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  • Approach to Selecting top item matching a criteria

    - by jkelley
    I have a SQL problem that I've come up against routinely, and normally just solved w/ a nested query. I'm hoping someone can suggest a more elegant solution. It often happens that I need to select a result set for a user, conditioned upon it being the most recent, or the most sizeable or whatever. For example: Their complete list of pages created, but I only want the most recent name they applied to a page. It so happens that the database contains many entries for each page, and only the most recent one is desired. I've been using a nested select like: SELECT pg.customName, pg.id FROM ( select id, max(createdAt) as mostRecent from pages where userId = @UserId GROUP BY id ) as MostRecentPages JOIN pages pg ON pg.id = MostRecentPages.id AND pg.createdAt = MostRecentPages.mostRecent Is there a better syntax to perform this selection?

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  • What is the compatible JQuery line of code for IE7 and IE8?

    - by user144842
    This line of code is working fine for Firefox $("#<%=txt1.ClientID%>").text() but not for IE8 and IE7. See the scenario below in order to understand what I really mean:- Scenario:- Loading .aspx page. populating text box with some data from database. Now user changes data in same text-box at client-side (means page not yet submitted) So here in firefox, the above line of javascript is showing me the actual data came from database, but IE7&8 showing me the changed data. But I want actual data. So i need some compatible code for IE7 & IE8 I hope i explained it well what i need. Thanks in advance

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  • Restful client on Codeigniter issue

    - by user1852837
    This is weird. I don't know what is problem on my website. My website works on local server but not on live server. Login page works on first signin but after logout then re-login again message says: "invalid username and password" since it works on first attempt. I found out when I debugging that http://xxxxx.com/api/authentication/sign not found. It display 404 page not found. Sometimes you can login and sometimes not. In my local it works. I contact the web server admin and I ask what is the status of the session on the server and How does it execute it's web requests? (Sockets, file_get_contents, curl?). They said that No problems reproduced with Server Sessions and PHP Curl works fine. I know it's weird but can somebody here can figure it out what is the problem behind of it.

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  • e-library system development

    - by mmcc
    I want to develop an web based library system, and it may feature a "add this book to cart" function, and in its cart page, user can set the book reservation date and click 'Ok' button to finish the reservation process. On the backend side, the admin management page can check that reservation request information. To achieve this function, which way can do so? 1. Asp.net MVC + C# + MSSQL 2. Dotnetnuke (i don't know if this CMS can help) or any idea ?

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  • Check if IsCallback on Application_BeginRequest

    - by user136405
    I have a web application (.NET 3.5) that has this code in Global.asax: Sub Application_BeginRequest(ByVal sender As Object, ByVal e As EventArgs) LinkLoader() PathRewriter() PathAppender() End Sub I want all those functions inside to get called except for when it's an AJAX call back. So, ideally I would have it changed to: Sub Application_BeginRequest(ByVal sender As Object, ByVal e As EventArgs) If not Page.IsCallback then LinkLoader() PathRewriter() PathAppender() End If End Sub But there is not access to the page object here. So, basically my question is: How do I check if the request is an AJAX call back inside Application_BeginRequest? Thank you very much for any feedback.

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  • Is it good to create a usercontrol for Recurrsive code in xaml?

    - by user281947
    <Border BorderBrush="#C4C8CC" BorderThickness="0,0,0,1"> <TextBlock x:Name="SectionTitle" FontFamily="Trebuchet MS" FontSize="14" FontWeight="Bold" Foreground="#3D3D3D" /> </Border> I have to use the same above format at many places in a single xaml page, so for this i created a usercontrol and defined the above code inside it. So my question is, what i am doing is it right approach ? Will it make the page to load slower then the above code used as it is without defining it in a new user control?

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  • Flex Builder I want to go from titleWindow to a panel.

