WithBrowserLogs Edge private CDP pipe fails with "Browser debug pipe closed"

[maddymontaquila]

Description

When started from inside the integrated VS Code terminal (both pwsh and "aspire terminal"), WithBrowserLogs() can fail to open the tracked Edge browser even when the application itself is healthy and reachable. The web-browser-logs resource fails immediately with EndOfStreamException: Browser debug pipe closed while launching Edge through Aspire's private CDP pipe.

This was observed with both browser data modes:

• Default/shared Aspire-managed Edge profile: failed with Browser debug pipe closed
• Isolated mode configured through the browser configuration tools: also failed with Browser debug pipe closed

So this does not appear to be limited to the default shared Aspire-managed browser profile. It looks like Edge/private-CDP-pipe startup can fail immediately, and Aspire currently does not recover, fall back, or provide an actionable diagnostic.

Environment

• Repo/app: kaylas-garden
• OS: Windows
• Browser: Edge at C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
• Aspire SDK: 13.3.0
• Aspire.Hosting.Browsers: 13.3.0-preview.1.26256.5
• AppHost: TypeScript �pphost.ts

Symptoms

• web resource is Running/Healthy
• http://localhost:3000/ returns HTTP 200 outside browser-log tracking
• web-browser-logs enters FailedToStart
• Last error: EndOfStreamException: Browser debug pipe closed.
• In the isolated-mode repro, resource properties showed:
  • Browser: msedge
  • User data mode: Isolated

Expected behavior

The tracked browser should open successfully, or Aspire should recover/fallback/diagnose why Edge exited or closed the private CDP pipe.

Actual behavior

The tracked browser command fails repeatedly with EndOfStreamException: Browser debug pipe closed.

Running "aspire start" from a regular terminal works fine though?

Original browser log: web-browser-logs-20260507032422.txt

Log

ext 2026-05-07T19:23:40.1529430Z Executing command 'open-tracked-browser'. 2026-05-07T19:23:40.1601238Z [session-0001] Opening tracked browser for 'http://localhost:3000/' using 'msedge'. 2026-05-07T19:23:40.1673509Z [session-0001] Resolving tracked browser host. User data mode: Shared; browser: 'msedge'; profile: '(default)'. 2026-05-07T19:23:40.1898986Z [session-0001] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'. 2026-05-07T19:23:40.2174481Z [session-0001] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed. 2026-05-07T19:23:40.2237764Z [session-0001] Failed to open tracked browser for 'http://localhost:3000/'. System.IO.EndOfStreamException: Browser debug pipe closed. at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319 at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215 at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167
at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65
at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111
2026-05-07T19:23:40.2254253Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed.
2026-05-07T19:23:41.9208190Z Executing command 'open-tracked-browser'.
2026-05-07T19:23:41.9210697Z [session-0002] Opening tracked browser for 'http://localhost:3000/' using 'msedge'.
2026-05-07T19:23:41.9211831Z [session-0002] Resolving tracked browser host. User data mode: Shared; browser: 'msedge'; profile: '(default)'.
2026-05-07T19:23:41.9294513Z [session-0002] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'.
2026-05-07T19:23:41.9507450Z [session-0002] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed.
2026-05-07T19:23:41.9513122Z [session-0002] Failed to open tracked browser for 'http://localhost:3000/'.
System.IO.EndOfStreamException: Browser debug pipe closed.
at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319
at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215
