2025-09 fails to install OpenJDK 25 and Temurin JDK 25

[pinacoelho]

Let's make sure issue is not already fixed in latest builds first.

• I verified I can reproduce this issue against latest Integration Build of Eclipse SDK

Used eclipse-installer to install an "eclipse-platform", then installed the JDT, got the same situation.

Steps to reproduce

• Start with a 2025-06, after it starts I get the a tab with orange buttons and select the update to 2025-09
• After the update is done, I get a tab "Install a Java 25 JDK" with orange buttons "Download Temurin JDK 25", and "Download OpenJDK 25".

Clicking on each causes the respective message on the OS terminal from which eclipse was launched:

For Temurin:
<< All the ENV variables as if I ran 'env' >>
https://adoptium.net/temurin/releases/?version=25

For OpenJDK:
/usr/bin/env: ‘https://jdk.java.net/25/’: No such file or directory

I expected: The respective JDK to be downloaded and installed.

But got: output that's not even an actual error like "couldn't connect" or "404".

There's nothing that looks relevant on <workspace>/.metadata/.log

Tested under this environment:

• OS & version: Ubuntu 24.04.3

• Eclipse Version: 2025-09 (4.37.0)/Build id: 20250905-1456

• Same for my four eclipse instances (shared BundlePool) (except that the final '/' may be missing.

Community

• I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.

[merks]

Both links should open in the external browser.

What browser is configured in the preferences?

[merks]

I tested Windows today and both links work:

How are your preferences configured?

Does the No Thank You button work?

[merks]

It all worked for me on my Fedora virtual box too:

It sounds like a problem with how your browser is configured in the preferences...

[pinacoelho]

It has "Use external web browser/Default system web browser"...

If I change it to "Use external web browser/Firefox", the orange button opens the relevant URL on firefox.

The system default is "Firefox" (which happens to be a snap)

If I use "open " from the command line, it does open a firefox tab, so what's the invocation difference between "Default system web browser" and "Firefox" (which is bound to /usr/bin/firefox) ?

[pinacoelho]

After changing to "Firefox" (had to add the %URL% on the empty parameter box), and back to "Default system web browser", I now get an "Error" popup: "Could not launch external web browser for https://jdk.java.net/25/. Check the Web Browser Preferences."

This makes me think that there may be some leakage between the definitions, because changing the "Firefox" parameters shouldn't change the behavior of "Default system web browser".

system settings:

xdg-settings get default-web-browser

firefox_firefox.desktop

; The only firefox_firefox.desktop on the system: /var/lib/snapd/desktop/applications/firefox_firefox.desktop

Regular Exec line:
Exec=env BAMF_DESKTOP_FILE_HINT=/var/lib/snapd/desktop/applications/firefox_firefox.desktop /snap/bin/firefox %u

If I run it from a command line, I get a new tab on the Firefox window:

env BAMF_DESKTOP_FILE_HINT=/var/lib/snapd/desktop/applications/firefox_firefox.desktop /snap/bin/firefox https://github.com

[pinacoelho]

It sounds like a problem with how your browser is configured in the preferences...

I'm not excluding PEBKAC yet...

[pinacoelho]

In what file can I find the commands issued when using the "USe default" option ?

[merks]

That's a good question.

That message appears from here:

https://github.com/eclipse-platform/eclipse.platform.ui/blob/8ce2da845eaf55bc7de9044a140eb000796b5e92/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/SystemBrowserDescriptor.java#L19

There are a bunch of browser declared like this:

https://github.com/eclipse-platform/eclipse.platform.ui/blob/8ce2da845eaf55bc7de9044a140eb000796b5e92/bundles/org.eclipse.ui.browser/plugin.xml#L92-L133

There are descriptors that are used to launch

https://github.com/eclipse-platform/eclipse.platform.ui/blob/8ce2da845eaf55bc7de9044a140eb000796b5e92/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/BrowserDescriptor.java#L31-L39

I expect the default will pick one of the other ones, but I don't know.

A descriptor is used here to launch a process:

https://github.com/eclipse-platform/eclipse.platform.ui/blob/8ce2da845eaf55bc7de9044a140eb000796b5e92/bundles/org.eclipse.ui.browser/src/org/eclipse/ui/internal/browser/ExternalBrowserInstance.java#L44-L50

[akurtakov]

This (or at least similar problem) has been fixed in 4.38 stream - eclipse-platform/eclipse.platform.swt#2448 . It would be nice to test with latest I-build (https://download.eclipse.org/eclipse/downloads/drops4/I20251006-1800/ or newer) and tell us whether it fixes the problem for you.