url request missing parameters when using serverless-pre-function plugin

[engimatic]

Description

插件代码
return function(conf, ctx) local core = require("apisix.core");local http = require("resty.http");local httpc = http.new(); local cjson = require "cjson";local cjson2 = cjson.new();local authorization = core.request.header(ctx, "Authorization"); local uri = ctx.var.uri;if(authorization == nil) then ngx.log(ngx.ERR, "match uri ", uri);core.response.exit(401);return; end;local url = "http://ip:port/checkToken";local req = {};req.uri = uri;req.token = authorization; local res,err = httpc:request_uri(url, {method = "POST", body = cjson2.encode(req), headers = { ["Content-Type"] = "application/json" }});if not res then core.response.exit(500);return;end;local result = cjson2.decode(res.body); if not(result["data"]) then ngx.log(ngx.ERR, "RESULT ", res.body);core.response.exit(res.status, res.body);return;end;end

调用接口/v1/sys/group/userLike?name=aa，连续多次请求，后端发现部分请求url没有name参数，name参数被截断。禁用插件后，没有问题

Environment

• APISIX version :2.15.0
• Operating system :k8s

[tokers]

@engimatic Is this your code? Try to troubleshoot it.

[engimatic]

@engimatic Is this your code? Try to troubleshoot it.

@tokers

这是我的erverless-pre-function插件代码。 /v1/sys/group/userLike?name=aa。每100次请求，可能出现4-5个参数被截断的问题。post请求json格式的request，都没有出现过问题

[engimatic]

@tokers 这个是我们做鉴权的自定义插件，目前插件代码运行没有任何问题

[tzssangglass]

调用接口/v1/sys/group/userLike?name=aa，连续多次请求，后端发现部分请求url没有name参数，name参数被截断。禁用插件后，没有问题

can you describe this problem clearly?

[engimatic]

In fact, I tried 3*1000 times without exception.

I have tried again many times.When my backend service deploy in k8s, it happend again.When my backend service deploy in virtual machine，there is no errors.So it's maybe caused by k8s network, I think.But I cannot find what wrong with it.

`
web-> k8s LB -> k8s apisix -> k8s backend, error appear sometimes;

web-> k8s LB -> k8s apisix -> virtual machine backend, no errors.
`

[tzssangglass]

I have tried again many times.When my backend service deploy in k8s, it happend again.When my backend service deploy in virtual machine，there is no errors.So it's maybe caused by k8s network, I think.But I cannot find what wrong with it.

As bizarre as it sounds, I haven't had a similar problem. But from experience, it could be that there is a configuration error somewhere, replacing the original path that contain uri args with the request path

[engimatic]

I have tried again many times.When my backend service deploy in k8s, it happend again.When my backend service deploy in virtual machine，there is no errors.So it's maybe caused by k8s network, I think.But I cannot find what wrong with it.

As bizarre as it sounds, I haven't had a similar problem. But from experience, it could be that there is a configuration error somewhere, replacing the original path that contain uri args with the request path

But it not happend everytime,just a certain probability occur.

[engimatic]

I have tried again many times.When my backend service deploy in k8s, it happend again.When my backend service deploy in virtual machine，there is no errors.So it's maybe caused by k8s network, I think.But I cannot find what wrong with it.

As bizarre as it sounds, I haven't had a similar problem. But from experience, it could be that there is a configuration error somewhere, replacing the original path that contain uri args with the request path

I have test another case:
K8S LB -> K8S APISIX -> K8S SERVICE error appear sometimes;
K8S LB -> K8S APISIX -> K8S SERVICE,no plugin; no errors;
K8S LB -> K8S APISIX -> virtual machine SERVICE no errors;
K8S LB -> K8S SERVICE no errors;

I was utterly confused.

[engimatic]

I have just find something wrong with tomcat and i had test more and more,find that in other case, there are errors with small probability.I think i have reloved this problem.
THANKS !