Symbol lookup in Java shows duplicates

[rajinder-yadav]

Type: Bug

When I try to look up a Symbol in a Java project, I am seeing duplicate.

For example, type: CTRL+p to bring up the command field, then type, "#ArrayList".

Extension version: 1.36.0
VS Code version: Code - Insiders 1.96.0-insider (4a98be2738be4ad8647feb52d1e6845e06515dea, 2024-11-08T09:56:49.748Z)
OS version: Linux x64 6.11.6-2-default
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 9 5900X 12-Core Processor (24 x 4499)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off webnn: disabled_off
Load (avg)	0, 0, 0
Memory (System)	62.71GB (48.55GB free)
Process Argv	. --crash-reporter-id 16b87d92-ec94-4851-bc93-3fb4ac5a3bf3
Screen Reader	no
VM	0%
DESKTOP_SESSION	plasma6
XDG_CURRENT_DESKTOP	KDE
XDG_SESSION_DESKTOP	KDE
XDG_SESSION_TYPE	x11

A/B Experiments

vsliv368:30146709
vspor879:30202332
vspor708:30202333
vspor363:30204092
vsc_aa:30263845
vscod805cf:30301675
vsaa593cf:30376535
py29gd2263:31024238
c4g48928:30535728
2i9eh265:30646982
962ge761:30841072
pythongtdpath:30726887
pythonnoceb:30776497
asynctok:30898717
dsvsc014:30777825
dsvsc015:30821418
pythonmypyd1:30859725
h48ei257:31000450
pythontbext0:30879054
cppperfnew:30980852
pythonait:30973460
01bff139:31013167
dvdeprecation:31040973
dwnewjupyter:31046869
nb_pri_only:31057983
nativerepl1:31134653
refactort:31084545
pythonrstrctxt:31093868
nativeloc1:31118317
cf971741:31144450
e80f6927:31120813
i21gd607:31141543
iacca1:31150324
notype1:31143044
dwcopilot:31158714
h409b430:31177054

[snjeza]

@rajinder-yadav Could you try VS Code 1.95.x ?

[rgrunber]

Should have been fixed in #3452 , unless this is a different case. Can you share the sample project for which this occurs ? Is it managed by Maven, Gradle, or is it just an unmanaged project (folders and source files, no build tool). Does your project configure 2 different Java versions ?

You could try following the instructions at #3452 (comment) . Basically that would help us confirm that it is in fact 2 separate JDKs that are being picked up (based on the URI).

Update: One way I can reproduce this behaviour is by taking a Maven multi-module project, where two modules configure different compiler/source versions. You'll end up getting what appears to be duplicate classes when in fact they're just coming from different JDKs. More generally, in #3452 (comment) , I left a note that where a project depends on different versions of the same library, we should probably modify the workspace symbol entry to list the version so it's more clear what's going on.

[rajinder-yadav]

Well it's somewhat fixed, still seeing double entries for some symbols. Is the 2nd one really necessary?

I believe I was using a nobuild project, but I also tried maven no architype project.

Version info

Version: 1.96.0-insider
Commit: 4a98be2738be4ad8647feb52d1e6845e06515dea
Date: 2024-11-08T09:56:49.748Z
Electron: 32.2.1
ElectronBuildId: 10427718
Chromium: 128.0.6613.186
Node.js: 20.18.0
V8: 12.8.374.38-electron.0
OS: Linux x64 6.11.6-2-default

[rgrunber]

java.util.Arrays.ArrayList is a private nested class that is not a duplicate of java.util.ArrayList. It's used to implement Arrays.asList(..) ensuring that the resulting list is fixed-size. It's a bit less obvious because the package name is in smaller font, but libraries can have classes that are the same name, but in different packages.

[rajinder-yadav]

@rgrunber thanks for clearing that up. I am going to close this bug.