at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in /_/src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167 at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in /_/src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65 at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in /_/src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111 2026-05-07T19:23:41.9515435Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed. 2026-05-07T19:23:46.4272271Z Executing command 'open-tracked-browser'. 2026-05-07T19:23:46.4274561Z [session-0003] Opening tracked browser for 'http://localhost:3000/' using 'msedge'. 2026-05-07T19:23:46.4275123Z [session-0003] Resolving tracked browser host. User data mode: Shared; browser: 'msedge'; profile: '(default)'. 2026-05-07T19:23:46.4379633Z [session-0003] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'. 2026-05-07T19:23:46.4571417Z [session-0003] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed. 2026-05-07T19:23:46.4598776Z [session-0003] Failed to open tracked browser for 'http://localhost:3000/'. System.IO.EndOfStreamException: Browser debug pipe closed. at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319 at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215 at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167
at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65
at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111
2026-05-07T19:23:46.4600910Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed.
2026-05-07T19:23:52.7729247Z Executing command 'open-tracked-browser'.
2026-05-07T19:23:52.7731662Z [session-0004] Opening tracked browser for 'http://localhost:3000/' using 'msedge'.
2026-05-07T19:23:52.7732253Z [session-0004] Resolving tracked browser host. User data mode: Shared; browser: 'msedge'; profile: '(default)'.
2026-05-07T19:23:52.7854029Z [session-0004] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'.
2026-05-07T19:23:52.8063836Z [session-0004] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed.
2026-05-07T19:23:52.8071308Z [session-0004] Failed to open tracked browser for 'http://localhost:3000/'.
System.IO.EndOfStreamException: Browser debug pipe closed.
at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319
at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215
at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in /_/src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167 at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in /_/src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65 at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in /_/src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111 2026-05-07T19:23:52.8073666Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed. 2026-05-07T19:23:56.0880510Z Executing command 'open-tracked-browser'. 2026-05-07T19:23:56.0882731Z [session-0005] Opening tracked browser for 'http://localhost:3000/' using 'msedge'. 2026-05-07T19:23:56.0883360Z [session-0005] Resolving tracked browser host. User data mode: Shared; browser: 'msedge'; profile: '(default)'. 2026-05-07T19:23:56.0976999Z [session-0005] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'. 2026-05-07T19:23:56.1206620Z [session-0005] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed. 2026-05-07T19:23:56.1213129Z [session-0005] Failed to open tracked browser for 'http://localhost:3000/'. System.IO.EndOfStreamException: Browser debug pipe closed. at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319 at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215 at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167
at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65
at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111
2026-05-07T19:23:56.1215302Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed.
2026-05-07T19:24:03.7107025Z Executing command 'configure-tracked-browser'.
2026-05-07T19:24:13.2956097Z Command 'configure-tracked-browser' was canceled.
2026-05-07T19:24:15.1829371Z Executing command 'open-tracked-browser'.
2026-05-07T19:24:15.1831652Z [session-0006] Opening tracked browser for 'http://localhost:3000/' using 'msedge'.
2026-05-07T19:24:15.1832489Z [session-0006] Resolving tracked browser host. User data mode: Shared; browser: 'msedge'; profile: '(default)'.
2026-05-07T19:24:15.1943484Z [session-0006] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'.
2026-05-07T19:24:15.2204805Z [session-0006] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed.
2026-05-07T19:24:15.2212735Z [session-0006] Failed to open tracked browser for 'http://localhost:3000/'.
System.IO.EndOfStreamException: Browser debug pipe closed.
at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319
at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215
at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger`1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167
at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65
at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111
2026-05-07T19:24:15.2214928Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed.

