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  • nginx + Jetty - thousands of connections stuck in LAST_ACK

    - by virulence
    I have a FreeBSD machine with jails -- two in particular, one that runs nginx and another that runs a Java program that accepts requests via Jetty (embedded mode) Jetty receives upwards of 500 requests/sec constantly and there has been an issue lately where I will constantly have over 60,000 connections in the LAST_ACK state between nginx and jetty. Distribution of all connections (includes some other services, particularly php-fpm) root@host:/root # netstat -an > conns.txt root@host:/root # cat conns.txt | awk '{print $6}' | sort | uniq -c | sort -n 18 LISTEN 112 CLOSING 485 ESTABLISHED 650 FIN_WAIT_2 1425 FIN_WAIT_1 3301 TIME_WAIT 64215 LAST_ACK Distribution of nginx - jetty connections root@host:/root # cat conns.txt | grep '10.10.1.57' | awk '{print $6}' | sort | uniq -c | sort -n 1 3 CLOSE_WAIT 3 LISTEN 18 FIN_WAIT_2 125 ESTABLISHED 64193 LAST_ACK I'd prefer every request to fully close the connection. Clients requests are about 10 minutes apart from each other so connections must be closed. Some of the connections, tcp4 0 0 10.10.1.50.46809 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46805 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46797 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46794 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46790 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46789 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46771 10.10.1.57.9050 LAST_ACK etc.. On Jetty's end I've set maxIdleTime to 2000 -- before this all connections were in ESTABLISHED but they are now LAST_ACK On Jetty's end I've set Connection: close (i.e response.setHeader(HttpHeaders.CONNECTION, HttpHeaderValues.CLOSE);) Jetty never reports a lot of open connections -- always very few. PF/IPFW is not currently being used nginx - reset_timedout_connection is on I cannot figure out how to get nginx or jetty to forcibly close the connection, is this simply something that needs to be fixed in Jetty so that it fully closes the socket after the request finishes? Thanks a lot in advance EDIT: forgot my nginx config for the proxy setup- proxy_pass http://10.10.1.57:9050; proxy_set_header HTTP_X_GEOIP $http_x_geoip; proxy_set_header GEOIP_COUNTRY_CODE $geoip_country_code; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection ""; proxy_http_version 1.1; EDIT2: Forcing Jetty to close the connection via request.getConnection().getEndPoint().close() does nothing -- it's obvious the connection IS being closed (as it's in LAST_ACK) but why isn't it getting past this? Is Nginx keeping the connection open to the backend for some reason?

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  • What advantage does a 2400x600 dpi printer have over a 1200x1200 dpi printer?

    - by Cygon
    I've seen laser printers with a resolutions of 1200x1200 dpi and, strangely, 2400x600 dpi. As the measure is dots per inch, not Kdots on a page or something (where a higher vertical resolution might make sense because paper is rectangular, not square), I'm wondering what the uneven resolution is good for. Why print one square inch with 2400 dots vertically but only 600 horizontally? Does this look more detailed than 1200 by 1200 dots? Or is it better for textile printing or some other special case?

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  • Sharing printer form win 7 to xp in virtualbox

    - by Null
    Using virtualbox (win7 host, winXP guest) and a bluetooth printer (a portable one) I've set up printer sharing on host and can print from guest. But when the host isn't connected to the internet printing stops working. I'm using bridged adapter in virtualbox.

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  • Addons which actually make Firefox run faster?

    - by Zombies
    I would like to know of addons which actually enhance firefox's performance, both intentionally and unintentionally. I find that firefox tends to have major performance issues with certain websites. These websites tend to have a fair amount of javascript and css, and probably a large dom tree which may even be growing dynamically through javascript too. The worse offenders are those with heavy javascript, use heavy facebook integration, websites with non performant javascript, excessive javascript and websites with too many advertisements.

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  • Prevent "^C" from being printed when aborting editing current prompt

    - by blueyed
    When you're editing a prompt in bash, and then press Ctrl-C to abort it, "^C" might get printed where the cursor has been. When you were in the middle of the line, this makes copy'n'pasting more difficult and IIRC it can be configured to not display it (and overwrite parts of the command line). I do not have this problem myself (using zsh, which does not print "^C"), but ran across this in a Konsole bug report.