    - by dejaninic
    Hi. I'm building an user login page and I want to go from titleWindow to Panel. I'm suing following function but it always takes me back to parentApplication. My question is how can I go to my panel and not to Application page. I know that I'm using parentApplication but what should I use instead??? Here is a part of my code: private function handleLogin(event:ResultEvent):void { Alert.show("You have succesfully logged in.", "Information", Alert.OK, null, null, null, Alert.OK); parentApplication.accountPage.mainService.getAccount(); PopUpManager.removePopUp(this); }

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  • Uninterrupted mp3 play on a website?

    - by Kevin
    Client is requesting a single track to be heard across the website. Generally I advise against it, but they insist. So, what is the most straightforward way of having a flash player embedded in a site, and when a user goes to another page there isn't a gap/interruption? I am thinking an iframe is required.. I am using a flash player that has autoresume, but that only solves picking up where you last left off on the song before going to another page. I tried searching SO for an answer..

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  • date enable disable

    - by Newbie
    I have an "add new product page" and I have a field in the database table "jos_stockmovement", "start_week" which contains data for the year and week. In my "Add New Product" page I have a field dropdown-list named "Start Week" which holds the year and week, for example, "2012/36". How do I disable the past week? I all I want to enable is the current week. Heres my code: <td colspan="99"> <%= fld.select :start_week, options_for_select( StockMovement.order("year DESC, week DESC").map { | val | [ "#{ val.year }/#{ val.week }", val.id ] }, :selected => @product.start_week ), :class => "ddl_SW" %> </td>

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  • How can I achieve a complicated CSS layout?

    - by Eric
    I have a page here. There is a contents panel, and a content panel. I would like to center the content, and push the contents panel to the top right corner. This behaviour already works. However, the layout does not work as I would like when the page is shrunk. Ideally, the content would be pushed to the right side of the screen, and a 5px gap maintained between the content and the contents. At present, however, the contents just overlaps the content, which isn't really what I want. Is such a layout possible, without resorting to javascript?

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  • Removing round corners from the button in jquery mobile

    - by user1435731
    I have following button markup in a single/multiple page jquerymobile page template. <a href="#" data-role="button" data-icon="arrow-r" data-iconpos="right" >About Us</a> I need to disable the round corners of this button using the button option as given in the jquerymobile docs. I have tried $('a').buttonMarkup({ corners: "false" }) in every events such as pagebeforecreate, pageinit, pagecreate and mobileinit I never got it working and have been struggling with it to make it for quite a long time. I dont want to use data attribute data-corners="false" for now. Please suggest any ideas

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  • Run ajaxed javascript

    - by user1905698
    I know this has been covered a few times, but I'm completely a noob when it comes to javascript so I have no idea what I'm doing. I am running a javascript that sends variables to a php file and that info is ajaxed into the current page using innerhtml. Here is that part of the code... `function givingHistory(dyear,did) { var divname="giving" + dyear; $.ajax({ url: 'finance/givinghistory.php', type: 'POST', data: { year: dyear, id: did }, success: function(givedata) { document.getElementById(divname).innerHTML = givedata; } }); } ` In the givedata function response from the php file there is a call to another javascript function that is already loaded in my common .js file (so both javascript functions are loaded when the page loads). How do I get the onClick that is added via innerhtml to work? Inside the php file, I check to see if id = a php session variable. If it does it spits out the text that includes the onClick.

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  • server not sending custom header values

    - by egza
    I'm using PHP 5.2.17 to get a remote page, the HTTP requests contains some cookie values but cookies are not delivered to the destination page. $url = 'http://somesite.com/'; $opts = array( 'http' => array ( 'header' => array("Cookie: field1=value1; field2=value2\r\n") ) ); $context = stream_context_create($opts); echo file_get_contents($url, false, $context); Can you help me find the problem? Note: I can't use curl. Thanks.

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  • 100% height table resets scroll offset

    - by koko
    Hi, this is more like a question of principle. I made a table with 100% width and height to make 3 rows nice and auto-resizable (welcome to xhtml :D). When I begin to toggle() some elements, the total size of the page changes, and my browser resets its scroll offset and scrolls all the way to the top of the page. Is there some way to prevent scrolling, except making a JS function to calculate the scroll offset and make it jump to its previous offset? I don´t want to mess around with 3 divs, trying to align them automatically in their height.

