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• Cannot Login To phpMyAdmin

  - by Zach Dziura

  I'm running a simple LAMP server at home from which I host a personal blog. The server is running Arch Linux, with the latest-and-greatest versions of Apache, MySQL, and PHP. In order to easily maintain the databases, I installed phpMyAdmin. However, I cannot login. If I were to SSH into the server and run mysql -u <user> -p <password>, no errors show up and I'm immediately placed into the MySQL prompt. No problem. However, when I try to log in with phpMyAdmin, using those exact same credentials, nothing happens. No errors, no nothing, I'm just redirected back to the login page. Did I do something wrong? Thanks in advance for any and all answers!

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• code to ping websites works sometimes ...

  - by trustfundbaby

  I'm testing out a piece of code to ping a bunch of websites I own on a regular basis, to make sure they're up. I'm using rails and so far I have this hideous test action that I'm using to try it out (see below). The problem though, is that sometimes it works, and other times it won't ... sometimes it runs through the code just fine, other times, it seems to completely ignore the begin/rescue block ... a. I need help figuring out what the problem is b. And refactoring this to make it look respectable. Your help is much appreciated. require 'net/http' require 'uri' def ping @sites = NewsSource.all @sites.each do |site| if site.uri and !site.uri.empty? uri = URI.parse(site.uri) response = nil path = uri.path.blank? ? '/' : uri.path path = uri.query.blank? ? path : "#{path}?#{uri.query}" begin Net::HTTP.start(uri.host, uri.port) {|http| http.open_timeout = 30 http.read_timeout = 30 response = http.head(path) } if response.code.eql?('200') or response.code.eql?('301') or response.code.eql?('302') site.up = true else site.up = false end site.up_check_msg = response.message site.up_check_code = response.code rescue Errno::EBADF rescue Timeout::Error site.up = false site.up_check_msg = 'timeout' site.up_check_code = '408' end site.up_check_time = 0.seconds.ago site.save end end end

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• Login authentication vanished from MongoDB install

  - by Robert Oschler

  A few months ago I enabled password protection on my MongoDB install. Today I ran the Mongo client and forgot to use my login details. Instead of rejecting nearly everything I try to do from the shell, like it should, I had complete access to all the databases and collections. Fortunately this instance is only running a few test apps, so I quickly shutdown the MongoD instance until I figure this out. Has anybody ever seen this kind of behavior before and knows what is going on? The MongoD instance is running on a Linux VM hosted by Azure. The only thing I can think of is that perhaps Azure restored an old copy of the VM, but I received no E-mails to that effect and everything else on the server seems to be proper, including new daemon processes that I added after I enabled password protection on MongoD.

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• How do I refactor code into a subroutine but allow for early exit?

  - by deworde

  There's a really obvious refactoring opportunity in this (working) code. bool Translations::compatibleNICodes(const Rule& rule, const std::vector<std::string>& nicodes) { bool included = false; // Loop through the ni codes. for(std::vector<std::string> iter = nicodes.begin(); iter != nicodes.end(); ++iter) { // Match against the ni codes of the rule if(rule.get_ni1() == *iter) { // If there's a match, check if the rule is include or exclude const std::string flag = rule.get_op1(); // If include, code is included unless a later rule excludes it if(flag == "INCLUDE"){ included = true; } // If exclude, code is specifically excluded else if(flag == "EXCLUDE"){ return false; } } if(rule.get_ni2() == *iter) { const std::string flag = rule.get_op2(); if(flag == "INCLUDE"){ included = true; } else if(flag == "EXCLUDE"){ return false; } } if(rule.get_ni3() == *iter) { const std::string flag = rule.get_op3(); if(flag == "INCLUDE"){ included = true; } else if(flag == "EXCLUDE"){ return false; } } if(rule.get_ni4() == *iter) { const std::string flag = rule.get_op4(); if(flag == "INCLUDE"){ included = true; } else if(flag == "EXCLUDE"){ return false; } } if(rule.get_ni5() == *iter) { const std::string flag = rule.get_op5(); if(flag == "INCLUDE"){ included = true; } else if(flag == "EXCLUDE"){ return false; } } } return included; } The problem is that I can't get around the problem that I want to exit early if it's an exclude statement. Note that I can't change the structure of the Rule class. Any advice?