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  • Scan HTML for unused assets in folders

    - by Byran
    I have a aging website I'm managing and I'd like to remove all unused external files (.css, .jpg, .js, etc.) that are currently in various folders all over the site. Is there a tool out there that can help me identify and/or remove these for me?

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  • Desktop text that's always on top and loaded from file pereodically

    - by Petja
    I want to have custom text printed on my screen always on top. I tried rainmeter software and i could not find option to load text from file on my system or in any other way. What i want to have is software that prints on top of all windows and scan file every seconds to print latest changes. P.S. the idea would be to have my live PHP website error log printed on my screen every second or as new entres appear.

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  • Nginx Reverse Proxy Node.js and Wordpress + Static Files Issue

    - by joemccann
    I have had quite a time trying to get nginx to serve static assets from my wordpress blog. Have a look at the config and let me know if you can help. ( https://gist.github.com/1130332 - to see the entire thing) server { listen 80; server_name subprint.com; access_log /var/www/subprint/logs/access.log; error_log /var/www/subprint/logs/error.log; root /var/www/subprint/server/public; # express serves static resources for subprint.com out of here location / { proxy_pass http://127.0.0.1:8124; root /var/www/subprint/server; access_log on; } #serve static assets location ~* ^(?!\/).+\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$ { expires max; access_log off; } # the route for the wordpress blog # unfortunately the static assets (css, img, etc.) are not being pathed/served properly location /blog { root /var/www/localhost/public; index index.php; access_log /var/www/localhost/logs/access.log; error_log /var/www/localhost/logs/error.log; if (!-e $request_filename) { rewrite ^/(.*)$ /index.php?q=$1 last; break; } if (!-f $request_filename) { rewrite /blog$ /blog/index.php last; break; } } # actually serves the wordpress and subsequently phpmyadmin location ~* (?!\/blog).+\.php$ { fastcgi_pass localhost:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/localhost/public$fastcgi_script_name; fastcgi_param PATH_INFO $fastcgi_script_name; include /usr/local/nginx/conf/fastcgi_params; } # This works fine, but ONLY with a symlink inside the /var/www/localhost/public directory pointing to /usr/share/phpmyadmin location /phpmyadmin { index index.php; access_log /var/www/phpmyadmin/logs/access.log; error_log /var/www/phpmyadmin/logs/error.log; alias /usr/share/phpmyadmin/; if (!-f $request_filename) { rewrite /phpmyadmin$ /phpmyadmin/index.php permanent; break; } } # opt-in to the future add_header "X-UA-Compatible" "IE=Edge,chrome=1"; }

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  • Ubuntu 12.04 - compiz plugin - screenshot not catching the launcher menus

    - by gotqn
    I have enable the following plugin that allows me to make a screenshot of selected by me area: Screenshot plugin Ubuntu 12.04 Unfortunately, I am not able to make a screenshot of my launchers sub menus (after right click of icon on the launcher a menu appears). Actually, I have enable this plugin because I was not able to make a screenshot of this sub menus using the ordinary print screen button. Is there a way to fix this?

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  • How to Change Bookmarks Toolbar Height

    - by IneedHelp
    I have tried using Multirow Bookmarks Toolbar Plus and Roomy Bookmarks Toolbar Firefox add-ons, but the problem is that they are constantly stressing my CPU (even when idling). It probably has something to do with version 11 of the browser. Anyway, is there some clean way to increase the height of the bookmarks toolbar? I've read a lot of articles that refer to userChrome.css and I have tried a dozen solutions, but none worked because they were outdated. Please help me with this.

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  • hp officejet 5510 is only printing blank pages if used with Ubuntu 9.10

    - by mutzel
    I'm trying to setup a hp officejet 5510 using HPLIP 3.10.2 under Ubuntu 9.10. The installation of the driver according to this guide was no problem but after installing and selecting the printer I was only able to print blank pages. The printer is working well under windows and scanning (its a multi-functional printer) is also possible under Ubuntu. Does anyone know this problem and a possible solution?