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  • Optimising a query for Top 5% of users

    - by Nai
    On my website, there exists a group of 'power users' who are fantastic and adding lots of content on to my site. However, their prolific activities has led to their profile pages slowing down a lot. For 95% of the other users, the SPROC that is returning the data is very quick. It's only for these group of power users, the very same SPROC is slow. How does one go about optimising the query for this group of users? You can assume that the right indexes have already been constructed. EDIT: Ok, I think I have been a bit too vague. To rephrase the question, how can I optimise my site to enhance the performance for these 5% of users. Given that this SPROC is the same one that is in use for every user and that it is already well optimised, I am guessing the next steps are to explore caching possibilities on the data and application layers?

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  • Drop down box is always 100%

    - by danit
    I have the following HTML: <div style="30px;"> <table width="100%;"> <tr> <td> <SELECT name="guidelinks"> <OPTION SELECTED value="jex6.htm">Page 1 <OPTION value="jex7.htm">My Cool Page </SELECT> </td> </tr> </table> When this drop down box is displayed the width is 100%, not 30px, can anyone explain why and how to fix this? Unofrtunatly I cant edit the code on the CSS

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  • 502 Bad Gateway - nginx

    - by ADH2
    I am randomly receiving 502 Bad Gateway error pages - I can reproduce this issue by modifying hosting plans in plesk 11 and in the same time refreshing a page for a minute or two. When I get the 502 error page all I have to do is refresh the browser and the page refreshes properly. i am using centos 6 this it from todays log (/var/log/nginx/error.log): 2012/12/04 10:52:07 [error] 21272#0: *545 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 82.77.68.111, server: likeit-craiova.ro, request: "GET / HTTP/1.1", upstream: "http://195.254.135.113:7080/", host: "likeit-craiova.ro" this is the nginx config (/etc/nginx/nginx.conf) #user nginx; worker_processes 1; #error_log /var/log/nginx/error.log; #error_log /var/log/nginx/error.log notice; #error_log /var/log/nginx/error.log info; #pid /var/run/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; proxy_buffer_size 128k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; #log_format main '$remote_addr - $remote_user [$time_local] "$request" ' # '$status $body_bytes_sent "$http_referer" ' # '"$http_user_agent" "$http_x_forwarded_for"'; #access_log /var/log/nginx/access.log main; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #tcp_nodelay on; #gzip on; #gzip_disable "MSIE [1-6]\.(?!.*SV1)"; server_tokens off; include /etc/nginx/conf.d/*.conf; } fastcgi config file (/etc/nginx/fastcgi.conf): fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param HTTPS $https if_not_empty; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; # PHP only, required if PHP was built with --enable-force-cgi-redirect fastcgi_param REDIRECT_STATUS 200; fastcgi parameters config (/etc/nginx/fastcgi_params): fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param HTTPS $https if_not_empty; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; # PHP only, required if PHP was built with --enable-force-cgi-redirect fastcgi_param REDIRECT_STATUS 200; alsow i'm getting this on a shared hosting server, on one of the domains: Unable to generate the web server configuration file on the host because of the following errors: nginx: [warn] duplicate MIME type "text/html" in /etc/nginx/nginx.conf:45 nginx: [emerg] open() "/var/www/vhosts/partydayandnight.ro/statistics/logs/proxy_access_log" failed (24: Too many open files) nginx: configuration file /etc/nginx/nginx.conf test failed Please resolve the errors in web server configuration templates and generate the file again. why is this appearing and what troubles may it cause? what can i do to get this errors fixed? thank you!

