Try adding the `$host` variable in log_format:

    log_format main &#39;$http_x_forwarded_for - $remote_user [$time_local] &quot;$host&quot; &quot;$request&quot; &#39;
                &#39;$status $body_bytes_sent &quot;$http_referer&quot; &#39;
                &#39;&quot;$http_user_agent&quot; $request_time&#39;;

http://wiki.nginx.org/HttpCoreModule#.24host:

&gt; $host
&gt; 
&gt; This variable is equal to line Host in the header of request or name
&gt; of the server processing the request if the Host header is not
&gt; available.
&gt; 
&gt; This variable may have a different value from $http_host in such
&gt; cases: 1) when the Host input header is absent or has an empty value,
&gt; $host equals to the value of server_name directive; 2) when the value
&gt; of Host contains port number, $host doesn&#39;t include that port number.
&gt; $host&#39;s value is always lowercase since 0.8.17.

If you want to log the full requested url, then my method is

    log_format main &#39;$http_x_forwarded_for - $remote_user [$time_local] &#39;
    &#39;&quot;$request_method $scheme://$host$request_uri $server_protocol&quot; &#39;
    &#39;$status $body_bytes_sent &quot;$http_referer&quot; &#39;
    &#39;&quot;$http_user_agent&quot; $request_time&#39;;

So splitting the $request into its constituent parts and popping $host in the middle.   Also lets you see if the request is http or https.



I just finished reading this post: https://stackoverflow.com/questions/9276807/whats-the-advantage-of-a-java-5-threadpoolexecutor-over-a-java-7-forkjoinpool and felt that the answer is not straight enough.

Can you explain in simple language and examples, what are the **trade-offs** between Java 7&#39;s Fork-Join framework and the older solutions?

I also read the Google&#39;s #1 hit on the topic [Java Tip: When to use ForkJoinPool vs ExecutorService][1] from [javaworld.com][2] but the article doesn&#39;t answer the title question **when**, it talks about api differences mostly ...


  [1]: http://www.javaworld.com/article/2078440/enterprise-java/java-tip-when-to-use-forkjoinpool-vs-executorservice.html

  [2]: https://www.javaworld.com/

Java&#39;s Fork/Join vs ExecutorService - when to use which?

I have an object hierarchy that increases in complexity as the inheritance tree deepens. None of these are abstract, hence, all of their instances serve a, more or less sophisticated, purpose.

As the number of parameters is quite high, I would want to use the Builder Pattern to set properties rather than code several constructors. As I need to cater to all permutations, leaf classes in my inheritance tree would have telescoping constructors.

I have browsed for an answer here when I hit some problems during my design. First of, let me give you a simple, shallow example to illustrate the problem.

    public class Rabbit
    {
        public String sex;
        public String name;

        public Rabbit(Builder builder)
        {
            sex = builder.sex;
            name = builder.name;
        }

        public static class Builder
        {
            protected String sex;
            protected String name;

            public Builder() { }

            public Builder sex(String sex)
            {
                this.sex = sex;
                return this;
            }

            public Builder name(String name)
            {
                this.name = name;
                return this;
            }

            public Rabbit build()
            {
                return new Rabbit(this);
            }
        }
    }

    public class Lop extends Rabbit
    {
        public float earLength;
        public String furColour;
        
        public Lop(LopBuilder builder)
        {
            super(builder);
            this.earLength = builder.earLength;
            this.furColour = builder.furColour;
        }

        public static class LopBuilder extends Rabbit.Builder
        {
            protected float earLength;
            protected String furColour;

            public LopBuilder() { }

            public Builder earLength(float length)
            {
                this.earLength = length;
                return this;
            }

            public Builder furColour(String colour)
            {
                this.furColour = colour;
                return this;
            }

            public Lop build()
            {
                return new Lop(this);
            }
        }
    }

Now that we have some code to go on, imaging I want to build a `Lop`:

    Lop lop = new Lop.LopBuilder().furColour(&quot;Gray&quot;).name(&quot;Rabbit&quot;).earLength(4.6f);
This call will not compile as the last chained call cannot be resolved, `Builder` not defining the method `earLength`. So this way requires that all calls be chained in a specific order which is very impractical, especially with a deep hierarchy tree.

Now, during my search for an answer, I came across https://stackoverflow.com/questions/17164375/subclassing-a-java-builder-class which suggests using the [Curiously Recursive Generic Pattern][1]. However, as my hierarchy does not contain an abstract class, this solution will not work for me. But the approach relies on abstraction and polymorphism to function which is why I don&#39;t believe I can adapt it to my needs.