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• ASP.NET/C#: How to use a Subclassed Control on a Page?

  - by Bob Kaufman

  I've subclassed DropDownList to add functionality specific to my application: public class MyDropDownList : DropDownList { ... } ... then referenced it in Web.Config, which is where I figure things start to go wrong: <pages theme="Main"> <controls> <add tagPrefix="bob" tagName="MyDropDownList" src="~/Components/MyDropDownList.cs" /> </controls> </pages> my reference to it does not work: <tr><td>Category</td> <td><bob:MyDropDownList runat="server" ID="Category"... /> and my best clue is the complier error message: "The file 'src' is not a valid [sic] here because it doesn't expose a type." I figure I'm misapplying knowledge of how to create a Web User Control here. What I want to be able to do is refer to this control on an ASP.NET page just like I would the parent DropDownList. Refactoring back into a Web User Control that contains a DropDownList is not desirable, because I want to apply a RequiredFieldValidator to it.

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• What are Code Smells? What is the best way to correct them?

  - by Rob Cooper

  OK, so I know what a code smell is, and the Wikipedia Article is pretty clear in its definition: In computer programming, code smell is any symptom in the source code of a computer program that indicates something may be wrong. It generally indicates that the code should be refactored or the overall design should be reexamined. The term appears to have been coined by Kent Beck on WardsWiki. Usage of the term increased after it was featured in Refactoring. Improving the Design of Existing Code. I know it also provides a list of common code smells. But I thought it would be great if we could get clear list of not only what code smells there are, but also how to correct them. Some Rules Now, this is going to be a little subjective in that there are differences to languages, programming style etc. So lets lay down some ground rules: ** ONE SMELL PER ANSWER PLEASE! & ADVISE ON HOW TO CORRECT! ** See this answer for a good display of what this thread should be! DO NOT downmod if a smell doesn't apply to your language or development methodology We are all different. DO NOT just quickly smash in as many as you can think of Think about the smells you want to list and get a good idea down on how to work around. DO downmod answers that just look rushed For example "dupe code - remove dupe code". Let's makes it useful (e.g. Duplicate Code - Refactor into separate methods or even classes, use these links for help on these common.. etc. etc.). DO upmod answers that you would add yourself If you wish to expand, then answer with your thoughts linking to the original answer (if it's detailed) or comment if its a minor point. DO format your answers! Help others to be able to read it, use code snippets, headings and markup to make key points stand out!

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• What would you write in a consitution (law book) for a programmers' country?

  - by Developer Art

  After we have got our great place to talk about professional matters and sozialize online - on SO, I believe the next logical step would be to found our own country! I invite you all to participate and bring together your available resources. We will buy an island, better even a group of island so that we could establish states like .NET territories, Java land, Linux republic etc. We will build a society of programmers (girls - we need you too). To the organizational side, we're going to need some constitution or a law book. I suggest we write it together. I make it a wiki as it should be a cooperative effort. I'll open the work. Section 1. Programmers' rights. Every citizen has a right to an Internet connection 24/7. Every citizen can freely choose the field of interest Section 2. Programmers' obligations. Every citizen must embrace the changing nature of the profession and constanly educate himself Section 3. Law enforcement. Code duplication when can be avoided is punished by limiting the bandwith speed to 64Kbit for a period of one week. Using ugly hacks instead of refactoring code is punished by cutting the Internet connection for a period of one month. Usage of technologies older than 5/10 years is punished by restricting the web access to the sites last updated 5/10 years ago for a period of one month. Please feel free to modify and extend the list. We'll need to have it ready before we proceed formally with the country foundation. A purchase fund will be established shortly. Everyone is invited to participate.

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• Mirroring MySQL server with diffrent configuration

  - by HTF

  I have to migrate MySQL server to a different data centre so I would like to create another MySQL slave server in new DC and then promote it to a master later on. I previously used LVM snapshots and Percona Xtrabackup for this purpose but this time I've optimized MySQL configuration file that prevents me from using these methods. Old server (backup): innodb_log_file_size = 256M innodb_log_files_in_group = 3 New server (restore): innodb_log_file_size = 512M innodb_log_files_in_group = 2 The Xtrabackup script and LVM snapshots copy the whole directory structure so the MySQL server won't start because there is a different size for InnoDB logs. Is there any solution to avoid a downtime in this case? I can't use mysqldumps as there is around 8000 databases so I would have to take the server down for a couple of hours. I was also thinking to use the old settings with Xtrabackup and then change it once the new server is promoted to a master - less downtime but I'm not sure if this will work? Thank you Regards

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• How to Script a backup for each database on an MSSQL Engine?