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  • Hosting a subversion working copy in an remote WebDAV folder

    - by Daniel Baulig
    This might be a bit awkward, but I'll try to explain what I am trying to achieve and what problems I encountered. First of all: whats this about? I am currently trying to set up a distributed working enviroment for developing a web page. My plan was to setup a SVN repository for version control, a live server where the actual live page ist hosted and a development server where I can work on the page. To ease things I intended to not have a local copy of the project on my disk, but to actually work directy on the files, that the development server hosts. For that I setup a WebDAV directory, under devserver.com/workspace, that actually mapped to files served under devserver.com/. So I could connect to devserver.com/workspace, change something and view the results live at devserver.com/. So far this worked perfectly. The next step was to create a SVN repository that would take care of my version control. I intended to be able to checkin to the reposiroty from my development server and at any time, with a small shell script, deploy any revision from the svn to the live server by checking out a copy of the revision into the live server directories. The second part, checking out into the live server, also worked perfectly. The first part though is where problems arose: My workstation is a Windows 7 machine. I connected to the WebDAV share using Windows built-in WebDAV support, which worked quite well. I can create, move, delete, edit, whatever files on my WebDAV share from my Windows machine perfectly. The next step was to checkout a working copy from the SVN (actually hosted at devserver.com/subversion/) into the WebDAV share. In the first try I used the Eclipse plugin subversive. The actual checkout worked fine and I can update and commit stuff to the repository, however, I cannot add any files to the ignore list. It always brings me an error. So I tried the same thing with a complete fresh repository using TortoiseSVN - and again it failed with the same errors. Here is what it says when trying to add files to svnignore: Some of selected resources were not added to ignore. svn: Cannot rename file '\\devserver.com@SSL\DavWWWRoot\workspace\.svn\tmp\dir-props.66fd8936-2701-0010-bb76-472f0b56a5d1.tmp' to '\\devserver.com@SSL\DavWWWRoot\workspace\.svn\tmp\dir-props' This is what apache2 tells me, when I try to add a file to svnignore: [Sun Mar 07 03:54:19 2010] [error] [client xxx.xxx.xxx.xxx] Negotiation: discovered file(s) matching request: /var/www/devserver.com/.svn/tmp/dir-props (None could be negotiated). [Sun Mar 07 03:54:31 2010] [error] [client xxx.xxx.xxx.xxx] (20)Not a directory: The URL contains extraneous path components. The resource could not be identified. [400, #0] Actually both messages are repeated several times. The first one occurs first and is repeated about 5 times and the second comes there after and is repeated propably more than 20 times. If I create a regular file, delete, rename or modify it none of those messages appear in my error.log While writing this question now I was able to add fils to svnignore using TortoiseSVN. However, after that, Eclipse would not let me commit anymore. The error that used to pop up when adding files to svnignore now also shows up while commiting. While searching the web I found some people having this same message appearing because they had files only different in upper- / lower-case naming. I checked my repository and did not find such files. I also read somewhere about people having troubles with WebDAV and file locking, because WebDAV's file locking capabilities seem to be very limited. At some stage I got errors telling me my repository was locked and thus the operations could not be completed. This error though did not appear anymore, since I setup a completely fresh repository and working copy. I would really appreciate any help anyone can provide me in fixing this problem! If there are any more questions feel free to ask. I know this is a somewhat unusual setup. Best regards, Daniel

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  • Nginx + PHP-FPM = "Random" 502 Bad Gateway

