Cannot find the class file for javax.servlet.http.HttpServletResponse.

[safield]

• Operating System: Ubuntu 20.04
• JDK version: openjdk 11.0.11
• Visual Studio Code version: 1.60.1
• Java extension version: v0.82.0

I have a java project that uses gradle. This project worked well with the java extension for a long time.

Now, when I run './gradlew assemble' from the command line, the project builds successfully.

When I load the project in VSCode I get the following errors...

{
	"resource": "/myproj//java_server",
	"owner": "_generated_diagnostic_collection_name_#1",
	"code": "0",
	"severity": 8,
	"message": "The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.http.HttpServletResponse. Fix the build path then try building this project",
	"source": "Java",
	"startLineNumber": 1,
	"startColumn": 1,
	"endLineNumber": 1,
	"endColumn": 1
}
{
	"resource": "/myproj/java_server/src/main/java/framework/MessageHandler.java",
	"owner": "_generated_diagnostic_collection_name_#1",
	"code": "16777540",
	"severity": 8,
	"message": "The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referenced from required .class files",
	"source": "Java",
	"startLineNumber": 1,
	"startColumn": 1,
	"endLineNumber": 1,
	"endColumn": 2
}

[rgrunber]

Do you have the project available somewhere to try out ? I've seen such issues when the project expects to use some version of J2EE but maybe only J2SE is being resolved. Does the problem go away if you explicitly add a dependency from something like https://search.maven.org/artifact/jakarta.servlet/jakarta.servlet-api ?

[safield]

I have had no luck with explicitly adding dependencies.

Here is a minimal reproduction example.

repro_example.zip

[safield]

Also, I don't think this should have 'question' label, as it is a bug with a repro case.

[fbricon]

Works for me

[fbricon]

Try the "Java: Clean Java Language Server Workspace" command

[safield]

Works for me

Are you running Ubuntu 20.04 with OpenJDK 11?

[rgrunber]

I'm also able to reproduce, regardless of JDK, on Fedora 34. Strangely, the project resolves and the HttpServletResponse is even located with go-to definition. Note, that I had to add the IOException, ServletException classes to the imports, or else this would just produce a compilation error for me, even on commandline with ./gradlew assemble.

However, I clearly see 2 errors : On MessageHandler.java : "The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referenced from required .class files" On the project : The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.http.HttpServletResponse. Fix the build path then try building this project

I also noticed the gradle wrapper validation kept flagging the project's version as untrusted, so I ran ./gradlew wrapper and it seemed to make some modifications. Once, I tried importing the project again (after clearing the language server workspace, the errors disappared). Can you try running this to see if it solves the issue for you ?

[safield]

I'm also able to reproduce, regardless of JDK, on Fedora 34. Strangely, the project resolves and the HttpServletResponse is even located with go-to definition. Note, that I had to add the IOException, ServletException classes to the imports, or else this would just produce a compilation error for me, even on commandline with ./gradlew assemble.

However, I clearly see 2 errors : On MessageHandler.java : "The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referenced from required .class files" On the project : The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.http.HttpServletResponse. Fix the build path then try building this project

I also noticed the gradle wrapper validation kept flagging the project's version as untrusted, so I ran ./gradlew wrapper and it seemed to make some modifications. Once, I tried importing the project again (after clearing the language server workspace, the errors disappared). Can you try running this to see if it solves the issue for you ?

These are the two errors I am seeing. In addition, I also continually get the untrusted dialog popping up as well.

I should also add, that this project worked for years on older versions of the extension.

[rgrunber]

Does the problem go away if you run ./gradlew wrapper from commandline to update the wrapper jar (as mentioned above) ? It completely solved the errors for me.

[foxpluto]

I have a similar problem with MAC:

[Error - 12:48:07 PM] Nov 2, 2021, 12:48:07 PM Error occured while building workspace. Details: 
 message: The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.ServletException. Fix the build path then try building this project; code: 0; resource: /Users/fox/Documents/workspace/plcProject/chronos;
 message: The type javax.servlet.ServletException cannot be resolved. It is indirectly referenced from required .class files; code: 16777540; resource: /Users/fox/Documents/workspace/plcProject/chronos/src/main/java/it/fox/chronos/webgui/ControlJetty.java; line: 1
 message: The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.Servlet. Fix the build path then try building this project; code: 0; resource: /Users/fox/Documents/workspace/plcProject/hermes;
 message: The type javax.servlet.Servlet cannot be resolved. It is indirectly referenced from required .class files; code: 16777540; resource: /Users/fox/Documents/workspace/plcProject/hermes/src/main/java/it/fox/hermes/JettyServer.java; line: 1
[Error - 12:57:59 PM] Nov 2, 2021, 12:57:59 PM Error occured while building workspace. Details: 
 message: The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.ServletException. Fix the build path then try building this project; code: 0; resource: /Users/fox/Documents/workspace/plcProject/chronos;
 message: The type javax.servlet.ServletException cannot be resolved. It is indirectly referenced from required .class files; code: 16777540; resource: /Users/fox/Documents/workspace/plcProject/chronos/src/main/java/it/fox/chronos/webgui/ControlJetty.java; line: 1
 message: The project was not built since its build path is incomplete. Cannot find the class file for javax.servlet.Servlet. Fix the build path then try building this project; code: 0; resource: /Users/fox/Documents/workspace/plcProject/hermes;
 message: The type javax.servlet.Servlet cannot be resolved. It is indirectly referenced from required .class files; code: 16777540; resource: /Users/fox/Documents/workspace/plcProject/hermes/src/main/java/it/fox/hermes/JettyServer.java; line: 1

the trick of ./gradlew wrapper not worked.

Regards, S.

[foxpluto]

I have tried the demo project posted above and I have the exact problem reported here:

The type javax.servlet.http.HttpServletResponse cannot be resolved. It is indirectly referenced from required .class filesJava(16777540)

My Gradle dependencies are:

testRuntimeClasspath - Runtime classpath of source set 'test'.
+--- org.eclipse.jetty:jetty-servlet:9.4.19.v20190610
|    \--- org.eclipse.jetty:jetty-security:9.4.19.v20190610
|         \--- org.eclipse.jetty:jetty-server:9.4.19.v20190610
|              +--- javax.servlet:javax.servlet-api:3.1.0
|              +--- org.eclipse.jetty:jetty-http:9.4.19.v20190610
|              |    +--- org.eclipse.jetty:jetty-util:9.4.19.v20190610 -> 9.4.29.v20200521
|              |    \--- org.eclipse.jetty:jetty-io:9.4.19.v20190610
|              |         \--- org.eclipse.jetty:jetty-util:9.4.19.v20190610 -> 9.4.29.v20200521
|              \--- org.eclipse.jetty:jetty-io:9.4.19.v20190610 (*)
+--- org.eclipse.jetty:jetty-client:9.4.19.v20190610
|    +--- org.eclipse.jetty:jetty-http:9.4.19.v20190610 (*)
|    \--- org.eclipse.jetty:jetty-io:9.4.19.v20190610 (*)
\--- org.eclipse.jetty:jetty-util:9.4.29.v20200521

Please, could you indicate me a workaround? I am stuck in a project I could not debug for this issue !!!

My info are:

• Operating System: Mac 11.2
• JDK version: OpenJDK Runtime Environment Temurin-11.0.13+8 (build 11.0.13+8)
• Visual Studio Code version: 1.61.2
• Java extension version: v1.0.0

Regards, S.

[safield]

@rgrunber Can you remove the question label and apply an appropriate one?

[rgrunber]

Can you retry the project with the latest release, v1.1.0. The errors disappear for me every time I update to the newer release.