`

See the follow-up comment for the additional isolated-mode log (web-browser-logs-20260507033533.txt).

[maddymontaquila]

@davidfowl FYI — the attached browser logs show the shared Edge browser-log profile failing immediately with Browser debug pipe closed; switching the app to BrowserUserDataMode.Isolated fixed it briefly, then it was broken again

[maddymontaquila]

Update: this repro is stronger than initially reported. The same EndOfStreamException: Browser debug pipe closed failure also happens when browser logs are configured to use User data mode: Isolated through the browser configuration tools, without requiring the AppHost code-level BrowserUserDataMode.Isolated workaround.

Current observed state:

• web is still Running/Healthy at http://localhost:3000
• web-browser-logs is FailedToStart
• Browser: msedge
• User data mode: Isolated
• Last error: EndOfStreamException: Browser debug pipe closed.

So this does not appear to be limited to the default shared Aspire-managed Edge profile. It looks more like Edge/private-CDP-pipe startup can fail immediately for both shared and isolated browser-log profiles.

Additional browser log: web-browser-logs-20260507033533.txt

Log

ext 2026-05-07T19:35:15.9748459Z Executing command 'open-tracked-browser'. 2026-05-07T19:35:15.9821248Z [session-0001] Opening tracked browser for 'http://localhost:3000/' using 'msedge'. 2026-05-07T19:35:15.9895955Z [session-0001] Resolving tracked browser host. User data mode: Isolated; browser: 'msedge'; profile: '(default)'. 2026-05-07T19:35:16.0106136Z [session-0001] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'. 2026-05-07T19:35:16.0291562Z [session-0001] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed. 2026-05-07T19:35:16.0336676Z [session-0001] Failed to open tracked browser for 'http://localhost:3000/'. System.IO.EndOfStreamException: Browser debug pipe closed. at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319 at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in /_/src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215 at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167
at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65
at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111
2026-05-07T19:35:16.0351927Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed.
2026-05-07T19:35:27.6073222Z Executing command 'open-tracked-browser'.
2026-05-07T19:35:27.6077091Z [session-0002] Opening tracked browser for 'http://localhost:3000/' using 'msedge'.
2026-05-07T19:35:27.6079131Z [session-0002] Resolving tracked browser host. User data mode: Isolated; browser: 'msedge'; profile: '(default)'.
2026-05-07T19:35:27.6189252Z [session-0002] Using Owned tracked browser host 'C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe' at 'private CDP pipe'.
2026-05-07T19:35:27.6375942Z [session-0002] Setting up the tracked browser page failed: EndOfStreamException: Browser debug pipe closed.
2026-05-07T19:35:27.6386235Z [session-0002] Failed to open tracked browser for 'http://localhost:3000/'.
System.IO.EndOfStreamException: Browser debug pipe closed.
at Aspire.Hosting.BrowserLogsCdpConnection.ReceiveLoopAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 319
at Aspire.Hosting.BrowserLogsCdpConnection.DisposeAsync() in //src/Aspire.Hosting.Browsers/BrowserLogsCdpConnection.cs:line 215
at Aspire.Hosting.BrowserLogsRunningSession.StartAsync(BrowserConfiguration configuration, String resourceName, String sessionId, Uri url, BrowserHostRegistry browserHostRegistry, ILogger resourceLogger, ILogger`1 logger, TimeProvider timeProvider, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 167
at Aspire.Hosting.BrowserLogsRunningSessionFactory.StartSessionAsync(BrowserConfiguration configuration, String resourceName, Uri url, String sessionId, ILogger resourceLogger, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsRunningSession.cs:line 65
at Aspire.Hosting.BrowserLogsSessionManager.StartSessionAsync(BrowserLogsResource resource, BrowserConfiguration configuration, String resourceName, Uri url, CancellationToken cancellationToken) in //src/Aspire.Hosting.Browsers/BrowserLogsSessionManager.cs:line 111
2026-05-07T19:35:27.6389663Z Failure executing command 'open-tracked-browser'. Error message: Browser debug pipe closed.

`

[maddymontaquila]

New clue: this appears to be tied to launching the AppHost from the VS Code integrated terminal/debug environment. The same app/browser-log flow has been repro'd multiple times from VS Code terminal, but appears not to reproduce from a regular standalone terminal.

That points at inherited process environment as a likely factor. In the Windows browser-log launcher, Aspire starts Edge via CreateProcessW(... lpEnvironment: IntPtr.Zero ...), so Edge inherits the AppHost environment. When the AppHost is launched by VS Code/Electron, Chromium/Electron-related env vars may be present (for example CHROME_CRASHPAD_PIPE_NAME, TERM_PROGRAM=vscode, VSCODE_*, etc.). A prior aspire describe for this AppHost showed CHROME_CRASHPAD_PIPE_NAME in the resource environment while running from VS Code.

Hypothesis: Edge is inheriting VS Code/Electron/Chromium environment and exiting or closing the private CDP pipe during very early startup. Aspire then only reports EndOfStreamException: Browser debug pipe closed, losing the underlying Edge startup/exit reason.

[maddymontaquila]

Additional update from a live repro on the current https://localhost:10322 AppHost started from the VS Code integrated terminal:

• Clearing CHROME_CRASHPAD_PIPE_NAME before aspire start did not fix the issue.
• Current web resource remains Running/Healthy at http://localhost:3000.
• Current web-browser-logs state is FailedToStart with Last error: EndOfStreamException: Browser debug pipe closed.
• Current browser-log config is still Browser: msedge, User data mode: Isolated.
• The selected web resource environment no longer shows CHROME_CRASHPAD_PIPE_NAME; only NODE_ENV and NODE_EXTRA_CA_CERTS matched the browser/electron/env probe.
• A tight process poll during open-tracked-browser did not catch an msedge.exe process with Aspire\BrowserData/remote-debugging; if Edge starts, it exits extremely quickly.
• No Windows Application Error / Windows Error Reporting event for Edge was created during the repro.

So the integrated-terminal clue still seems important, but this is not explained solely by inherited CHROME_CRASHPAD_PIPE_NAME. The next likely areas are VS Code terminal/process ancestry, inherited console/job/session behavior, or another inherited environment/policy difference. Aspire also still loses the actual owned Edge process exit reason during setup.