  - by Geo

  We need to backup 40 databases inside an MS SQL Server Engine. We backup each database with the following script: BACKUP DATABASE [dbname1] TO DISK = N'J:\SQLBACKUPS\dbname1.bak' WITH NOFORMAT, INIT, NAME = N'dbname1-Full Database Backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10 GO declare @backupSetId as int select @backupSetId = position from msdb..backupset where database_name=N'dbname1' and backup_set_id=(select max(backup_set_id) from msdb..backupset where database_name=N'dbname1' ) if @backupSetId is null begin raiserror(N'Verify failed. Backup information for database ''dbname1'' not found.', 16, 1) end RESTORE VERIFYONLY FROM DISK = N'J:\SQLBACKUPS\dbname1.bak' WITH FILE = @backupSetId, NOUNLOAD, NOREWIND GO We will like to add to the script the functionality of taking each database and replacing it in the above script. Basically a script that will create and verify each database backup from an engine. I am looking for something like this: For each database in database-list sp_backup(database) // this is the call to the script above. End For any ideas?

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• Should I go for Arrays or Objects in PHP in a CouchDB/Ajax app?

  - by karlthorwald

  I find myself converting between array and object all the time in PHP application that uses couchDB and Ajax. Of course I am also converting objects to JSON and back (for sometimes couchdb but mostly Ajax), but this is not so much disturbing my workflow. At the present I have php objects that are returned by the CouchDB modules I use and on the other hand I have the old habbit to return arrays like array("error"="not found","data"=$dataObj) from my functions. This leads to a mixed occurence of real php objects and nested arrays and I cast with (object) or (array) if necessary. The worst thing is that I know more or less by heart what a function returns, but not what type (array or object), so I often run into type errors. My plan is now to always cast arrays to objects before returning from a function. Of course this implies a lot of refactoring. Is this the right way to go? What about the conversion overhead? Other ideas or tips? Edit: Kenaniah's answer suggests I should go the other way, this would mean I'd cast everything to arrays. And for all the Ajax / JSON stuff and also for CouchDB I would use $myarray = json_decode($json_data,$assoc = true); //EDIT: changed to true, whcih is what I really meant Even more work to change all the CouchDB and Ajax functions but in the end I have better code.

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• sa account gets locked out frequently

  - by bala

  I have an sql server 2008 installed. there are about 6 databases created and running on this server I often get message like "SA account is locked out" is there any specific reasons for this account being locked out? is there any other place I need to check the reasons ( I checked the eventviwer but could not get much information) Edit: i found this information in teh eventviewer backups. Is this the cause? SQL Server failed to communicate with filter daemon launch service (Windows error: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it. ). Full-Text filter daemon process failed to start. Full-text search functionality will not be available.

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• Nginx proxy to Apache - resolve HTTP ORIGIN

  - by Fratyr

  I have a server setup with nginx serving static content and proxy all PHP/dynamic requests to apache on 127.0.0.1 I'm building an API for my databases, and I need to allow clients by their origin (domain name), rather than just IP. Based on CORS rules. So when I send an HTTP header header("Access-Control-Allow-Origin: www.client-requesting.myapi.com"); from my API server, I have to tell it which origin I allow, otherwise client side requests won't work to my API due to same-origin policy. The question is how can I know which domain name (if any) called my API? What should be the nginx and apache configuration to pass the origin parameter? I tried to google, and all I found is some possible solution with mod_rpaf, but I wanted to be sure. Thanks!

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• Using sed to convert hex characters in postgresql dump file

  - by Bernt

  I am working on moving several databases from a Postgresql 8.3 server to a Postgresql 8.4 server. It has worked fine so far, but one base has given me some trouble. The database is listed as unicode-encoded in the 8.3-server, but somehow a client program has managed to inject some invalid unicode data into it. When I do a normal dump and restore using postgres' custom format, the new server won't accept it, complaining about unicode errors. My plan is to do a plain text dump of the database, then use sed to replace the invalid characters with nothing (they are not needed). But how do you make sed work on hex/binary values in a file?

