Failed to run config for nvim-java error

When I open my Nvim I get this error:

Failed to run `config` for nvim-java                                                                                                                                                                                                                                                                                      ...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:132: attempt to index local 'location' (a function value)                                                                                                                                                                                                     # stacktrace:                                                                                                                                                  - mason.nvim\lua\mason-core\package\AbstractPackage.lua:132 _in_ **get_receipt**                                                                             - mason.nvim\lua\mason-core\package\AbstractPackage.lua:168 _in_ **get_installed_version**                                                                   - lua/config/lazy.lua:25                                                                                                                                     - init.lua:2

My config files:

vim.lsp.enable({ "jdtls" }) -- Error persists with or without this line

lazy.nvim specs:

nvim-java

return { 
  "nvim-java/nvim-java",
  dependencies = {
    "williamboman/mason.nvim",
    "williamboman/mason-lspconfig.nvim",
    "neovim/nvim-lspconfig",
    "mfussenegger/nvim-dap"
  },
  opts = {
    jdk = { auto_install = false }
  },
  priority = 100
}

mason

return { "mason-org/mason.nvim" }

Hi, I'm also getting some errors which are triggered by the call to require('java').setup({}):

Error detected while processing /home/davy/.config/nvim/init.lua:
E5113: Error while calling lua chunk: ...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:132: attempt to index local 'location' (a function value)
stack traceback:
        ...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:132: in function 'get_receipt'
        ...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:168: in function 'get_installed_version'
        ...local/share/nvim/lazy/nvim-java/lua/java/utils/mason.lua:18: in function 'is_available'
        ...local/share/nvim/lazy/nvim-java/lua/java/utils/mason.lua:49: in function 'is_outdated'
        ...share/nvim/lazy/nvim-java/lua/java/startup/mason-dep.lua:27: in function 'install'
        /home/davy/.local/share/nvim/lazy/nvim-java/lua/java.lua:35: in function 'setup'
        /home/davy/.config/nvim/init.lua:545: in main chunk

This is very likely related to Mason's breaking changes https://github.com/mason-org/mason-lspconfig.nvim/blob/main/CHANGELOG.md#200-2025-05-06 .

Hi, I'm also getting some errors which are triggered by the call to require('java').setup({}):

Error detected while processing /home/davy/.config/nvim/init.lua:
E5113: Error while calling lua chunk: ...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:132: attempt to index local 'location' (a function value)
stack traceback:
...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:132: in function 'get_receipt'
...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:168: in function 'get_installed_version'
...local/share/nvim/lazy/nvim-java/lua/java/utils/mason.lua:18: in function 'is_available'
...local/share/nvim/lazy/nvim-java/lua/java/utils/mason.lua:49: in function 'is_outdated'
...share/nvim/lazy/nvim-java/lua/java/startup/mason-dep.lua:27: in function 'install'
/home/davy/.local/share/nvim/lazy/nvim-java/lua/java.lua:35: in function 'setup'
/home/davy/.config/nvim/init.lua:545: in main chunk
This is very likely related to Mason's breaking changes https://github.com/mason-org/mason-lspconfig.nvim/blob/main/CHANGELOG.md#200-2025-05-06 .

I'm running into the same issue

@s1n7ax

@s1n7ax Same here. Seems to be incompatible with mason 2.0.

Failed to run `config` for nvim-java

...zy/mason.nvim/lua/mason-core/package/AbstractPackage.lua:132: attempt to index local 'location' (a function value)

# stacktrace:
  - /mason.nvim/lua/mason-core/package/AbstractPackage.lua:132 _in_ **get_receipt**
  - /mason.nvim/lua/mason-core/package/AbstractPackage.lua:168 _in_ **get_installed_version**
  - lua/base/utils/init.lua:318

Full mason v2 changelog:
https://github.com/mason-org/mason.nvim/blob/main/CHANGELOG.md

PR shipped. It can be tested here:
#376

@Zeioth

@Zeioth I've made the change locally, but I'm still encountering different error like

@Zeioth

@Zeioth I can confirm that it works!!

