无法在Jupyter Lab及VS Code中运行Julia 1.7.3内核

问题现象 #

• Jupyter Lab运行单元格时报错，核心错误为Package Parsers does not have SnoopPrecompile in its dependencies，导致IJulia预编译失败
• VS Code中运行无任何反应，无报错输出

报错详情 #

in expression starting at /home/rohit/.julia/packages/IJulia/AQu2H/src/kernel.jl:1
[I 2022-11-15 10:54:57.314 ServerApp] AsyncIOLoopKernelRestarter: restarting kernel (1/5), new random ports
[ Info: Precompiling IJulia [7073ff75-c697-5162-941a-fcdaad2a7d2a]
ERROR: LoadError: ArgumentError: Package Parsers does not have SnoopPrecompile in its dependencies:
- If you have Parsers checked out for development and have
  added SnoopPrecompile as a dependency but haven't updated your primary
  environment's manifest file, try `Pkg.resolve()`.
- Otherwise you may need to report an issue with Parsers
Stacktrace:
  [1] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:980
  [2] include(mod::Module, _path::String)
    @ Base ./Base.jl:418
  [3] include(x::String)
    @ Parsers ~/.julia/packages/Parsers/bEa0b/src/Parsers.jl:1
  [4] top-level scope
    @ ~/.julia/packages/Parsers/bEa0b/src/Parsers.jl:393
  [5] include
    @ ./Base.jl:418 [inlined]
  [6] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::String)
    @ Base ./loading.jl:1318
  [7] top-level scope
    @ none:1
  [8] eval
    @ ./boot.jl:373 [inlined]
  [9] eval(x::Expr)
    @ Base.MainInclude ./client.jl:453
 [10] top-level scope
    @ none:1
in expression starting at /home/rohit/.julia/packages/Parsers/bEa0b/src/precompile.jl:1
in expression starting at /home/rohit/.julia/packages/Parsers/bEa0b/src/Parsers.jl:1
ERROR: LoadError: Failed to precompile Parsers [69de0a69-1ddd-5017-9359-2bf0b02dc9f0] to /home/rohit/.julia/compiled/v1.7/Parsers/jl_7qWIcC.
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:33
  [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, ignore_loaded_modules::Bool)
    @ Base ./loading.jl:1466
  [3] compilecache(pkg::Base.PkgId, path::String)
    @ Base ./loading.jl:1410
  [4] _require(pkg::Base.PkgId)
    @ Base ./loading.jl:1120
  [5] require(uuidkey::Base.PkgId)
    @ Base ./loading.jl:1013
  [6] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:997
  [7] include(mod::Module, _path::String)
    @ Base ./Base.jl:418
  [8] include(x::String)
    @ JSON ~/.julia/packages/JSON/NeJ9k/src/JSON.jl:3
  [9] top-level scope
    @ ~/.julia/packages/JSON/NeJ9k/src/JSON.jl:11
 [10] include
    @ ./Base.jl:418 [inlined]
 [11] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::String)
    @ Base ./loading.jl:1318
 [12] top-level scope
    @ none:1
 [13] eval
    @ ./boot.jl:373 [inlined]
 [14] eval(x::Expr)
    @ Base.MainInclude ./client.jl:453
 [15] top-level scope
    @ none:1
in expression starting at /home/rohit/.julia/packages/JSON/NeJ9k/src/Parser.jl:1
in expression starting at /home/rohit/.julia/packages/JSON/NeJ9k/src/JSON.jl:3
ERROR: LoadError: Failed to precompile JSON [682c06a0-de6a-54ab-a142-c8b1cf79cde6] to /home/rohit/.julia/compiled/v1.7/JSON/jl_CxGVlg.
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:33
  [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, ignore_loaded_modules::Bool)
    @ Base ./loading.jl:1466
  [3] compilecache(pkg::Base.PkgId, path::String)
    @ Base ./loading.jl:1410
  [4] _require(pkg::Base.PkgId)
    @ Base ./loading.jl:1120
  [5] require(uuidkey::Base.PkgId)
    @ Base ./loading.jl:1013
  [6] require(into::Module, mod::Symbol)
    @ Base ./loading.jl:997
  [7] include
    @ ./Base.jl:418 [inlined]
  [8] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::String)
    @ Base ./loading.jl:1318
  [9] top-level scope
    @ none:1
 [10] eval
    @ ./boot.jl:373 [inlined]
 [11] eval(x::Expr)
    @ Base.MainInclude ./client.jl:453
 [12] top-level scope
    @ none:1
in expression starting at /home/rohit/.julia/packages/IJulia/AQu2H/src/IJulia.jl:1
ERROR: LoadError: Failed to precompile IJulia [7073ff75-c697-5162-941a-fcdaad2a7d2a] to /home/rohit/.julia/compiled/v1.7/IJulia/jl_f8oPcc.
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:33
 [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::IO, internal_stdout::IO, ignore_loaded_modules::Bool)
   @ Base ./loading.jl:1466
 [3] compilecache(pkg::Base.PkgId, path::String)
   @ Base ./loading.jl:1410
 [4] _require(pkg::Base.PkgId)
   @ Base ./loading.jl:1120
 [5] require(uuidkey::Base.PkgId)
   @ Base ./loading.jl:1013
 [6] require(into::Module, mod::Symbol)

问题原因 #

Julia 1.7.3版本不内置SnoopPrecompile包，而当前安装的Parsers包新版本引入了该依赖，导致预编译失败，进而引发IJulia加载错误。VS Code无反应是因为内核启动失败，没有输出日志。

解决方案 #

方案1：降级Parsers到兼容版本（推荐，保留Julia 1.7.3） #

1. 打开Julia REPL，按]进入包管理模式
2. 执行以下命令：

   add Parsers@2.5.0
   resolve
   precompile
   build IJulia
   

3. 退出包管理模式（按Backspace），重启Jupyter Lab和VS Code

方案2：升级Julia到1.8及以上版本 #

1. 下载并安装Julia 1.8+版本（该版本内置SnoopPrecompile）
2. 重新安装IJulia：打开新Julia REPL，进入包管理模式执行add IJulia，再执行build IJulia
3. 在Jupyter Lab和VS Code中切换到新的Julia内核

VS Code额外处理 #

如果执行上述方案后VS Code仍无反应：

• 打开命令面板（Ctrl+Shift+P），执行Julia: Restart Kernel
• 检查VS Code的Julia插件版本，若插件过新，可降级到兼容Julia 1.7的旧版本

内容的提问来源于stack exchange，提问作者rohit deraj