Vscode-java: Problem with codeComplete when typing "HashMap" in package-less classes

Created on 17 Mar 2017 · 39Comments · Source: redhat-developer/vscode-java

Java Language Support produces the following error message in the output pane whenever I start typing HashMap.

[Error - 11:09:35 am] 17/03/2017 10:53:22 AM Problem with codeComplete for
String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.<init>(String.java:196)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:400)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:379)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.updateDescription(CompletionProposalDescriptionProvider.java:583)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.toCompletionItem(CompletionProposalRequestor.java:68)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.getCompletionItems(CompletionProposalRequestor.java:54)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.computeContentAssist(CompletionHandler.java:80)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.lambda$0(CompletionHandler.java:39)
    at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
    at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

Environment

Operating System: Windows 10
JDK version: 8.91
Visual Studio Code version: 1.10.2
Java extension version: 0.0.12

Steps To Reproduce

Start typing "HashMap"

bug content-assist

Source

Aaron216

All 39 comments

Did you see this behaviour before?
Does it happen for other types?
Can you reproduce with a simple class/project?

fbricon on 17 Mar 2017

This behaviour started when I updated the Java Language Support Extension.

Also happens when typing "for" with the following error message:

[Error - 11:21:42 am] 17/03/2017 10:53:22 AM Problem with codeComplete for file:///<<FILE PATH HERE>>/Reader.java
String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.<init>(String.java:196)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:400)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:379)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.updateDescription(CompletionProposalDescriptionProvider.java:583)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.toCompletionItem(CompletionProposalRequestor.java:68)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.getCompletionItems(CompletionProposalRequestor.java:54)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.computeContentAssist(CompletionHandler.java:80)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.lambda$0(CompletionHandler.java:39)
    at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
    at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

I also recently uninstalled Visual Studio 2017 Community. Could that have caused this issue?

Aaron216 on 17 Mar 2017

I just tried a new simple class to see if the error would still occur.
This time it happened when I started typing "String" with the following error message:

[Error - 11:27:37 am] 17/03/2017 11:26:25 AM Problem with codeComplete for file:///c%3A/Users/aaron/OneDrive/Temp/Test.java
String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.<init>(String.java:196)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:400)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:379)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.updateDescription(CompletionProposalDescriptionProvider.java:583)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.toCompletionItem(CompletionProposalRequestor.java:68)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.getCompletionItems(CompletionProposalRequestor.java:54)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.computeContentAssist(CompletionHandler.java:80)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.lambda$0(CompletionHandler.java:39)
    at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
    at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

Aaron216 on 17 Mar 2017

Can you set the java.trace.server setting to verbose, and attach the logs here please?

fbricon on 17 Mar 2017

Here are the logs. The error that I mention is logged at line number 15283.
JavaLogs.txt

Aaron216 on 17 Mar 2017

Looks like the issue is could be with my Classpath. I had a look at the settings and found that this error was being suppressed: "Classpath is incomplete. Only syntax errors will be reported".

Aaron216 on 18 Mar 2017

I have the same problem. Seems to happen randomly every 5-10 minutes at most. Adding a pom.xml file didn't help, this started with 0.12 and has made the extension unusable for me...

matrl0 on 18 Mar 2017

There was a severe regression in the Java Language server (eclipse/eclipse.jdt.ls#191) used in vscode-java 0.0.12. We released a fix with 0.0.13. Please update your vscode java extension

fbricon on 18 Mar 2017

I too am having the idendential error with code completion, running on Ubuntu 16.04. The issue occurs whenever I start typing anything on a new line.

james-black on 18 Mar 2017

Updating to 0.0.13 didn't help, got the issue again just this morning after updating and restarting.

matrl0 on 18 Mar 2017

Please try deleting %APPDATA%\Code\User\workspaceStorage (or ~/Library/Application Support/Code/User/workspaceStorage on MacOS) and restart vscode

fbricon on 18 Mar 2017

The problem seems to persist still for me.

matrl0 on 18 Mar 2017

I solved my issue: the extension automatically generated some project files when I was still using 0.0.12, removing them fixed the problem.

matrl0 on 18 Mar 2017

@Aaron216 @james-black do you guys still see the issue or can we close this ticket ?

fbricon on 18 Mar 2017

The issue seems to be resolved for me

james-black on 18 Mar 2017

Updating to 0.0.13 did not resolve the issue.
Deleting files in %APPDATA%\Code\User\workspaceStorage seems to have fixed it though.
Feel free to close the ticket.