    - by david
    I am running Nginx and proxying php requests via FastCGI to PHP-FPM for processing. I will randomly receive 502 Bad Gateway error pages - I can reproduce this issue by clicking around my PHP websites very rapidly/refreshing a page for a minute or two. When I get the 502 error page all I have to do is refresh the browser and the page refreshes properly. Here is my setup: nginx/0.7.64 PHP 5.3.2 (fpm-fcgi) (built: Apr 1 2010 06:42:04) Ubuntu 9.10 (Latest 2.6 Paravirt) I compiled PHP-FPM using this ./configure directive ./configure --enable-fpm --sysconfdir=/etc/php5/conf.d --with-config-file-path=/etc/php5/conf.d/php.ini --with-zlib --with-openssl --enable-zip --enable-exif --enable-ftp --enable-mbstring --enable-mbregex --enable-soap --enable-sockets --disable-cgi --with-curl --with-curlwrappers --with-gd --with-mcrypt --enable-memcache --with-mhash --with-jpeg-dir=/usr/local/lib --with-mysql=/usr/bin/mysql --with-mysqli=/usr/bin/mysql_config --enable-pdo --with-pdo-mysql=/usr/bin/mysql --with-pdo-sqlite --with-pspell --with-snmp --with-sqlite --with-tidy --with-xmlrpc --with-xsl My php-fpm.conf looks like this (the relevant parts): ... <value name="pm"> <value name="max_children">3</value> ... <value name="request_terminate_timeout">60s</value> <value name="request_slowlog_timeout">30s</value> <value name="slowlog">/var/log/php-fpm.log.slow</value> <value name="rlimit_files">1024</value> <value name="rlimit_core">0</value> <value name="chroot"></value> <value name="chdir"></value> <value name="catch_workers_output">yes</value> <value name="max_requests">500</value> ... I've tried increasing the max_children to 10 and it makes no difference. I've also tried setting it to 'dynamic' and setting max_children to 50, and start_server to '5' without any difference. I have tried using both 1 and 5 nginx worker processes. My fastcgi_params conf looks like: fastcgi_connect_timeout 60; fastcgi_send_timeout 180; fastcgi_read_timeout 180; fastcgi_buffer_size 128k; fastcgi_buffers 4 256k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_intercept_errors on; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length; fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version; fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name; fastcgi_param REDIRECT_STATUS 200; Nginx logs the error as: [error] 3947#0: *10530 connect() failed (111: Connection refused) while connecting to upstream, client: 68.40.xxx.xxx, server: www.domain.com, request: "GET /favicon.ico HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.domain.com" PHP-FPM logs the follow at the time of the error: [NOTICE] pid 17161, fpm_unix_init_main(), line 255: getrlimit(nofile): max:1024, cur:1024 [NOTICE] pid 17161, fpm_event_init_main(), line 93: libevent: using epoll [NOTICE] pid 17161, fpm_init(), line 50: fpm is running, pid 17161 [DEBUG] pid 17161, fpm_children_make(), line 403: [pool default] child 17162 started [DEBUG] pid 17161, fpm_children_make(), line 403: [pool default] child 17163 started [DEBUG] pid 17161, fpm_children_make(), line 403: [pool default] child 17164 started [NOTICE] pid 17161, fpm_event_loop(), line 111: ready to handle connections My CPU usage maxes out around 10-15% when I recreate the issue. My Free mem (free -m) is 130MB I had this intermittent 502 Bad Gateway issue when in was using php5-cgi to service my php requests as well. Does anyone know how to fix this?

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  • Chrome does not re-draw properly on Windows 8

