Failed to intercept with Frida on Google Pixel 8 (Android 14) – "Unable to find copied methods in java/lang/Thread"

[ItsMarcoDE]

Description

When trying to intercept traffic with Frida from the app de.wetteronline.wetterapp (WetterOnline), HTTP Toolkit fails with the following error:

Failed to intercept
de.wetteronline.wetterapp: Failed to run Frida script on Android
(de.wetteronline.wetterapp): Error:
Unable to find copied methods in java/lang/Thread; please file a bug (frida-script-error)

Environment

• Device: Google Pixel 8
• Android Version: 14
• Root: Magisk + Frida Magisk Module 17.8.2
• Frida version used by HTTP Toolkit: The bundled Frida version causes the target apps to not even start/load at all (crash or freeze on launch).
  Therefore I’m using the Magisk Frida 17.8.2 module instead.

Additional information

This seems to be a widespread compatibility issue with Frida 17.x (especially 17.5+ / 17.8.2) on Android 14+ and Pixel devices due to changes in the Android ART runtime. There are already many similar open issues in the official Frida repository.

Steps to reproduce

1. Rooted Google Pixel 8 on Android 14 with Magisk + Frida 17.8.2
2. Open HTTP Toolkit and try to intercept any app (e.g. de.wetteronline.wetterapp)
3. The error above appears immediately

Expected behavior: Successful HTTPS interception and certificate unpinning via Frida.
Actual behavior: Frida script fails to run.

Happy to provide more logs, adb output or test any suggested workarounds.

[pimterry]

Thanks for reporting this. To confirm: if you manually launch 17.8.2, it works fine? I'm slightly unclear from your description you're having issues with compatibility with 17.8.2, or if you're using 17.8.2 as a workaround to resolve issues with the default version.

If 17.8.2 is working fine that's great, so do let me know, that's now stable enough we could update right away. I'll start prepping a release with that included as the default version now, please do confirm if it works in your setup as well.

[ItsMarcoDE]

Thanks for the quick reply!

To clarify: unfortunately 17.8.2 does NOT work either.
I tested both the Magisk Frida module 17.8.2 and the brand new 17.8.3 (released today) — I get exactly the same error shown in the screenshot for every single app.

The bundled Frida version that comes with HTTP Toolkit is even worse, which is why I tried the newer Magisk versions as a workaround. But they produce the identical Unable to find copied methods in java/lang/Thread error.

This seems to be a widespread Frida core issue that has been affecting many users for weeks/months (especially on Pixel devices + Android 14/15/16). There are multiple open reports in the Frida repo, for example:

• Unable to find copied methods in java/lang/Thread frida/frida#3713
• Frida Gadget error: “Unable to find copied methods in java/lang/Thread” on Android 15 — anyone else? frida/frida#3666
• Android 15 (SDK 35): “Unable to find copied methods in java/lang/Thread” on OnePlus CPH2709 frida/frida#3652
  (and several more duplicates).

So it looks like this is not specific to HTTP Toolkit — the Frida script simply can’t initialize properly on current Android ART.

I’m happy to test any future Frida update or beta as soon as one becomes available.

Thanks again!

[ItsMarcoDE]

Does the HTTP Toolkit use the Frida Tools? I've read in a few commits that the latest version needs to be used here as well... since there have been some changes to the Java Bridge.

[pimterry]

Does the HTTP Toolkit use the Frida Tools?

It doesn't directly, it does use its own bundled version of frida-java-bridge though. You can test this out by updating to the latest version locally, in case that helps: find your override path (e.g. open an intercepted terminal and echo $HTTP_TOOLKIT_OVERRIDE_PATH), go to $HTTP_TOOLKIT_OVERRIDE_PATH/frida/, and then run:

npm install frida-java-bridge@latest && echo "import Java from 'frida-java-bridge'; globalThis.Java ||= Java;" > global-java.js && npx frida-compile global-java.js -Sc -B iife -T none -o frida-java-bridge.js

This updates the frida-java-bridge.js file there (that same command is documented in a comment at the top).

If you then restart HTTP Toolkit, the updated bridge version should be used. The current version there is from 7.0.10 and the latest is 7.0.13 so it's possible this could help.

[ItsMarcoDE]

This actually fixes the issue; the error no longer occurs. So updating to the latest version of Frida and the frida-java-bridge helps.

[pimterry]

Excellent! Ok, that's perfect then, I'll push out a release with this in the next couple of days.