Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Extension never activates, throwing error "Header must provide a Content-Length property"

See original GitHub issue

As per the title, the extension never activates; the java language server status never switches to the thumbs-up. The extension runtime status shows 37 copies of the same uncaught error: Header must provide a Content-Length property. The developer tools logs show the same error, slightly more verbosely:

workbench.desktop.main.js:2272 Error: Header must provide a Content-Length property.
	at p.onData (c:\Users\Eric.Andrews\.vscode\extensions\redhat.java-1.8.0-win32-x64\dist\extension.js:2:1138205)
	at Socket.<anonymous> (c:\Users\Eric.Andrews\.vscode\extensions\redhat.java-1.8.0-win32-x64\dist\extension.js:2:1137926)
	at Socket.emit (node:events:390:28)
	at addChunk (node:internal/streams/readable:315:12)
	at readableAddChunk (node:internal/streams/readable:289:9)
	at Socket.Readable.push (node:internal/streams/readable:228:10)
	at Pipe.onStreamRead (node:internal/stream_base_commons:199:23)

Environment

Operating System: Windows 10 Enterprise (10.0.19044)
JDK version: Eclipse Adoptium 17.0.3.7-hotspot
Visual Studio Code version: 1.69.2
Java extension version: 1.8.0

Steps To Reproduce

Install jdk and VSCode
Install the Extension Pack for Java
Update settings.json to point to jdk: "java.jdt.ls.java.home": "C:\\Program Files\\Eclipse Adoptium\\jdk-17.0.3.7-hotspot"
Open any .java file

language server logs dev tools console logs

Issue Analytics

State:
Created a year ago
Reactions:1
Comments:19 (1 by maintainers)

Top GitHub Comments

13reactions

muchida6commented, Aug 9, 2022

In my case, adding -Xlog:jni+resolve=off to java.jdt.ls.vmargs solved this problem.

languageclient has receiving rpc response with error messages as follows.

[0.158s][warning][jni,resolve] Re-registering of platform native method: java.lang.PanwHooks.NativeMethodEntry(Ljava/lang/Object;ILjava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)V from code in a different classloader
Content-Length: 780

PanwHooks seems to be related to Palo Alto Networks products, which this product seems to injecting DLLs into the JVM.

4reactions

MarcSerret51commented, Aug 9, 2022

I’m getting the same error. The workaround given by @muchida6 worked for me. @sudheerkkumar To add this config line you have to go to Setting and type java.jdt.ls.vmargs and click Edit in settings.json.

Top Results From Across the Web

Why does my JavaScript code receive a "No 'Access-Control ...

I know that the API or remote resource must set the header, but why did it work when I made the request via...

5.x API - Express.js

Alterations to the headers must occur synchronously. ... When a callback function throws an error or returns a rejected promise, `next(err)` will be...

Request · Cloudflare Workers docs

This code snippet will throw during script startup, and the "fetch" event listener will never be registered. Set the Content-Length header.

API — Flask Documentation (2.2.x)

The idea of the first parameter is to give Flask an idea of what belongs to your application. ... The key must match...

Web on Servlet Stack - Spring

If you use XML-based Spring configuration, you should extend directly from ... are used to resolve exceptions thrown during request processing.