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• how to manage credentials/access to multiple ssh servers

  - by geoaxis

  I would like to make a script which can maintain multiple servers via SSH. I want to control the authentication/authorization in such a manner that authentication is done by gateway and any other access is routed through this ssh server to internal services without any further authentication/authorization requirements. So if a user A can log into server_1 for example. He can then ssh to server_2 without any other authentication and do what ever he is allowed to do on server_2 (like shut down mysql, upgrade it and restart it. This could be done via some remote shell script). The problem that I am trying to solve is to come up with a deployment script for a JavaEE system which involves databases and tomcat instances. They need to be shutdown and re-spawned. The requirement is to have a deployment script which has minimal human interaction as possible for both developers and operation.

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• Bash script getting automatically deleted from Ubuntu 12.04 Server?

  - by Kris Anderson

  I'm running a bash script on an ubuntu 12.04 through cron. The script works fine for a few weeks (runs daily backups of websites, mysql databases, and copies to Amazon S3). However, twice now I've noticed that backups stopped happening. Both times the backup script (backupscript.sh) located in my home folder was no longer there. No one else has access to this server, so nothing was manually changed on the server and no one deleted the file by mistake. The cron job (nano /etc/crontab) still references this script, but the script itself disappears. What could cause this to happen? Does Ubuntu delete the script if it runs into some sort of error?

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• How to take mysql replication backup

  - by user53864

  I have a MySQL master-master replication setup with a slave for each master(only one master used for read/writes at a time) on Ubuntu server. Wondering what would be the best way to schedule backup of replication databases with mysqldump. I have following clarifications because of which could not proceed further. Scheduling mysqldump backup on masters safe for replication? Connecting masters with GUI applications(workbench) for database manipulations(read, writes.. by developers) is safe? Any inputs are welcome.

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• How to completely remove MySQL from Windows?

  - by Nathan Long

  (I realize there are similarly-titled questions, but this one is really 'how do I reset the password', and this one doesn't specify an OS and has only gotten Linux-oriented answers.) On Windows XP, I just uninstalled MySQL and deleted the folder that it was installed in. I then rebooted and reinstalled MySQL. When it comes back up, it still has the databases it had before the uninstall. Where did it keep that database info? How do I completely remove MySQL and start over, as if I'd never installed it?

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• General High-Level Assessment

  - by tcarper

  Guys and Gals, I've been tasked with a doozy of an assignment. The objective is something akin to "laying of hands" on several database servers which work in concert to provide data to various Web, Client-Server and Tablet-Sync'd distributed Client-Server programs. More specifically, I've been asked to come up with a "Maintenance Plan" which includes recommendations for future work to improve these machines' performance/reliability/security/etc. Might there be some good articles on teh interwebs ya'll could point me towards which would give me some good basis to start? Articles describing "These are the top 4 overarching categories and this is how you should proceed when drilling down on each of them" sort-of-thing would be fabulous. The Databases are all SQL 2005, however the compatibility level is 80 and they were originally created with ERwin based on SQL 6.5. The OSs are all Windows Server 2003. Thanks all! Tim

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• Backup and restore MySQL database without system access

  - by Sencerd

  Hi guys, I am trying to move a database from 1 provider to another, the problem is that I don't have system access at either end (ie, no ssh), so I cannot use a mysqldump. I have already tried using MySQL Administrator, the backup took about 45 minutes, but when it came to restoring it was moving at a snails pace, and estimating 12+ hours. This is a live app so I need to keep the downtime to an absolute minimum. The database consists of 35 tables, a mixture of MyISAM and InnoDB, the whole thing comes to about 4.4GB. The source and destination databases are both running on very powerful servers. Any suggestions on a quick way of doing this will be gratefully received. Thanks

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• MySQL Server Not Starting on Boot

