griffenliu commented on issue #2006:
URL: https://github.com/apache/apisix/issues/2006#issuecomment-690836227
I have the same problem, see #2194.
> ### Issue description
> when route not found and `return core.response.exit(404, {error_msg =
"failed to match any routes"})`, the apisix occur error.
>
> ### Environment
> * apisix version (cmd: `apisix version`): 1.5
> * OS: Ubuntu 18.04
>
> ### Minimal test code / Steps to reproduce the issue
> 1. add global plugin cors
>
> ```
> curl -X PUT \
> https://{apisix_listen_address}/apisix/admin/global_rules/1 \
> -H 'Content-Type: application/json' \
> -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' \
> -d '{
> "plugins": {
> "cors": { }
> }
> }'
> ```
>
> 1. Access a nonexistent Route, for example: http://172.0.0.1:9080/test
> 2. the apisix source code snippet
>
> ```
> -- ### init.lua
> function _M.http_access_phase()
> .....
> -- load and run global rule
> if router.global_rules and router.global_rules.values
> and #router.global_rules.values > 0 then
> local plugins = core.tablepool.fetch("plugins", 32, 0)
> local values = router.global_rules.values
> for _, global_rule in config_util.iterate_values(values) do
> api_ctx.conf_type = "global_rule"
> api_ctx.conf_version = global_rule.modifiedIndex
> api_ctx.conf_id = global_rule.value.id
> core.table.clear(plugins)
> api_ctx.plugins = plugin.filter(global_rule, plugins)
> run_plugin("rewrite", plugins, api_ctx)
> run_plugin("access", plugins, api_ctx)
> end
>
> core.tablepool.release("plugins", plugins)
> **-- Note: api_ctx is cleared here
> api_ctx.plugins = nil
> api_ctx.conf_type = nil
> api_ctx.conf_version = nil
> api_ctx.conf_id = nil**
>
> api_ctx.global_rules = router.global_rules
> end
> .....
> -- Note: here no route matched, so exit 404
> local route = api_ctx.matched_route
> if not route then
> return core.response.exit(404,
> {error_msg = "failed to match any routes"})
> end
> ...
> end
> -- Continue with the following code
> function _M.http_header_filter_phase()
> common_phase("header_filter")
> end
> local function common_phase(phase_name)
> ...
> if api_ctx.global_rules then
> local plugins = core.tablepool.fetch("plugins", 32, 0)
> local values = api_ctx.global_rules.values
> for _, global_rule in config_util.iterate_values(values) do
> core.table.clear(plugins)
> plugins = plugin.filter(global_rule, plugins)
> -- Note: here run global plugin
> run_plugin(phase_name, plugins, api_ctx)
> end
> core.tablepool.release("plugins", plugins)
> end
> ...
> end
>
> local function run_plugin(phase, plugins, api_ctx)
> .....
> for i = 1, #plugins, 2 do
> local phase_fun = plugins[i][phase]
> if phase_fun then
> phase_fun(plugins[i + 1], api_ctx)
> end
> end
> .....
> end
> -- ### cors.lua
> function _M.header_filter(conf, ctx)
> .....
> -- Note: here the ctx is api_ctx
> local multiple_origin, err = core.lrucache.plugin_ctx(plugin_name, ctx,
>
create_mutiple_origin_cache, conf)
> .....
> end
>
> -- ### lrucache.lua
> function _M.plugin_ctx(plugin_name, api_ctx, create_obj_fun, ...)
> -- Note: here used api_ctx.conf_id is nil
> local key = api_ctx.conf_type .. "#" .. api_ctx.conf_id
> return _plugin(plugin_name, key, api_ctx.conf_version, create_obj_fun,
...)
> end
> ```
>
> ### What's the actual result? (including assertion message & call stack if
applicable)
> 2020/09/09 11:37:14 [error] 9701#9701: _373 failed to run
header_filter_by_lua_:
...user-center//deps/share/lua/5.1/apisix/core/lrucache.lua:202: attempt to
concaten ate field 'conf_id' (a nil value)
> 2297217 stack traceback:
> 2297218 ...user-center//deps/share/lua/5.1/apisix/core/lrucache.lua:202:
in function 'plugin_ctx'
> 2297219 ...-user-center//deps/share/lua/5.1/apisix/plugins/cors.lua:144:
in function 'phase_fun'
> 2297220 ...odes/dfy-user-center//deps/share/lua/5.1/apisix/init.lua:142:
in function 'run_plugin'
> 2297221 ...odes/dfy-user-center//deps/share/lua/5.1/apisix/init.lua:562:
in function 'common_phase'
> 2297222 ...odes/dfy-user-center//deps/share/lua/5.1/apisix/init.lua:573:
in function 'http_header_filter_phase'
> 2297223 header_filter_by_lua:2: in main chunk, client: 172.30.212.206,
server: , request: "GET /dfy-h5-user HTTP/1.0", host: "m.dafangya.com.cn"
>
> ### What's the expected result?
> 404 page.
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