    - by Akshat Mittal
    There are a lot of problems with Chrome (24.0.1312.14 beta || But all this happened before update also) on Windows 8. Problems and explanations are listed below: Google Chrome re-draw time: When I switch tabs, the window retains the content of the previous tab and displays that even if I move my mouse, if only refreshes (re-draws) when there is a change on the webpage (like on hover) or I do a select all (or scroll). One thing to note is that the hover and select happens on the real page and not the retained image-like thing of the older webpage. Chrome is slow and laggy: Websites such as Facebook and Twitter (and more) have gone extremely laggy on Chrome (Win 8). When I was using Windows 7, I never experienced a lag or something. Also when using HTML-5 Websites, the transition (the -webkit-transition in CSS) goes extremely slow at times. Plugins Crash: Plugins like Flash Player, Shockwave Player, and more that are in-built into Chrome Crashes a lot, even when doing simple tasks like playing YouTube Videos, displaying ads or something. Chrome Crashes: Chrome has crashed over 100 times in the past month. Google Chrome just crashes randomly or I don't know the reason. Random Page crashes: Chrome results chrome://crash/(Copy-Paste this in address bar) on random pages even when the page is just loaded, I understand that this can happen on heavy HTML5 or JS websites but what about HTML only websites? Computer Freeze: Chrome sometimes, randomly, freezes my computer. Freeze in the sense, none of the other apps are also working. It's like the whole system freezes, I can not even switch to other apps. I am sure that this is because of Chrome since this happens only when Chrome is active. Most of the things above happens on Super User also, Super User never had any problem when using Chrome on Windows 7. UPDATE 1: @magicandre1981 Commented for trying to disable Hardware Acceleration. I tried it, it somewhat solved the problem but din't fix it. I am still experiencing all the above issues but less frequently (maybe because Chrome Restarted Completely) UPDATE 2: @avirk asked me to try a Stable Version of Chrome and Firefox, I din't experience any lag in Firefox, a little (negligible) lag in Chrome 22 (Maybe because its a new copy of Chrome, I haven't used it much). UPDATE 3: @NothingsImpossible said that He is also experiencing the same problem on Windows Server 2008! This seams to be a major issue now. He also said that GPU load is also high at the same time! Even I saw the same thing. UPDATE 4: Recently, Chrome updated to v24 Stable (I am using stable from a long time now). I was experiencing this problem a lot less in Chrome 23, but this is back in Chrome 24. Seams like Chrome 24 is the most affected from this bug, as this same problem was high in Chrome 24 beta also. UPDATE 5: Chrome was updated to v25 Stable. This problem is 99% Gone, it is still there in 1% of the cases. One such example is when I leave chrome inactive for a while with a few tabs open, the tabs go black and no activity can get them back to active state. If I open a new tab, the new tab is OK but the others are still black, I need to close all those tabs. UPDATE 6: Chrome updated to v27 Stable channel, this problem is nearly gone. This does happen occasionally, but not as frequent as in earlier versions of Chrome. UPDATE 7: I am on Chrome v35.0.1916.114 Stable, Windows 8.1 Pro Update 1. Some of the other problems appears to be back. Chrome is slow and laggy again. Re-draw time is getting worse. Is anybody else experiencing such issues? Does anybody have a solution to any of these?

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  • Apache mod_jk Setting for Tomcat - workers.properties

    - by sissonb
    I am trying to direct files with .jsp extensions to tomcat. Otherwise I want apache to serve the file directly (no tomcat). Currently I have a test.jsp which is supposed to create an HTML page with the current date in the body. Instead when I go to that .jsp I see the JK Status Manager. The mod_jk.logs only show, init_jk::mod_jk.c (3365): mod_jk/1.2.35 initialized. I have tomcat and apache setup on my server. Apache runs on 80 and tomcat runs on 8080. localhost:8080 show the tomcat welcome page. I downloaded tomcat-connectors-1.2.35-windows-i386-httpd-2.2.x and copied the mod_jk.so to C:\apache\modules. Then I added LoadModule jk_module modules/mod_jk.so to my httpd.conf. I restart apache and the module loads just fine. Next I downloaded the mod_jk source to get the workers.properties file. I copy workers.properties to C:\apache\confg. Then I added this user, workers.tomcat_home="C:/Program Files/Apache Software Foundation/Tomcat 7.0" workers.java_home="C:/Program Files/Java/jdk1.7.0_03" worker.list=ajp13 worker.ajp13.port=8080 worker.ajp13.host=localhost worker.ajp13.type=ajp13 worker.ajp13.socket_timeout=10 When I try to use the ajp13 user in my httpd.conf I get the following error in my mod_jk.log, [Wed Mar 28 13:08:51 2012] [2196:4100] [info] ajp_connection_tcp_get_message::jk_ajp_common.c (1258): (ajp13) can't receive the response header message from tomcat, network problems or tomcat (127.0.0.1:8080) is down (errno=60) [Wed Mar 28 13:08:51 2012] [2196:4100] [error] ajp_get_reply::jk_ajp_common.c (2117): (ajp13) Tomcat is down or refused connection. No response has been sent to the client (yet) [Wed Mar 28 13:08:51 2012] [2196:4100] [info] ajp_service::jk_ajp_common.c (2614): (ajp13) sending request to tomcat failed (recoverable), (attempt=1) Next I update my httpd.conf with, JkWorkersFile C:/apache/conf/workers.properties JkLogFile C:/apache/logs/mod_jk.log JkLogLevel info JkLogStampFormat "[%a %b %d %H:%M:%S %Y] " Also I added JkMount /*.jsp jk-status to my virtual host like this, <VirtualHost 192.168.5.250:80> JkMount /*.jsp jk-status #JkMount /*.jsp ajp13 ServerName bgsisson.com ServerAlias www.bgsisson.com DocumentRoot C:/www/resume </VirtualHost> I think i need to include a uriworkermap.properties file, but this is where I am getting stuck. I have put up a test .jsp at bgsisson.com/test.jsp It shows the JK Status Manager when I use JkMount /*.jsp jk-status and 502 Bad Gateway when I use JkMount /*.jsp ajp13 test.jsp <%-- use the 'taglib' directive to make the JSTL 1.0 core tags available; use the uri "http://java.sun.com/jsp/jstl/core" for JSTL 1.1 --%> <%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %> <%-- use the 'jsp:useBean' standard action to create the Date object; the object is set as an attribute in page scope --%> <jsp:useBean id="date" class="java.util.Date" /> <html> <head><title>First JSP</title></head> <body> <h2>Here is today's date</h2> <c:out value="${date}" /> </body> </html>

