[Java, full] Language Server not working/starting

[Allwin-Backya]

Description
I created a container from theia image and created a java file. But, auto suggestion is not working.

Error
Failed to start java language server.

[marcdumais-work]

@Allwin-Backya,

Thanks for reporting this issue. I have reproduced outside of Docker, using Theia's main repo example application. So it looks like this is a generic issue, not one specific to this docker image.

I opened a corresponding issue in the main repo: eclipse-theia/theia#6906
We can keep this issue here until a fix trickles-down and the docker image is fixed as well.

In the meantime, you could try an older pre-build image from dockerhub

[Allwin-Backya]

@marcdumais-work
Thanks for your suggestion. But i have done some customization in my docker file. Is there any other solution.

[marcdumais-work]

Hi @Allwin-Backya ,

I assume you modified the Dockerfile in-place? An alternate way would be to extend one version of the image that works. i.e. assuming this ~1 month old version of the image works correctly theiaide/theia-java:0.14.0-next.f54e970d:

FROM theiaide/theia-java:0.14.0-next.f54e970d
<add your customizations>
<add your customizations>
<...>
WORKDIR /home/theia
ENTRYPOINT [ "yarn", "theia", "start", "/home/project", "--hostname=0.0.0.0" ]

Also a heads-up: we are in the process of replacing spme Theia-specific language extensions by the equivalent or better VS Code extensions, including for Java. So it may not be worth it at this point to fix issues such as this one, with the legacy Theia-specific Java support. So the fix in the end may end-up being the switch to VS Code extensions. If that's the case, you'll need to uplift your version of this image.

ETA: hopefully this week.

[Allwin-Backya]

@marcdumais-work
Thank you so much. If the fix for this issue goes by this week, then no problem. But if the fix takes too long, I need to go by the way you suggested. You have suggested old version of Theia-Java. Will it also work for theia-full. If so, can you suggest some old version for theia-full.

[marcdumais-work]

@marcdumais-work
You have suggested old version of Theia-Java. Will it also work for theia-full. If so, can you suggest some old version for theia-full.

Yes, the same strategy should work for theia-full. I have not tested that the older image actually works, but it seems likely it would. For theia-full, this one would be a good candidate to test: theiaide/theia-full:0.14.0-next.f54e970d.

Generally, you can look here and try older images until you find one that works.

[Allwin-Backya]

@marcdumais-work
Thank you. Will the fix go by this week, cauz i am doing a application based on this. If so, where can i get the information regarding the fix.

[marcdumais-work]

@marcdumais-work
Thank you. Will the fix go by this week, cauz i am doing a application based on this.

I hope so but can't promise.

If so, where can i get the information regarding the fix.

Just watch this issue here - it will be referred-to from the PR that will fix the issue, so you'll see this issue be closed when a fix is in place.

[Allwin-Backya]

@marcdumais-work
I have tried it with a previous build image,still i am not getting suggestion.

[marcdumais-work]

@Allwin-Backya Can you share which one you tried? I am not sure when this breakage happened, but it should not have been so long ago.

[Allwin-Backya]

@marcdumais-work
I have tried this image theiaide/theia:0.13.0-next.b92a5673.

[marcdumais-work]

Hi @Allwin-Backya ,

theiaide/theia is the base image that supports only JavaScript/TypeScript development. If you want Java, you have to use either theiaide/theia-java or theiaide/theia-full.

[marcdumais-work]

The theia-java image should be good now, since we merged #287. The full image is being updated in a similar way.