An approach I have currently settled with is to override all methods of the superclass `Builder` in the hierarchy and simply do the following:

    public ConcreteBuilder someOverridenMethod(Object someParameter)
    {
        super(someParameter);
        return this;
    }

With this approach I can assure I am being returned an instance I can issue chain calls on. While this is not as worse as the Telescoping Anti-pattern, it is a close second and I consider it a bit &quot;hacky&quot;.

Is there another solution to my problem that I am not aware of? Preferably a solution consistent with the design pattern. Thank you!


  [1]: http://www.artima.com/weblogs/viewpost.jsp?thread=133275

Builder Pattern and Inheritance

We use following nginx site configure file in our production env.

    log_format main &#39;$http_x_forwarded_for - $remote_user [$time_local] &quot;$request&quot; &#39;
                    &#39;$status $body_bytes_sent &quot;$http_referer&quot; &#39;
                    &#39;&quot;$http_user_agent&quot; $request_time&#39;;



    server {
            root /srv/www/web;
            server_name *.test.com;
            access_log /var/log/nginx/xxx.test.com.access.log main;

Both &quot;http://a.test.com/ping&quot; and &quot;http://b.test.com/ping&quot; http request will be record in file xxx.test.com.access.log.

But there is a problem, nginx don&#39;t store &quot;domain name&quot; in xxx.test.com.access.log.

&quot;http://a.test.com/ping&quot; and &quot;http://b.test.com/ping&quot; share the same request &quot;Get /ping&quot;.

How can I record &quot;a.test.com&quot; or &quot;b.test.com&quot; in nginx log?

Full record url in nginx log

We use following nginx site configure file in our production env.
<pre><code class="hljs language-swift">log_format main '$http_x_forwarded_for - $remote_user [$time_local] "$request" '
 '$status $body_bytes_sent "$http_referer" '
 '"$http_user_agent" $request_time';



server {
 root /srv/www/web;
 server_name *.test.com;
 access_log /var/log/nginx/xxx.test.com.access.log main;
</code></pre>
Both "<a href="http://a.test.com/ping" target="_blank" rel="noopener noreferrer">http://a.test.com/ping</a>" and "<a href="http://b.test.com/ping" target="_blank" rel="noopener noreferrer">http://b.test.com/ping</a>" http request will be record in file xxx.test.com.access.log.
But there is a problem, nginx don't store "domain name" in xxx.test.com.access.log.
"<a href="http://a.test.com/ping" target="_blank" rel="noopener noreferrer">http://a.test.com/ping</a>" and "<a href="http://b.test.com/ping" target="_blank" rel="noopener noreferrer">http://b.test.com/ping</a>" share the same request "Get /ping".
How can I record "a.test.com" or "b.test.com" in nginx log?

I was looking at using HAProxy and Nginx for load balancing, and I had some questions:

- Should I use JUST HAProxy over Nginx for the proxy server?
- Is there any reason to have HAProxy and Nginx installed on the same proxy server?

Thanks

HAProxy vs. Nginx

I am trying to modify the Nginx config file to remove a &quot;rewrite&quot;.

Currently, I have this config file:

    worker_processes  1;

    events {
        worker_connections  1024;
    }

    http {
        include       mime.types;
        default_type  application/octet-stream;
        sendfile        on;
        keepalive_timeout  65;
    	server {
    		listen      80;
    		server_name amc.local;
    		return 301 https://$host:8443/index.html;
    	}
    }

Now I want to reload this config file, I tried

    nginx -s reload
    nginx -c &lt;conf file&gt;
    nginx -s stop/start


In the log file, there is the line

    2014/01/22 11:25:25 [notice] 1310#0: signal process started

but the modifications are not loaded.


Reload Nginx configuration

Trying to deploy my first portal .

 I am getting 502 gateway timeout error in browser when i was sending the request through browser  

when i checked the logs , i got this error

     2014/02/03 09:00:32 [error] 16607#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 14.159.131.19, server: foo.com, request: &quot;GET HTTP/1.1&quot;, upstream: &quot;fastcgi://127.0.0.1:9000&quot;, host: &quot;22.11.180.154&quot;


is there any problem related to permissions

nginx: connect() failed (111: Connection refused) while connecting to upstream

I am getting this error in my `nginx-error.log` file:

    2014/02/17 03:42:20 [crit] 5455#0: *1 connect() to unix:/tmp/uwsgi.sock failed (13: Permission denied) while connecting to upstream, client: xx.xx.x.xxx, server: localhost, request: &quot;GET /users HTTP/1.1&quot;, upstream: &quot;uwsgi://unix:/tmp/uwsgi.sock:&quot;, host: &quot;EC2.amazonaws.com&quot;

The browser also shows a 502 Bad Gateway Error. The output of a `curl` is the same, Bad Gateway html

I&#39;ve tried to fix it by changing permissions for `/tmp/uwsgi.sock` to 777. That didn&#39;t work. I also added myself to the `www-data` group (a couple questions that looked similar suggested that). Also, no dice. 