  - by Brian

  I have installed MySQL on a RHEL 5 server and I'm wanting to set it up so that the server starts on boot. I've ran the "chkconfig --list mysqld" command and it's currently running on levels 3, 4 and 5. However, when I reboot the server, no mysqld process is started. I've also tried manually starting the server by executing "/usr/bin/mysqld_safe" and I get the following output: Starting mysqld daemon with databases from /var/lib/mysql STOPPING server from pid file /var/run/mysqld/mysqld.pid 100319 10:31:30 mysqld ended I looked in /var/log/mysqld.log and I found the following: 100319 10:29:01 mysqld started 100319 10:29:02 InnoDB: Started; log sequence number 0 29752204 100319 10:29:02 [ERROR] Can't start server : Bind on unix socket: Permission denied 100319 10:29:02 [ERROR] Do you already have another mysqld server running on socket: /var/lib/mysql/mysql.sock ? 100319 10:29:02 [ERROR] Aborting

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• Looking for a good Web Server that is cheap

  - by SoLoGHoST

  I am a Project Manager, and former Lead Developer for a software portal system that requires a forum software to run. I am in need of a server that is cheap, reliable, and supports the latest PHP (5.2+), MySQL, unlimited e-mails (preferably), a cPanel, multiple sub-domains (atleast 3+). Currently I am paying $34.95 USD/month (approx. $420 USD/year). This is too high for me to pay to keep the site running. I just recently became Project Manager and in charge of Finances and I'm extremely concerned for the future of Dream Portal. With those prices I'm not sure I'll be able to keep it running for too long. Can someone please tell me of a good server that meets all of the requirements that I listed above that is cheaper on a yearly basis? Note: Currently on a Dedicated Server with limited disk space at 15000 MB (15 GB), monthly bandwidth = 500000 MB, 50 emails limit, 20 sub-domains limit, 30 FTP accts., and 25 SQL Databases.

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• Exchange - get age range of items using Powershell

  - by marcwenger

  We are going to be implementing personal archives for Exchange in our organization. For us to get a good grasp on how much space is needed, we need to get an idea of the age of items that we currently have. Is it possible to have a powershell script that tells me the total size and number of items given certain date ranges of all mailboxes in all databases? What I'd like to have is the 1) number of items, 2) total size of times (GB) - all grouped by date ranges (Less than 15 days, 15-30 days, 30-60 days, 60-90 days, more than 90). Another possibility would be to have it also grouped by mailbox database

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• MySQL Locking Up

  - by Ian

  I've got a innodb table that gets a lot of reads and almost no writes (like, 1 write for every 400,000 reads approx). I'm running into a pretty big problem though when I do INSERT into the table. MySQL completely locks up. It uses 100% cpu, and every single other table (in other databases even) have their statuses set to "Locked" until the INSERT is done. This is a big problem because MySQL stays locked up for up to 4 minutes. I'm using version 5.1.47 (rpm from mysql.com). Any ideas?

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• I'll be setting up a dedicated web server at work soon, my first non hobby server - What should I know?

  - by Rogue Coder

  I've been running my own dedicated server running CentOS and a LAMP stack for 2-3 years now, but it's only been hosting my own websites which aren't super important. However, I will soon be setting up a Linux Webserver and Linux Database Server at work, and I'm wondering what are some important things I should be doing. It's an internal server only, so only people in the company can access it. Should I get a slave server for both of my servers for backups? If I do this, how many backups should I be keeping and how often should those backups be done? Right now on my current server I run a cron job nightly to backup my MySQL databases (Usually 40mb files once compressed), and bi-weekly cron jobs to backup my web root. I just store these files on my local computer via FTP. Also, for an internal server like this, should I look at using LightHTTPD or NginX to increase performance, or will Apache be fine?

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• unable to connect to remote sql server from SHDSL router

  - by user529265

  Got a new leased line network to our office that came with a SHDSL router (Watson). Currently, we are unable to use Sql Server management studio to connect to remote Sql databases. It errors out saying A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: TCP Provider, error: 0 - The specified network name is no longer available.) (Microsoft SQL Server, Error: 64) I logged into the Watson management panel and unblocked all the ports for TCP traffic (specified the range as 0 to 60000 and UDP as well - this include 1443 required for connecting to SQL Server). The router is the only thing that has changed. We are able to connect to it from other networks just fine. Is there something we are missing here. Any help would be greatly appreciated.

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