I have another issue, but I don't know if it is related to this issue, this PR or nvim-java in general:
When I start Neovim, Mason opens and although it shows jdtls as installed, it tries to install it and repots the download error [4/4] Failed to download file "https://download.eclipse.org/jdtls/milestones/1.43.0/jdt-language-server-1.43.0-202504011455.tar.gz"

@Zeioth

@Zeioth
Additionally I have changed 2 files to make it work and they were

nvim-java-core/lua/java-core/ls/servers/jdtls/init.lua

from this method

local jdk = mason_reg.get_package('openjdk-17')

if jdk:is_installed() then
local java_home = vim.fn.glob(path.join(jdk:get_install_path(), '/jdk-17*'))
local java_bin = path.join(java_home, '/bin')

base_config.cmd_env = {
['PATH'] = vim.fn.getenv('PATH') .. ':' .. java_bin,
['JAVA_HOME'] = java_home,
}
end

to

local jdk = mason_reg.get_package('openjdk-17')

if jdk:is_installed() then
local java_home = vim.fn.glob(vim.fn.expand("$MASON/packages/openjdk-17/jdk-17*"))
local java_bin = path.join(java_home, '/bin')

base_config.cmd_env = {
['PATH'] = vim.fn.getenv('PATH') .. ':' .. java_bin,
['JAVA_HOME'] = java_home,
}
end

nvim-java-core/lua/java-core/utils/mason.lua

local mason_registry = require('mason-registry')

local M = {}

---Returns the path to the package in mason packages
---@param pkg_name string
---@return string | nil
function M.get_pkg_path(pkg_name)
-- CHANGED: Replaced deprecated get_install_path() with manually constructed path
local mason_data_path = vim.fn.stdpath("data") .. "/mason/packages/" .. pkg_name
return mason_data_path
end

---Returns true if the package is installed in mason
---@param pkg_name string
---@return boolean
function M.is_pkg_installed(pkg_name)
-- CHANGED: Used pcall to safely check if package exists and avoid runtime errors
local ok, pkg = pcall(mason_registry.get_package, pkg_name)
return ok and pkg:is_installed()
end

---Returns the shared artifact path for a given package
---@param pkg_name string name of the package to get the path of
---@return string # path to the shared artifact directory of the package
function M.get_shared_path(pkg_name)
-- CHANGED: Replaced use of shell variable $MASON with Neovim's standard path function
local mason_share_path = vim.fn.stdpath("data") .. "/mason/share/" .. pkg_name
return mason_share_path
end

return M

this configuration will replace mason2.0.0 api than older mason braking api changes and it works well for me

@Kabil777

@Kabil777 I've reviewed and it looks good to me. I've also looked into every other sub-project of nvim-java and I can't find any other change required.

Why not sending the PR to https://github.com/nvim-java/nvim-java-core ?

Here is my PR to nvim-java-core

I'm also looking for nvim-javagenie feature in nvim-java which provides feature of jpa-buddy plugin in intelij-idea

Can someone help how to tie nvim-java with lspconfig and mason.nvim?

From the main page of GitHub

Setup nvim-java before lspconfig

Here is my config:

-- nvim\lua\plugins\nvim-java.lua
return {
  "nvim-java/nvim-java",
  dependencies = {
    "neovim/nvim-lspconfig",
  }
}

-- nvim\lua\plugins\lsp.lua
return {
  {
    "neovim/nvim-lspconfig"
  },
  {
    "mason-org/mason.nvim",
    opts = {}
  },
  {
    "mason-org/mason-lspconfig.nvim",
    dependencies = {
      "neovim/nvim-lspconfig",
      "mason-org/mason.nvim"
    },
    opts = {
      ensure_installed = {
        "jdtls"
      }
    }
  }
}

I don't know where to call require('java').setup()?

@cmon1701

@cmon1701 I got the same issue.

https://download.eclipse.org/jdtls/milestones/1.43.0/jdt-language-server-1.43.0-202504011455.tar.gz the url verson number is not correct, it should be 1.46.1.

Check Mason 2.0 realease note.

local registry = require("mason-registry")
local pkg = registry.get_package("lua-language-server")
local latest_version = pkg:get_latest_version()

get_latest_version() will return package lastest version.

PR

local installed_version = pkg:get_installed_version()
is_installed = installed_version == package_version

change to

local installed_version = pkg:get_installed_version()
is_installed = installed_version == pkg:get_lateset_version()

@JameChou

@JameChou If you keep backtracing, you see versions are hardcoded, and taken from the versions file here, unless the user override with his own config.

Your code works, but it seems it is not what the developer intended originally. Probably as a mean to avoid remote breaking changes.

@s1n7ax

Hello,

The jdtls 1.46.1 is now available thanks to @s1n7ax (nvim-java/release-jdtls#3).

A temporary solution is to specify the jdtls version:

-- nvim/lua/plugins/nvim-java.lua
return {
    "nvim-java/nvim-java",
    lazy = false,
    config = function()
        require("java").setup({
            jdtls = {
                version = "v1.46.1",
            },
        })
    end,
}

It will download directly the 1.46.1 (bypassing the wrong 1.43.0 url).