Here is my `nginx.conf` file:

**nginx.conf**

    worker_processes 1;
    worker_rlimit_nofile 8192;

    events {
      worker_connections  3000; 
    }

    error_log  /var/log/nginx/error.log warn;
    pid        /var/run/nginx.pid;

    http {
        include       /etc/nginx/mime.types;
        default_type  application/octet-stream;

        log_format  main  &#39;$remote_addr - $remote_user [$time_local] &quot;$request&quot; &#39;
                      &#39;$status $body_bytes_sent &quot;$http_referer&quot; &#39;
                      &#39;&quot;$http_user_agent&quot; &quot;$http_x_forwarded_for&quot;&#39;;

        access_log  /var/log/nginx/access.log  main;

        sendfile        on; 
        #tcp_nopush     on; 

        keepalive_timeout  65; 

        #gzip  on; 

        include /etc/nginx/conf.d/*.conf;
        include /etc/nginx/sites-enabled/*;
    }


I am running a Flask application with Nginsx and Uwsgi, just to be thorough in my explanation. If anyone has any ideas, I would really appreciate them.

------------
**EDIT**

I have been asked to provide my uwsgi config file. So, I never personally wrote my nginx or my uwsgi file. I followed the guide [here][1] which sets everything up using ansible-playbook. The `nginx.conf` file was generated automatically, but there was nothing in `/etc/uwsgi` except a `README` file in both `apps-enabled` and `apps-available` folders. Do I need to create my own config file for uwsgi? I was under the impression that ansible took care of all of those things. 

I believe that `ansible-playbook` figured out my uwsgi configuration since when I run this command

    uwsgi -s /tmp/uwsgi.sock -w my_app:app

it starts up and outputs this:

    *** Starting uWSGI 2.0.1 (64bit) on [Mon Feb 17 20:03:08 2014] ***
    compiled with version: 4.7.3 on 10 February 2014 18:26:16
    os: Linux-3.11.0-15-generic #25-Ubuntu SMP Thu Jan 30 17:22:01 UTC 2014
    nodename: ip-10-9-xxx-xxx
    machine: x86_64
    clock source: unix
    detected number of CPU cores: 1
    current working directory: /home/username/Project
    detected binary path: /usr/local/bin/uwsgi
    !!! no internal routing support, rebuild with pcre support !!!
    *** WARNING: you are running uWSGI without its master process manager ***
    your processes number limit is 4548
    your memory page size is 4096 bytes
    detected max file descriptor number: 1024
    lock engine: pthread robust mutexes
    thunder lock: disabled (you can enable it with --thunder-lock)
    uwsgi socket 0 bound to UNIX address /tmp/uwsgi.sock fd 3
    Python version: 2.7.5+ (default, Sep 19 2013, 13:52:09)  [GCC 4.8.1]
    *** Python threads support is disabled. You can enable it with --enable-threads ***
    Python main interpreter initialized at 0x1f60260
    your server socket listen backlog is limited to 100 connections
    your mercy for graceful operations on workers is 60 seconds
    mapped 72760 bytes (71 KB) for 1 cores
    *** Operational MODE: single process ***
    WSGI app 0 (mountpoint=&#39;&#39;) ready in 3 seconds on interpreter 0x1f60260 pid: 26790 (default app)
    *** uWSGI is running in multiple interpreter mode ***
    spawned uWSGI worker 1 (and the only) (pid: 26790, cores: 1)


  [1]: http://mattupstate.com/python/devops/2012/08/07/flask-wsgi-application-deployment-with-ubuntu-ansible-nginx-supervisor-and-uwsgi.html

Nginx error: (13: Permission denied) while connecting to upstream

I have the following scenario: I have an env variable `$SOME_IP` defined and want to use it in a nginx block. Referring to the [nginx documentation](http://wiki.nginx.org/CoreModule) I use the `env` directive in the `nginx.conf` file like the following:

    user www-data;
    worker_processes 4;
    pid /run/nginx.pid;

    env SOME_IP;

Now I want to use the variable for a `proxy_pass`. I tried it like the following:

    location / {
        proxy_pass http://$SOME_IP:8000;
    }


But I end up with this error message: `nginx: [emerg] unknown &quot;some_ip&quot; variable`

Content Type	Original Author	Original Content on Stackoverflow
Question	user1859451	View Question on Stackoverflow
Solution 1 - Nginx	Tan Hong Tat	View Answer on Stackoverflow
Solution 2 - Nginx	Tim Bray	View Answer on Stackoverflow

Full record url in nginx log

Nginx Problem Overview

Nginx Solutions

Solution 1 - Nginx

Solution 2 - Nginx

Builder Pattern and Inheritance

Java's Fork/Join vs ExecutorService - when to use which?

Attributions