skynet问题

[TOC]

lua模块引用时找不到文件

问题

新写了一个lua模块，其调用语句如下：

local xxx = require "xxx"

用skynet调用时报以下错误：

 lua loader error : ./lualib/skynet/require.lua:31: module 'xxx' not found:
        no field package.preload['xxx']
        no file './lualib/xxx.lua'
        no file './lualib/xxx/init.lua'
        no file './luaclib/xxx.so'
stack traceback:
        [C]: in upvalue 'require'
        ./lualib/skynet/require.lua:31: in function 'skynet.require.require'
        ./examples/hotpatch.lua:4: in local 'main'
        ./lualib/loader.lua:50: in main chunk

原因

lua没有找到文件，require "xxx"这里报错

解决

修改调用语句：

package.path = "./examples/?.lua;" .. package.path -- 指定目录
local hot = require "hot"

热更新时print函数无法打印

问题

测试热更新机制时，print函数失效

原因

热更新时skynet屏蔽了print函数，导致print无法打印

解决

将print(xxx)函数修改为_G.print(xxx)

调用snax.exit()报错

问题

local skynet = require "skynet"
local snax = require "skynet.snax"

skynet.start(function ()
    local s = snax.newservice("snhello", "hello")
    if not s then
        print("create snax server fail")
        return
    end
    snax.exit()
end)

当执行到snax.exit退出时，报错如下：

[:00000008] init service failed: ./lualib/snax/interface.lua:82: ./examples/main_snax.lua:4: attempt to index a nil value (local 'skynet')
stack traceback:
        ...

原因

snax.exit退出的是自己的服务，不是snhello服务

解决

将snax.exit()修改为snax.kill(s)

使用第三方库pbc时，报`module 'protobuf.c' not found`错误

问题

lua: ./protobuf.lua:1: module 'protobuf.c' not found:
        no field package.preload['protobuf.c']
        no file '/usr/local/share/lua/5.3/protobuf/c.lua'
        no file '/usr/local/share/lua/5.3/protobuf/c/init.lua'
        no file '/usr/local/lib/lua/5.3/protobuf/c.lua'
        no file '/usr/local/lib/lua/5.3/protobuf/c/init.lua'
        no file './protobuf/c.lua'
        no file './protobuf/c/init.lua'
        no file '/usr/local/lib/lua/5.3/protobuf/c.so'
        no file '/usr/local/lib/lua/5.3/loadall.so'
        no file './protobuf/c.so'
        no file '/usr/local/lib/lua/5.3/protobuf.so'
        no file '/usr/local/lib/lua/5.3/loadall.so'
        no file './protobuf.so'
stack traceback:
        [C]: in function 'require'
        ./protobuf.lua:1: in main chunk
        [C]: in function 'require'
        PB_001A_TEST.lua:1: in main chunk
        [C]: in ?

原因

skynet的lua版本与pbc的lua版本不一致，skynet当前(20211011)的版本为v5.4.3，需要编译安装最新的lua版本；

解决

下载安装最新版lua

到lua官网下载最新版lua代码

wget https://www.lua.org/ftp/lua-5.4.3.tar.gz

解压文件
```
tar -zxvf lua-5.4.3.tar.gz
```
编译安装
```
cd lua-5.4.3.tar.gz
make
make install
```

FilesExpand file tree

skynet_zh.md

Latest commit

History