Broken Updates can not be reverted if a custom plugin was installed

[M-Marvin]

I am not sure if I am at the right place here, the entire Eclipse Project seems to be pretty chaotic.

I today updated the Eclipse IDE installation to 2025-09 4.37.0 using the "Install this IDE" Button below the information that this new version is available.
The IDE is now unable to load any projects and just crashes with an generic "something went wrong" like Error message.
This is probably a Bug in an Plugin I use and not the Issue I want to report.

I wanted to revert the Update by going to Help > About Eclipse > Installation Details > Installation History
But every time I try to revert to any point it aborts while downloading the artifacts and throws an error that it can not locate an specific Plugin, that Plugin I have written my self and installed in the drop ins folder.

I can't find a way to tell the IDE to just ignore that, so I am unable to fix my broken install.
Also, interestingly the version of my plugin is wrong in the message.
The Version I gave it and which it still has after the update is 0.10.0, not 0.8.0.
I don't know from where it pulls that version string.

I am not sure if this really is considered a Bug, but it (should) definitely not be inteded behavior.
It should either just warn about missing plugins after the revert, and ask the user if he wants to continue, or allow you to select that it just keeps the current version (I think the problem here is the wrong version string, 0.10.0 is still installed).

Here ist the full error message it gives me:

session context was:(profile=D__Eclipse_committers-2024-09_eclipse, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,de.m_marvin.eclipsemeta,0.8.0
Can't download artifact osgi.bundle,de.m_marvin.eclipsemeta,0.8.0 required by de.m_marvin.eclipsemeta[0.8.0], toolingwin32.win32.x86_64org.eclipse.equinox.common[4.36.0.20250605-1300], org.eclipse.mylyn.reviews.core[4.7.0.v20250326-1000], org.eclipse.oomph.p2.core[1.32.0.v20250411-1221], org.eclipse.jsch.core[1.5.600.v20250513-1235], org.eclipse.ui.console[3.14.300.v20250509-1251], org.eclipse.ant.ui[3.10.100.v20250514-1721], org.eclipse.mylyn.wikitext.markdown[4.7.0.v20250326-1000], org.commonmark-gfm-tables[0.24.0.v20241021-1700], org.eclipse.cdt.ui[9.0.100.202505282254], org.eclipse.mylyn.reviews.ui[4.7.0.v20250326-1000], org.eclipse.ui.ide[3.22.600.v20250523-1502], org.eclipse.core.expressions[3.9.400.v20240413-1529], org.eclipse.pde.runtime[3.8.700.v20250429-2245], org.eclipse.ui.themes[1.2.2800.v20250516-0925], org.eclipse.mylyn.wikitext.ant[4.7.0.v20250326-1000], org.eclipse.pde.bnd.ui[1.2.200.v20250515-0445], org.eclipse.mylyn.context.ui[4.7.0.v20250326-1000], 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org.eclipse.ui.cheatsheets[3.8.600.v20250509-1307], org.eclipse.core.databinding[1.13.500.v20250409-0730], org.eclipse.e4.core.contexts[1.13.100.v20250122-1647], org.eclipse.epp.mpc.core[1.12.1.v20250508-2126], org.eclipse.help[3.10.500.v20250423-1201], org.eclipse.ui.navigator[3.13.100.v20250426-1709], org.eclipse.equinox.jsp.jasper.registry[1.3.200.v20250519-0534], org.eclipse.oomph.p2.ui[1.23.0.v20241013-1114], org.eclipse.mylyn.wikitext.tasks.ui[4.7.0.v20250326-1000], org.eclipse.swt.tools[3.110.700.v20250505-1428], org.eclipse.tm.terminal.control[5.6.0.v20250507-0541], org.eclipse.debug.ui.launchview[1.1.800.v20250514-1721], org.eclipse.swt.svg[3.130.0.v20250501-0805], org.eclipse.pde.ds.annotations[1.4.100.v20250514-1540] from any of the following repositories: 
file:/C:/Users/marvi/.p2/pool/
file:/C:/Users/marvi/.p2/org.eclipse.equinox.p2.core/cache/
file:/C:/Users/marvi/.p2/pool/.eclipseextension
file:/D:/Eclipse/committers-2024-09/eclipse/configuration/org.eclipse.osgi/321/data/listener_1925729951/
https://download.eclipse.org/corrosion/releases/latest
https://download.eclipse.org/tools/cdt/releases/latest
https://download.eclipse.org/eclipse/updates/4.36
https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/release/4.33.0
http://download.eclipse.org/usssdk/updates/release/latest
https://devstyle.codetogether.io
https://download.eclipse.org/lsp4e/releases/0.26.6
https://download.eclipse.org/wildwebdeveloper/releases/1.3.10
https://download.eclipse.org/egit/updates-7.3
https://download.eclipse.org/webtools/downloads/drops/R3.35.0/R-3.35.0-20240825085431/repository
https://download.eclipse.org/webtools/downloads/drops/R3.37.0/R-3.37.0-20250303081219/repository
https://download.eclipse.org/technology/epp/packages/2024-09/202409051200
https://download.eclipse.org/lsp4e/releases/0.27.4
https://download.eclipse.org/tools/cdt/releases/11.6
https://download.eclipse.org/egit/updates-7.1
https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/release/4.36.0
https://download.eclipse.org/wildwebdeveloper/releases/1.3.9
https://download.eclipse.org/lsp4e/releases/0.27.6
https://download.eclipse.org/mylyn/updates/release/4.5.0
https://download.eclipse.org/lsp4j/updates/releases/0.23.1
https://download.eclipse.org/technology/m2e/releases/latest
https://download.eclipse.org/lsp4j/updates/releases/0.24.0
https://download.eclipse.org/eclipse/updates/4.35
https://www.codetogether.com/updates/ci/
https://download.eclipse.org/tm4e/releases/0.14.1
https://download.eclipse.org/webtools/downloads/drops/R3.38.0/S-3.38RC1-20250601070120/repository
https://download.eclipse.org/modeling/emf/emf/builds/release/2.42.0
https://download.eclipse.org/tm4e/releases/0.15.0
https://download.eclipse.org/technology/epp/packages/latest/
https://download.eclipse.org/releases/2024-09/202409111000
https://download.eclipse.org/releases/latest
https://download.eclipse.org/tm4e/releases/0.14.0
https://download.eclipse.org/modeling/emf/emf/builds/release/2.40.0
https://download.eclipse.org/oomph/updates/milestone/latest
https://boothen.github.io/Json-Eclipse-Plugin/
https://download.eclipse.org/eclipse/updates/4.37```