Thank you for your help.

Aaron216 on 19 Mar 2017

Ubuntu 16.04 here, unfortunately this problem still persists, it occurs when i start typing String or (sometimes) something else...i've already removed workspaceStorage folder, uninstall/install plugin, but nothing happens
@matrl0 what files you removed?

csalv5 on 21 Mar 2017

I started experiencing this issue again too.
I have now re-installed VS code and the Java Support extension but the issue persists.

Aaron216 on 21 Mar 2017

Sorry, but we can't reproduce this issue so this makes it very hard to troubleshoot.
So, can you please attach your zipped workspace here, as well as the project including whatever eclipse files were generated?

fbricon on 21 Mar 2017

Another thing you guys can try, after deleting the workspace storage, you can also delete the project .project, .classpath and settings ressources

fbricon on 21 Mar 2017

Hi @fbricon, can you be a little bit more specific? Do you mean workspaceStorage folder?
where .project and .classpath are located?

Sorry for dumb questions

csalv5 on 21 Mar 2017

👍1

I'm also getting this error on Arch Linux 64-bit. Latest extension version and Visual Studio code version.

obviously the problem is in the FindSimpleNameSmart method in this file:
https://github.com/eclipse/eclipse.jdt.ls/blob/master/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/contentassist/CompletionProposalDescriptionProvider.java#L422

The fullName array either has: Nothing in it, A < symbol before a period or no periods.

hcorion on 25 Mar 2017

I have the same issue. Here are the logs, this error occurs whenever the autocomplete recommendations dropdown appears (pretty much all the time).

[Error - 11:39:22] 26.3.2017 11:35:49 Problem with codeComplete for file:///m%3A/Documents/FRI%202.%20letnik%202016-17/APS-2/Naloga1/src/Naloga1.java
String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.<init>(String.java:196)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:400)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.createTypeProposalLabel(CompletionProposalDescriptionProvider.java:379)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalDescriptionProvider.updateDescription(CompletionProposalDescriptionProvider.java:583)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.toCompletionItem(CompletionProposalRequestor.java:68)
    at org.eclipse.jdt.ls.core.internal.contentassist.CompletionProposalRequestor.getCompletionItems(CompletionProposalRequestor.java:54)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.computeContentAssist(CompletionHandler.java:80)
    at org.eclipse.jdt.ls.core.internal.handlers.CompletionHandler.lambda$0(CompletionHandler.java:39)
    at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
    at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

MatevzFa on 26 Mar 2017

Hmm, I wonder if the issue has something to do with having spaces in the path.

hcorion on 26 Mar 2017

I'm not sure if this is a related issue, but I recently noticed that I had not set the classpath variable. The following error would appear whenever the Java Language Sever started.

Classpath is incomplete. Only syntax errors will be reported

I have now attempted to set the "java.home" variable in VS code as follows.
"java.home":"C:\Program Files\Java\jdk1.8.0_91"
The above line is highlighted as an error in my settings.json file with the following error.

Invalid escape character in string

I believe the invalid character is "\" as when I remove all of the slashes, the warning goes away.
Though, I don't know how I'm meant to set a file path without using a slash character.
If I leave the slashes in the file path and ignore the syntax warning when I open VS code the following errors now appear whenever the Java Language Server attempts to start.

Couldn't start client Language Support for Java
The java.home variable defined in VS Code settings points to a missing folder

Hopefully, this is a simple error that I've made in setting up my environment.
Please let me know if there's an easy way to resolve this.

Aaron216 on 27 Mar 2017

@Aaron216 Try replacing the \ in the path with \\

hcorion on 27 Mar 2017

@hcorion Thanks. That's fixed the "Invalid escape character in string" warning and the "Couldn't start client Language Support for Java. The java.home variable defined in VS Code settings points to a missing folder" error that I was seeing at start-up.

But the "Classpath is incomplete. Only syntax errors will be reported" warning has returned whenever the Java Language Server starts.

Aaron216 on 27 Mar 2017

I'm getting this error as well, Elementary OS 0.4 Loki, which is built on Ubuntu 16.04. Latest VS Code version and extension version. It happens whenever the code completion engine starts, which as was said before, is all the time. What could I do to help solve this faster?

rugglcon on 28 Mar 2017

@rugglcon Does the path the java file is in contain any spaces, > symbols or . symbols?

hcorion on 28 Mar 2017

Yes it does.
On Mon, Mar 27, 2017 at 20:00 Zion notifications@github.com wrote:

@rugglcon https://github.com/rugglcon Does the path the java file is in
contain any spaces, > symbols or . symbols?