But I cannot have the lombok support. The annotation @Data is not autocompleted and all the boilerplate methods are not recognized.
Even if it is installed in the Mason menu, when I open a .java file, the LSP jdtls says:

E The import lombok cannot be resolved Java (268435846) [3, 8]
E Data cannot be resolved to a type Java (16777218) [10, 5]

PS:
When I open a .java file, I have these warnings concerning the dap:

dap configuration failed                                                                                                                           
RPC[Error] code_name = MethodNotFound, message = "No delegateCommandHandler for vscode.java.resolveMainClass"                                      
stack traceback:                                                                                                                                   
        ...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:18: in function 'error_handler'                                                
        ...e/nvim/lazy/nvim-java-core/lua/java-core/utils/async.lua:32: in function 'callback'                                                     
        ...nvim-java-core/lua/java-core/ls/clients/jdtls-client.lua:74: in function 'handler'                                                      
        /usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''                                                                         
        vim/_editor.lua: in function <vim/_editor.lua:0>                                                                                           
Press ENTER or type command to continue                                                                                                            
Error executing vim.schedule lua callback: ...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:28:                                         
dap configuration failed                                                                                                                           
RPC[Error] code_name = MethodNotFound, message = "No delegateCommandHandler for vscode.java.resolveMainClass"                                      
stack traceback:                                                                                                                                   
        ...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:18: in function 'error_handler'                                                
        ...e/nvim/lazy/nvim-java-core/lua/java-core/utils/async.lua:32: in function 'callback'                                                     
        ...nvim-java-core/lua/java-core/ls/clients/jdtls-client.lua:74: in function 'handler'                                                      
        /usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''                                                                         
        vim/_editor.lua: in function <vim/_editor.lua:0>                                                                                           
stack traceback:                                                                                                                                   
        [C]: in function 'error'                                                                                                                   
        ...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:28: in function 'error_handler'                                                
        ...e/nvim/lazy/nvim-java-core/lua/java-core/utils/async.lua:32: in function 'callback'                                                     
        ...nvim-java-core/lua/java-core/ls/clients/jdtls-client.lua:74: in function 'handler'                                                      
        /usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''                                                                         
        vim/_editor.lua: in function <vim/_editor.lua:0>                                                                                           
Press ENTER or type command to continue

All of these errors are due to the recent migration to Mason 2.0.0.

@Zeioth

@Zeioth You're right. This was just a temporary fix, but now your PR has been merged into the main branch. Thanks for your suggestions and contributions.

i am using lazyvim and can't upgrade mason to 2.0 yet, so I set nvim-java to the latest version before the commit, howver i get this weird bug when I do lsp hover for a symbol i get "no information avaliable" message, even though it returns information. Anyone had this issue?

@uuuulopta

@uuuulopta you are likely missing mason-lspconfig.nvim v2

@Zeioth

@Zeioth There is still an unresolved issue in nvim-java/core: it is not yet compatible with Mason v2.0.0.

When will this bug be fixed?

KR

mason-org/mason.nvim#1944

@Morph01

@Morph01

PS: When I open a .java file, I have these warnings concerning the dap:

dap configuration failed
RPC[Error] code_name = MethodNotFound, message = "No delegateCommandHandler for vscode.java.resolveMainClass"
stack traceback:
...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:18: in function 'error_handler'
...e/nvim/lazy/nvim-java-core/lua/java-core/utils/async.lua:32: in function 'callback'
...nvim-java-core/lua/java-core/ls/clients/jdtls-client.lua:74: in function 'handler'
/usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''
vim/_editor.lua: in function <vim/_editor.lua:0>
Press ENTER or type command to continue
Error executing vim.schedule lua callback: ...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:28:
dap configuration failed
RPC[Error] code_name = MethodNotFound, message = "No delegateCommandHandler for vscode.java.resolveMainClass"
stack traceback:
...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:18: in function 'error_handler'
...e/nvim/lazy/nvim-java-core/lua/java-core/utils/async.lua:32: in function 'callback'
...nvim-java-core/lua/java-core/ls/clients/jdtls-client.lua:74: in function 'handler'
/usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''
vim/_editor.lua: in function <vim/_editor.lua:0>
stack traceback:
[C]: in function 'error'
...al/share/nvim/lazy/nvim-java/lua/java/handlers/error.lua:28: in function 'error_handler'
...e/nvim/lazy/nvim-java-core/lua/java-core/utils/async.lua:32: in function 'callback'
...nvim-java-core/lua/java-core/ls/clients/jdtls-client.lua:74: in function 'handler'
/usr/share/nvim/runtime/lua/vim/lsp/client.lua:682: in function ''
vim/_editor.lua: in function <vim/_editor.lua:0>
Press ENTER or type command to continue

All of these errors are due to the recent migration to Mason 2.0.0.

Is #293 related to this at all?

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yamafaktory commented on May 7, 2025

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Failed to run `config` for nvim-java error #374