[merks]

I'm not sure a lot of testing ever gets done with things dropped into the dropins folder. I expect something is hoping to find it in an actual p2 repository and is not looking in the dropins folder at all. 😞

I've never tried the following manual approach, but it's worth a try if the installation is hosed anyway. The profiles are stored here (assuming you unzipped a package), and I think it's possible to delete the newest *.profile.gz and then when Eclipse starts it will use the next oldest one that left in the folder:

If you used the installer with a shared bundle pool, the profiles will be in the ~/.p2/org.eclipse.equinox.p2.engine/profileRegistry folder with a name that corresponds to the disk location of the installation, e.g.,

I hope that works!

[M-Marvin]

I ended up just extracting the eclipse installation folder from the zip I downloaded from the Eclipse website, and installing all my plugins again, all the configurations are stored per project anyway (which really annoys me, but I guess is a good thing this time).

But this seems like a pretty big oversight in the "revert" Feature to me.

[laeubi]

@M-Marvin have you tried removing the plugin from the dropins folder?

[M-Marvin]

Yes, the problem is that the plugin was installed when the "checkpoint" was created to which I want to revert.
I tried different things, but could not get it to ignore that plugin.

I can't to any more tests now, since I deleted and reinstalled it completely.
I am not entirely sure, should I close this issue now ?
The underlying problem is not really solved, although my installation is fixed (well, as fixed as it can be without the plugin which made me reverting being updated).

I think there should simply be an popup added, which asks what to do if some artifact could not be located when reverting back to an previous version.
Like "The plugin XY could not be located, do you want to continue without this plugin? Yes/No/Select local File" (Where the option "Select local File" might give the ability to just select a local copy of that file, or to add an additional URL to the search path if that is possible)

[merks]

It's actually an issue for p2 not the Platform:

https://github.com/eclipse-equinox/p2/issues

It seems like quite a tricky problem to me because there doesn't really exist a p2 repository for the artifact, just a folder where some dropins were dropped. I could imagine spending many days trying to find a workaround assuming I can easily reproduce the problem in the first place. So while you are of course welcome to create an issue in p2 and indeed it seems good to record this problem there, I can't move this one to another GitHub organization, so I'll close this one.

It's an unfortunate reality that no one is likely to have the resource to prioritize fixing such a problem. In a better world there would be more people with more time to provide better service. ☹️

---

For what it's worth, all IDEs that I set up I set up with Oomph so that I can create a new one from scratch automatically in just a few minutes:

https://eclipse.dev/oomph/?file=Authoring_Guide.md

But that's quite some learning curve and not really a consolation for the hassle you've faced. Sorry about that. 😢

[ppazos]

I did the same update from 2025-06 and it's still 2025-06 not 09.

[merks]

It also depends on what else is installed. I’ve updated at least 20 installations on my machine. A notification reminds me to do that. But I only have content from SimRel installed and those all do allow for updates.