NGX_AGAIN Handling

[rambabuwhy]

HI
I am facing an issue with NGX_AGAIN.
ngx upload module is returning NGX_AGAIN while uploading a file. when nginx calls again upload module but upload module returns NGX_OK if requestbody exist
if( r->requestbody) return NGX_OK and its continue in a loop.

any solution to this?

    if (!c->read->ready) {
        clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
        ngx_add_timer(c->read, clcf->client_body_timeout);

        if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
            return NGX_HTTP_INTERNAL_SERVER_ERROR;
        }

        return NGX_AGAIN;
    }

Thanks
Ram

[fdintino]

I don't understand what the issue is here... In the code you cited it is not a bug for NGX_AGAIN to be returned there. If the socket is not ready for reading then it returns NGX_AGAIN. Then, whenever the connection does start receiving data it will call the function again. If c->read->ready is always false, that suggests that the issue lies somewhere else, either with the client, the server configuration, or with another nginx module.

[rambabuwhy]

Hi, it resolved after increasing client body buffer size.
Thanks