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  • Unable to make the session state request to the session state server

    - by Angry_IT_Guru
    For about 4-5 months now, I seem to be having this sporadic issue--mainly during our busiest time of the day between 10:30-11:45AM, where all my Windows 2003 web servers in a Microsoft NLB cluster start throwing session state server errors. A sample error is below. System.Web.HttpException: Unable to make the session state request to the session state server. Please ensure that the ASP.NET State service is started and that the client and server ports are the same. If the server is on a remote machine, please ensure that it accepts remote requests by checking the value of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\AllowRemoteConnection. If the server is on the local machine, and if the before mentioned registry value does not exist or is set to 0, then the state server connection string must use either 'localhost' or '127.0.0.1' as the server name. at System.Web.SessionState.OutOfProcSessionStateStore.MakeRequest(StateProtocolVerb verb, String id, StateProtocolExclusive exclusiveAccess, Int32 extraFlags, Int32 timeout, Int32 lockCookie, Byte[] buf, Int32 cb, Int32 networkTimeout, SessionNDMakeRequestResults& results) at System.Web.SessionState.OutOfProcSessionStateStore.SetAndReleaseItemExclusive(HttpContext context, String id, SessionStateStoreData item, Object lockId, Boolean newItem) at System.Web.SessionState.SessionStateModule.OnReleaseState(Object source, EventArgs eventArgs) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Now I'm using ASP.NET State service on a centralized back-end Windows 2003 server that all servers communicate to. I was originally using SQL Server state for a couple years as well prior to having this issue. The problem with SQL wqas that when the issue occurred, it created a blocking situation which essentially impacted all users across all servers. The product company recommended that I use the standard ASP.NET State service as that was what they technically supported. Why this would make a difference is beyond me -- but I had no choice but to try it! I have attempted to create multiple application pools, adding additional servers, chaning TCP/IP timeout from 20 to 30 seconds, and even calling Microsoft ASP.NET product support, with very little success. I even recommended that they review whether they are using read-only session state instead of read/write per page request -- as I understand that this basically causes every page to make round-trips to state server even if state isn't being used on the page. Unfortunately, the application is developed by our product company and they insist that it is something with my environment because other clients do not have these sort of issues. However, I've talked to other clients and they tell me when they've seen issues like they, they've basically had to create another web farm. This issue almost seems like I've simply reached some architectural limit within the application... Microsoft's position on the issue is that the session state needs to be reduced and the returncode being reported back from the state server indicates buffers are full. To better understand the scope of issues (rather than wait for customers to call and complain), I installed ELMAH and configured it to send me e-mails when unhandled exceptions occur. I basically get 500-1000 e-mails during the time period of high activity! If any one has any other ideas I could try or better ways to troubleshoot, I'd appreciate it.

