The vscjava.vscode-java-test extension is throwing an error on startup in the latest preview version of the vscode-java extension.

[mozhuanzuojing]

env

[Trace - 7:27:43 PM] Received notification 'window/logMessage'.
[Error - 7:27:43 PM] Nov 28, 2025, 7:27:43 PM Failed to load extension bundles 
org.eclipse.core.runtime.CoreException: Load bundle list
	at org.eclipse.jdt.ls.core.internal.handlers.BundleUtils.loadBundles(BundleUtils.java:175)
	at org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:99)
	at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:72)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:286)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:128)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:271)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:201)
	at org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:91)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Contains: Bundle startup failed reference:file:/home/g/.vscode-server-insiders/extensions/vscjava.vscode-java-test-0.43.2025040304/server/org.jacoco.core_0.8.13.202504020838.jar
org.osgi.framework.BundleException: Could not resolve module: org.jacoco.core [116]
  Unresolved requirement: Import-Package: org.objectweb.asm; version="[9.8.0,9.9.0)"

	at org.eclipse.osgi.container.Module.start(Module.java:495)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:471)
	at org.eclipse.jdt.ls.core.internal.handlers.BundleUtils.startBundles(BundleUtils.java:310)
	at org.eclipse.jdt.ls.core.internal.handlers.BundleUtils.loadBundles(BundleUtils.java:173)
	at org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:99)
	at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:72)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:286)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:128)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:271)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:201)
	at org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:91)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Contains: Bundle startup failed reference:file:/home/g/.vscode-server-insiders/extensions/vscjava.vscode-java-test-0.43.2025040304/server/com.microsoft.java.test.plugin-0.43.1.jar
org.osgi.framework.BundleException: Could not resolve module: com.microsoft.java.test.plugin [117]
  Unresolved requirement: Require-Bundle: org.objectweb.asm; bundle-version="[9.8.0,9.9.0)"

	at org.eclipse.osgi.container.Module.start(Module.java:495)
	at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:471)
	at org.eclipse.jdt.ls.core.internal.handlers.BundleUtils.startBundles(BundleUtils.java:310)
	at org.eclipse.jdt.ls.core.internal.handlers.BundleUtils.loadBundles(BundleUtils.java:173)
	at org.eclipse.jdt.ls.core.internal.handlers.InitHandler.handleInitializationOptions(InitHandler.java:99)
	at org.eclipse.jdt.ls.core.internal.handlers.BaseInitHandler.initialize(BaseInitHandler.java:72)
	at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.initialize(JDTLanguageServer.java:286)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
	at java.base/java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$recursiveFindRpcMethods$0(GenericEndpoint.java:65)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.request(GenericEndpoint.java:128)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleRequest(RemoteEndpoint.java:271)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:201)
	at org.eclipse.jdt.ls.core.internal.ParentProcessWatcher.lambda$1(ParentProcessWatcher.java:91)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:185)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:97)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:114)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)

[Trace - 7:27:43 PM] Received notification 'telemetry/event'.
[Trace - 7:27:43 PM] Received request 'window/workDoneProgress/create - (6)'.

[github-actions]

Hi mozhuanzuojing, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

Here are a few suggestions to work around the startup failure and track progress:

• Use the stable Java Extension Pack instead of the preview. In the Extensions view for “Extension Pack for Java (pre-release)”, click Switch to Release Version to get the matching bundles for vscjava.vscode-java-test.
• Downgrade the Test Runner for Java extension to the last known working version (e.g. 0.42.x). You can run in VS Code:

  ext install vscjava.vscode-java-test@0.42.2025040200
  

• Wait for an updated preview that aligns the ASM version exported by JDT LS with what the test plugin requires.

A related issue where the test UI also fails with “Load bundle list”:

• Test UI does not load nor are tests found in Test Explorer (#1688)

Other references with low confidence

• Not Starting Up Properly Probably Due to Unix Domain Socket Length Limitations – Java extension hangs on startup in Insiders (#3371)

The team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!

[wenytang-ms]

mozhuanzuojing thank you for reporting this bug, I'm working on this issue.

[wenytang-ms]

Hi mozhuanzuojing we already ship the new prerelease of vscode-java-test, you may upgrade to the latest version and verify such issue. thanks!

[mozhuanzuojing]

Hi wenyt (@wenytang-ms) I've already started using it, thank you so much!