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
https://github.com/redhat-developer/vscode-java/issues/166#issuecomment-289629549,
or mute the thread
https://github.com/notifications/unsubscribe-auth/ANp3MmXQSDPw0N5MsS0MC8M5x1Gzkdvyks5rqFm3gaJpZM4MgIUZ
.

rugglcon on 28 Mar 2017

@fbricon
Allright, here is the trace log:
https://pastebin.com/HPKk4BvN
To reproduce this, open a file called test.java, and copy-paste the following text:

import java.util.ArrayList;
public class test
{
  public ArrayList<>
}

And to crash it, just add a S between <> just like you were going to type String

hcorion on 28 Mar 2017

🎉1

@hcorion excellent, I could reproduce the error. I'll investigate tomorrow

fbricon on 28 Mar 2017

This is caused by the project containing classes in the default package. The jdt.ls server doesn't check for that case in createTypeProposalLabel(char[] fullName, CompletionItem item), when appending the package separator

fbricon on 28 Mar 2017

Deleting classes located at C:\Program Files\Java\Classes and removing that path from my CLASSPATH system variable appears to have resolved the issue.

Aaron216 on 28 Mar 2017

Anyone willing to try a CI build of the fix, can download http://download.jboss.org/jbosstools/jdt.ls/staging/java-0.1.0.vsix and install it by following the instructions here.

fbricon on 29 Mar 2017

Sorry but our latest build is broken at this time. If the java extension never downloads the java language server, then

go to ~/.vscode/extensions/vscode-java-0.1.0
open src/server_archive.json
replace the url the latest jdt-language-server-.tar.gz url from http://download.eclipse.org/jdtls/snapshots/

fbricon on 29 Mar 2017

Same error. Pops up only when I'm like writing invalid code in the .java file.
The problem for me not that error appears (since well if it's not sure that file is like being just written from the scratch) but that output pops up, it's kinda annoying.

Overall great plugin guys!

idchlife on 14 Sep 2017

@idchlife can you paste your logs? Need to check if it's the exact same trace. Are you using the latest version?

fbricon on 14 Sep 2017

@fbricon actually I had some kind of same error, but now I'm having only one and it differs:

[Error - 00:22:30] Sep 14, 2017 6:51:43 PM 
null
org.eclipse.jface.text.BadLocationException
    at org.eclipse.jface.text.TreeLineTracker.fail(TreeLineTracker.java:1051)
    at org.eclipse.jface.text.TreeLineTracker.lineByOffset(TreeLineTracker.java:265)
    at org.eclipse.jface.text.TreeLineTracker.getLineNumberOfOffset(TreeLineTracker.java:1119)
    at org.eclipse.jface.text.AbstractLineTracker.getLineNumberOfOffset(AbstractLineTracker.java:151)
    at org.eclipse.jface.text.AbstractDocument.getLineOfOffset(AbstractDocument.java:868)
    at org.eclipse.core.internal.filebuffers.SynchronizableDocument.getLineOfOffset(SynchronizableDocument.java:331)
    at org.eclipse.jdt.ls.core.internal.handlers.JsonRpcHelpers.toLine(JsonRpcHelpers.java:57)
    at org.eclipse.jdt.ls.core.internal.JDTUtils.toRange(JDTUtils.java:402)
    at org.eclipse.jdt.ls.core.internal.JDTUtils.toLocation(JDTUtils.java:338)
    at org.eclipse.jdt.ls.core.internal.JDTUtils.toLocation(JDTUtils.java:300)
    at org.eclipse.jdt.ls.core.internal.handlers.DocumentSymbolHandler.collectChildren(DocumentSymbolHandler.java:76)
    at org.eclipse.jdt.ls.core.internal.handlers.DocumentSymbolHandler.collectChildren(DocumentSymbolHandler.java:68)
    at org.eclipse.jdt.ls.core.internal.handlers.DocumentSymbolHandler.getOutline(DocumentSymbolHandler.java:52)
    at org.eclipse.jdt.ls.core.internal.handlers.DocumentSymbolHandler.documentSymbol(DocumentSymbolHandler.java:44)
    at org.eclipse.jdt.ls.core.internal.handlers.JDTLanguageServer.lambda$9(JDTLanguageServer.java:319)
    at java.util.concurrent.CompletableFuture.uniApply(CompletableFuture.java:602)
    at java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:577)
    at java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:443)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

idchlife on 14 Sep 2017

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