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  • PDF form (not) saving

    - by gregseth
    Hi, I've created a form in a PDF with Adobe Acrobat Pro. When empy, I want to use it as a template which the user opens, fills in, and saves as a copy to preserve the blank state of the template. Here's the trick : I found both ways to make the document read only - the user can't save the form value, only print them make the document writeable, but in this case the document acting as a template can be modified too. Any ideas? Thanks.

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  • How do I write code of more than 1 line in the Python interpreter?

    - by Sandro Dzneladze
    I have a problem coding Python in terminal. I'm just learning basics so I have no need to create .py files. In terminal I can run one line of code in the Python interpreter, but how do I write more than one line? Obviously if I hit enter, it enters the command and doesn't go down a line. I just want to test following in terminal: my_age = 35 my_eyes = 'Blue' print "my age is %d and my eye color is %s" % (my_age, my_eyes)

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  • How to restore OEM software after upgrade from Vista to WIndows 8 on Notebook, Aspire 6935G

    - by Rocky
    Recently I upgraded my notebook from Vista home premium to windows 8 pro, now after updating most of the preinstalled programs by Acer, I've found out they are not restored as before. For example, I can't access my hidden hard disk drive utility, finger print scanner, etc. Please tell me how to restore all these programs by Acer on Windows 8 pro which were originally available when I purchased my notebook with Vista.

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  • Scan HTML for unused assets i folders

    - by Byran
    I have a aging website I'm managing and I'd like to remove all unused external files (.css, .jpg, .js, etc.) that are currently in various folders all over the site. Is there a tool out there that can help me identify and/or remove these for me?

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  • Will spreading your servers load not just consume more recourses

    - by Saif Bechan
    I am running a heavy real-time updating website. The amount of recourses needed per user are quite high, ill give you an example. Setup Every visit The application is php/mysql so on every visit static and dynamic content is loaded. Recourses: apache,php,mysql Every second (no more than a second will just be too long) The website needs to be updated real-time so every second there is an ajax call thats updates the website. Recourses: jQuery,apache,php,mysql Avarage spending for single user (spending one minute and visited 3 pages) Apache: +/- 63 requests / responsess serving static and dynamic content (img,css,js,html) php: +/- 63 requests / responses mysql: +/- 63 requests / responses jquery: +/- 60 requests / responses Optimization I want to optimize this process, but I think that maybe it would be just the same in the end. Before implementing and testing (which will take weeks) I wanted to have some second opinions from you guys. Every visit I want to start off with having nginx in the front and work as a proxy to deliver the static content. Recources: Dynamic: apache,php,mysql Static: nginx This will spread the load on apache a lot. Every Second For the script that loads every second I want to set up Node.js server side javascript with nginx in te front. I want to set it up that jquery makes a request ones a minute, and node.js streams the data to the client every second. Recources: jQuery,nginx,node.js,mysql Avarage spending for single user (spending one minute and visited 3 pages) Nginx: 4 requests / responsess serving mostly static conetent(img,css,js) Apache: 3 requests only the pages php: 3 requests only the pages node.js: 1 request / 60 responses jquery: 1 request / 60 responses mysql: 63 requests / responses Optimization As you can see in the optimisation the load from Apache and PHP are lifted and places on nginx and node.js. These are known for there light footprint and good performance. But I am having my doubts, because there are still 2 programs extra loaded in the memory and they consume cpu. So it it better to have less programs that do the job, or more. Before I am going to spend a lot of time setting this up I would like to know if it will be worth the while.

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  • Printing barcode labels

    - by BoundforPNG
    I am trying to print barcodes for a library. I have generated a list of sequential numbers and copied them into Word 2003. I want Library name, barcode font, barcode number printed in an Avery 5160 label sheet. I can get it to work by going to tools, letters and mailing, Envelopes and Labels, labels tab and type in what data I want. I don't see how I can pull this data from the list in the word document rather than just what I type.

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  • How can I set up a database (SQL?) for literary annotations?

    - by Jon
    I'm a literature student and I'd like to be able to annotate literary texts (originally stored in HTML or as text files) on a word-by-word or line-by-line basis. I hear databases like mySQL or SQLite would be good ways to do this sort of thing, but I don't really know where to start. I'm comfortable with the linux command-line, and have done some HTML/CSS work in the past, so I feel unintimidated by databases and things...I just don't know what to start doing.

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