw'object'==typeof t&&null!=t&&void 0===t.framesToPop&&/^Exception in HostFunction: /.test(t.message)&&(t.framesToPop=2),t}}},{key:"processCallbacks",value:function(t,l,u,s,n){(s||n)&&(s&&u.push(this._callID<<1),n&&u.push(this._callID<<1|1),this._successCallbacks.set(this._callID,n),this._failureCallbacks.set(this._callID,s)),this._callID++}},{key:"enqueueNativeCall",value:function(t,l,u,s,h){this.processCallbacks(t,l,u,s,h),this._queue[0].push(t),this._queue[1].push(l),this._queue[2].push(u);var o=Date.now();if(g.nativeFlushQueueImmediate&&o-this._lastFlush>=5){var c=this._queue;this._queue=[[],[],[],this._callID],this._lastFlush=o,g.nativeFlushQueueImmediate(c)}n.counterEvent('pending_js_to_native_queue',this._queue[0].length),this.__spy&&this.__spy({type:1,module:t+'',method:l,args:u})}},{key:"createDebugLookup",value:function(t,l,u){}},{key:"setImmediatesCallback",value:function(t){this._immediatesCallback=t}},{key:"__guard",value:function(t){if(this.__shouldPauseOnThrow())t();else try{t()}catch(t){s.reportFatalError(t)}}},{key:"__shouldPauseOnThrow",value:function(){return'undefined'!=typeof DebuggerInternal&&!0===DebuggerInternal.shouldPauseOnThrow}},{key:"__callImmediates",value:function(){n.beginEvent('JSTimers.callImmediates()'),null!=this._immediatesCallback&&this._immediatesCallback(),n.endEvent()}},{key:"__callFunction",value:function(t,l,u){this._lastFlush=Date.now(),this._eventLoopStartTime=this._lastFlush,this.__spy?n.beginEvent(t+"."+l+"("+o(u)+")"):n.beginEvent(t+"."+l+"(...)"),this.__spy&&this.__spy({type:0,module:t,method:l,args:u});var s=this.getCallableModule(t);h(!!s,'Module %s is not a registered callable module (calling %s)',t,l),h(!!s[l],'Method %s does not exist on module %s',l,t);var c=s[l].apply(s,u);return n.endEvent(),c}},{key:"__invokeCallback",value:function(l,u){this._lastFlush=Date.now(),this._eventLoopStartTime=this._lastFlush;var s=l>>>1,n=1&l?this._successCallbacks.get(s):this._failureCallbacks.get(s);n&&(this._successCallbacks.delete(s),this._failureCallbacks.delete(s),n.apply(void 0,t(u)))}}],[{key:"spy",value:function(t){c.prototype.__spy=!0===t?function(t){console.log((0===t.type?'N->JS':'JS->N')+" : "+(t.module?t.module+'.':'')+t.method+"("+JSON.stringify(t.args)+")")}:!1===t?null:t}}]),c})());m.exports=c},32,[33,7,8,37,38,39,19,40,20]);

And at the end of these warnings, this error appears:

error Failed to install the app. Make sure you have the Android development environment set up: https://facebook.github.io/react-native/docs/getting-started.html#android-development-environment.
Error: spawnSync ./gradlew ENOBUFS
    at Object.spawnSync (internal/child_process.js:1041:20)
    at spawnSync (child_process.js:609:24)
    at execFileSync (child_process.js:636:15)
    at runOnAllDevices (/app/node_modules/@react-native-community/cli-platform-android/build/commands/runAndroid/runOnAllDevices.js:94:39)
    at buildAndRun (/app/node_modules/@react-native-community/cli-platform-android/build/commands/runAndroid/index.js:158:41)
    at /app/node_modules/@react-native-community/cli-platform-android/build/commands/runAndroid/index.js:125:12
    at processTicksAndRejections (internal/process/task_queues.js:85:5)
    at async Command.handleAction (/app/node_modules/react-native/node_modules/@react-native-community/cli/build/index.js:164:9)

Here are the relevant variant settings in app/build.gradle:

def keystore = getPassword("local", "android_keystore_password")
def key = getPassword("local", "android_key_password")
...
signingConfigs {
        release {
            storeFile file('app.keystore')
            storePassword keystore
            keyAlias 'app'
            keyPassword key
        }
        debug {
            storeFile file('debug.keystore')
            storePassword 'android'
            keyAlias 'androiddebugkey'
            keyPassword 'android'
        }
    }
    buildTypes {
        release {
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
            signingConfig signingConfigs.release
        }
        debug {
            debuggable true
            signingConfig signingConfigs.debug
        }
        stagingrelease {
            initWith release
            matchingFallbacks = ['release', 'debug']
        }
        productionrelease {
            initWith release
            matchingFallbacks = ['release']
        }
    }

React Native version:

System:
    OS: macOS Mojave 10.14.6
    CPU: (8) x64 Intel(R) Core(TM) i7-6920HQ CPU @ 2.90GHz
    Memory: 1.03 GB / 16.00 GB
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 12.6.0 - /usr/local/bin/node
    Yarn: 1.17.3 - /usr/local/bin/yarn
    npm: 6.11.3 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  SDKs:
    iOS SDK:
      Platforms: iOS 13.1, DriverKit 19.0, macOS 10.15, tvOS 13.0, watchOS 6.0
    Android SDK:
      API Levels: 19, 22, 23, 25, 26, 27, 28, 29
      Build Tools: 22.0.1, 23.0.1, 25.0.2, 27.0.3, 28.0.3, 29.0.0, 29.0.0, 29.0.0, 29.0.1
      System Images: android-22 | Google APIs Intel x86 Atom, android-23 | Google APIs Intel x86 Atom, android-25 | Google APIs Intel x86 Atom, android-28 | Google APIs Intel x86 Atom
      Android NDK: 20.0.5594570
  IDEs:
    Android Studio: 3.4 AI-183.6156.11.34.5692245
    Xcode: 11.1/11A1027 - /usr/bin/xcodebuild
  npmPackages:
    @react-native-community/cli: ^3.0.4 => 3.0.4
    react: 16.9.0 => 16.9.0
    react-native: 0.61.2 => 0.61.2

Steps to Reproduce:

1. npx react-native run-android --variant=release with above context

Expected: App to successfully run with specified variant.

[kylethielk]

We are also experiencing this issue.

Hermes Enabled RN 0.61.2

We are able to gradlew bundleRelease to build an apk/aab.

Happy to provide any additional details.

[ajpaulingalls]

same issue here, would rather not turn off hermes…