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  • http request via iptables --to-destination ip redirect results in no response

    - by Wouter Vegter
    I have two Ubuntu servers with each having their own ip addresses. Let's call them server1 and server2, having respectively ip 1.1.1.1 and 2.2.2.2 I have a nginx running on server2. The sole purpose I want server1 to have is to redirect all incoming http (so port 80) requests to server2 without clients noticing that their request is being redirected. I tried the following command on server1: iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-destination 2.2.2.2 But when I enter 1.1.1.1 in my browser I get no respond: the page keeps trying to load without giving any message or error message (I get a time-out after 2-3 mins). But when I do remove the above iptables rule I immediately do get a "page not found error" when I enter 1.1.1.1 in my browser; so something is working but not as it should: when I enter 1.1.1.1 I want the html page to load that is hosted on 2.2.2.2 Because when i enter 2.2.2.2 in my browser I do see the webpage loaded. Could anyone please help me with this? I am searching quite some time (on severfault & Google) on this now so that's why I ask. Many thanks for reading my question! Update: Thank you all for you information. Unfortunately I still get no response I have the following iptables configuration: root@ip-10-48-238-216:/home/ubuntu# sudo iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination root@ip-10-48-238-216:/home/ubuntu# sudo iptables -t nat -L Chain PREROUTING (policy ACCEPT) target prot opt source destination DNAT tcp -- anywhere anywhere tcp dpt:www to:2.2.2.2 Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination When i run tcpdump and do request via chrome to 1.1.1.1 i get the following root@ip-10-48-238-216:/home/ubuntu# sudo tcpdump -i eth0 port 80 -vv tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes 13:56:18.346625 IP (tos 0x0, ttl 52, id 12055, offset 0, flags [DF], proto TCP (6), length 60) 212-123-161-112.ip.telfort.nl.16386 ip-10-48-238-216.eu-west-1.compute.internal.www: Flags [S], cksum 0xb398 (correct), seq 2639758575, win 5840, options [mss 1460,sackOK,TS val 1223672 ecr 0,nop,wscale 6], length 0 13:56:18.346662 IP (tos 0x0, ttl 51, id 12055, offset 0, flags [DF], proto TCP (6), length 60) 212-123-161-112.ip.telfort.nl.16386 ww1dc1.shopreme.com.www: Flags [S], cksum 0x9ee0 (correct), seq 2639758575, win 5840, options [mss 1460,sackOK,TS val 1223672 ecr 0,nop,wscale 6], length 0 13:56:18.598747 IP (tos 0x0, ttl 52, id 10138, offset 0, flags [DF], proto TCP (6), length 60) 212-123-161-112.ip.telfort.nl.16387 ip-10-48-238-216.eu-west-1.compute.internal.www: Flags [S], cksum 0xac40 (correct), seq 2645658541, win 5840, options [mss 1460,sackOK,TS val 1223735 ecr 0,nop,wscale 6], length 0 13:56:18.598777 IP (tos 0x0, ttl 51, id 10138, offset 0, flags [DF], proto TCP (6), length 60) 212-123-161-112.ip.telfort.nl.16387 ww1dc1.shopreme.com.www: Flags [S], cksum 0x9788 (correct), seq 2645658541, win 5840, options [mss 1460,sackOK,TS val 1223735 ecr 0,nop,wscale 6], length 0 ^C 4 packets captured 4 packets received by filter 0 packets dropped by kernel the mentioned address relate to the following 212-123-161-112.ip.telfort.nl.16386 : my personal computer ww1dc1.shopreme.com.www : dns of server2 (2.2.2.2) ip-10-48-238-216.eu-west-1.compute.internal.www : amazon web services ec2 internal address of server1 (1.1.1.1) However, the tcpdump log on server2 (2.2.2.2) stays empty and I get no response back in my browser. I am able to ping from server1 to server2. And net.ipv4.ip_forward is set to 1 and so is /proc/sys/net/ipv4/ip_forward Could there be anything else that is missing?

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