Debug adapter process has terminated unexpectedly (read ECONNRESET)

Java debugger randomly terminates when debug attach with the following error:
Debug adapter process has terminated unexpectedly (read ECONNRESET)

Environment

• Operating System: Windows 7 Enterprise 64-bit
• JDK version: 1.8.0_66
• Visual Studio Code version: 1.30.0-insider (user setup)
• Java extension version: Java Extension Pack 0.4.0
• Java Debugger extension version: 0.15.0 - 2018-11-01

Steps To Reproduce

1. Configure launch.json:

{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [

    {
        "type": "java",
        "name": "Debug (Launch)",
        "request": "launch",
        "cwd": "${workspaceFolder}",
        "console": "internalConsole",
        "stopOnEntry": false,
        "mainClass": "",
        "args": ""
    },
    {
        "type": "java",
        "name": "Debug (Attach)",
        "request": "attach",
        "hostName": "localhost",
        "port": 5005
    }
]
}

2. Run java app using gradle appRunDebug gradlew clean appRunDebug --stacktrace

The following is the logs from the chrome dev tools console:

notificationsAlerts.ts:40 Debug adapter process has terminated unexpectedly (read ECONNRESET)
t.onDidNotificationChange @ notificationsAlerts.ts:40
(anonymous) @ notificationsAlerts.ts:26
e.fire @ event.ts:223
t.notify @ notifications.ts:113
t.error @ notificationService.ts:48
(anonymous) @ debugService.ts:511
e.fire @ event.ts:223
(anonymous) @ debugSession.ts:749
e.fire @ event.ts:223
t.fireAdapterExitEvent @ rawDebugSession.ts:460
(anonymous) @ rawDebugSession.ts:439
Promise resolved (async)
t.stopAdapter @ rawDebugSession.ts:438
(anonymous) @ rawDebugSession.ts:426
Promise rejected (async)
t.shutdown @ rawDebugSession.ts:422
(anonymous) @ rawDebugSession.ts:79
e.fire @ event.ts:223
(anonymous) @ debugAdapter.ts:281
emitOne @ events.js:116
emit @ events.js:211
emitErrorNT @ internal/streams/destroy.js:64
_combinedTickCallback @ internal/process/next_tick.js:138
_tickCallback @ internal/process/next_tick.js:180
console.ts:134 [Extension Host] rejected promise not handled within 1 second (at Timeout. (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:760:9))
t.log @ console.ts:134
t._logExtensionHostMessage @ extensionHost.ts:451
(anonymous) @ extensionHost.ts:244
emitTwo @ events.js:126
emit @ events.js:214
emit @ internal/child_process.js:772
_combinedTickCallback @ internal/process/next_tick.js:141
_tickCallback @ internal/process/next_tick.js:180
log.ts:169 ERR Running the contributed command:'java.execute.workspaceCommand' failed.: Error: Running the contributed command:'java.execute.workspaceCommand' failed.
at e._executeContributedCommand (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:497:869)
at e.executeCommand (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:497:95)
at Object.executeCommand (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:727:659)
at Object.executeJavaLanguageServerCommand (C:\Users\user_name.vscode-insiders\extensions\vscjava.vscode-java-debug-0.15.0\out\src\commands.js:19:28)
at fetchUsageData (C:\Users\user_name.vscode-insiders\extensions\vscjava.vscode-java-debug-0.15.0\out\src\extension.js:98:21)
at vscode.debug.onDidTerminateDebugSession (C:\Users\user_name.vscode-insiders\extensions\vscjava.vscode-java-debug-0.15.0\out\src\extension.js:37:9)
at e.fire (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:133:218)
at e.$acceptDebugSessionTerminated (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:515:765)
at t._doInvokeHandler (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:652:708)
at t._invokeHandler (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:652:380)
at t._receiveRequest (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:650:971)
at t._receiveOneMessage (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:649:900)
at c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:647:733
at c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:130:793
at e.fire (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:133:218)
at a (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:185:760)
at Socket.n._socketDataListener (c:\Users\user_name\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\node\extensionHostProcess.js:185:981)
at emitOne (events.js:116:13)
at Socket.emit (events.js:211:7)
at addChunk (_stream_readable.js:263:12)
at readableAddChunk (_stream_readable.js:250:11)
at Socket.Readable.push (_stream_readable.js:208:10)
at Pipe.onread (net.js:594:20)

After enabling the java extension logging (Java › Trace: Server = verbose) I got this when the error happened:

[Trace - 10:42:02] Received notification 'window/logMessage'.
Params: {
    "type": 2,
    "message": "13-Dec-2018 10:42:02 Could not load Gradle version information\nCannot download published Gradle versions.\norg.gradle.api.UncheckedIOException: Cannot download published Gradle versions.\r\n\tat com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.downloadVersionInformation(PublishedGradleVersions.java:175)\r\n\tat com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.tryToDownloadAndCacheVersions(PublishedGradleVersions.java:159)\r\n\tat com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.create(PublishedGradleVersions.java:119)\r\n\tat org.eclipse.buildship.core.util.gradle.PublishedGradleVersionsWrapper$LoadVersionsJob.run(PublishedGradleVersionsWrapper.java:66)\r\n\tat org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)\r\nCaused by: java.net.SocketTimeoutException: connect timed out\r\n\tat java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)\r\n\tat java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)\r\n\tat java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)\r\n\tat java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)\r\n\tat java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)\r\n\tat java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)\r\n\tat java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)\r\n\tat java.net.Socket.connect(Socket.java:589)\r\n\tat sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668)\r\n\tat sun.net.NetworkClient.doConnect(NetworkClient.java:175)\r\n\tat sun.net.www.http.HttpClient.openServer(HttpClient.java:432)\r\n\tat sun.net.www.http.HttpClient.openServer(HttpClient.java:527)\r\n\tat sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)\r\n\tat sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)\r\n\tat sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)\r\n\tat sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)\r\n\tat sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)\r\n\tat sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)\r\n\tat sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)\r\n\tat sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)\r\n\tat sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)\r\n\tat com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.downloadVersionInformation(PublishedGradleVersions.java:172)\r\n\t... 4 more\r\n"
}


[Warn  - 10:42:02] 13-Dec-2018 10:42:02 Could not load Gradle version information
Cannot download published Gradle versions.
org.gradle.api.UncheckedIOException: Cannot download published Gradle versions.
	at com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.downloadVersionInformation(PublishedGradleVersions.java:175)
	at com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.tryToDownloadAndCacheVersions(PublishedGradleVersions.java:159)
	at com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.create(PublishedGradleVersions.java:119)
	at org.eclipse.buildship.core.util.gradle.PublishedGradleVersionsWrapper$LoadVersionsJob.run(PublishedGradleVersionsWrapper.java:66)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.net.SocketTimeoutException: connect timed out
	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
	at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
	at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1105)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:999)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
	at com.gradleware.tooling.toolingutils.distribution.PublishedGradleVersions.downloadVersionInformation(PublishedGradleVersions.java:172)
	... 4 more

Current Result

vscode stopped debugging with this error message
Debug adapter process has terminated unexpectedly (read ECONNRESET)

Expected Result

Debugging should still continue as the same scenario works fine with any other IDE (eclipse, intellij)

从 launch.json 中的 attach 配置开始，运行 gradlew clean appRunDebug --stacktrace，并检查详细的 Java 服务器日志。通过 rawDebugSession.ts 和 debugSession.ts 追踪终止过程，以 ECONNRESET 和 Gradle 超时条目作为线索；当 attach 会话继续运行而不是意外停止时，即表示完成。