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• DNS slows down on development environment

  - by Sequenzia

  I have a local development environment setup on my Mac. I am running an Ubuntu Web Server inside of a Virtual Box VM. I setup a host file on my Mac that points my dev site to the IP of the Ubuntu Virtual Server. Everything works good other than the fact a lot (not all) of the time it takes more than 5 seconds to load a page. I used firebug to track down where the problem is and when it's slow the DNS part of my request is taking over 5 seconds. Like I said it's not all the time. Sometimes it resolves and loads the page within milliseconds. The same page one click will be super fast and then the next time it takes over 5 seconds. It's really slowing me down and I am not sure what is causing it.

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• MQ window to Unix special chars

  - by user171523

  I am using .net client to post mesages to MQ server which is hosted on Unix. It is added some control character before the messages. Like below ^CD The Queue connection is through SSL Table channel connection. The code i am using is MQQueueManager queueManager = new MQQueueManager ; int openOptions = MQC.MQOO_OUTPUT + MQC.MQOO_BIND_NOT_FIXED + MQC.MQOO_FAIL_IF_QUIESCING; MQQueue Queue = queueManager.AccessQueue("TestQueue", openOptions); MQMessage queueMessage = new MQMessage(); queueMessage.WriteUTF(""); MQPutMessageOptions MessageOptions = new MQPutMessageOptions(); Queue.Put(queueMessage, MessageOptions); please let me know what cause this special chars

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• Catch database exception in Kohana

  - by danilo

  I'm using Kohana 2. I would like to catch a database exception to prevent an error page when no connection to the server can be established. The error displayed is system/libraries/drivers/Database/Mysql.php [61]: mysql_connect() [function.mysql-connect]: Lost connection to MySQL server at 'reading initial communication packet', system error: 110 The database server is not reachable at all at this point. I'm doing this from a model. I tried both public function __construct() { // load database library into $this->db try { parent::__construct(); } catch (Exception $e) { die('Database error occured'); } } as well as try { $hoststatus = $this->db->query('SELECT x FROM y WHERE z;'); } catch (Exception $e) { die('Database error occured'); } ...but none of them seemed to work. It seems as if no exception gets passed on from the main model. Is there another way to catch the database error and use my own error handling?

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• Copied App.config to (Assembly).exe.config but from folder debug application doesn't run

  - by uugan

  Gives error: "The specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider, or not valid" App.config looks like and it's same as (Assembly.exe.config) config file for output: <?xml version="1.0" encoding="utf-8"?> <configuration> <connectionStrings> <add name="Entities1" connectionString="metadata=res://*/;provider=System.Data.SqlClient;provider connection string='data source=localhost;initial catalog=DatabaseName;integrated security=True;multipleactiveresultsets=True;App=EntityFramework'" providerName="System.Data.EntityClient" /> </connectionStrings> </configuration> How to run exe with it's configuration file? I tried to change '' to quot but nothing has changed.

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• how to access remote registry access between xp and vista using vb.net?

  - by meenakshi

  I have to access remote connection from XP os to Vista os in vb.net How to do that?

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• How do i enable transactions

  - by acidzombie24

  I have a similar question of how to check if you are in a transaction. Instead of checking how do i allow nested transactions? I am using Microsoft SQL File Database with ADO.NET. I seen examples using tsql and examples starting transactions using begin and using transaction names. When calling connection.BeginTransaction i call another function pass in the same connection and it calls BeginTransaction again which gives me the exception SqlConnection does not support parallel transactions. It appears many microsoft variants allow this but i cant figure out how to do it with my .mdf file. How do i allow nested transactions with a Microsoft SQL File Database using C# and ADO.NET?

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• How to improve wireless network speed?

  - by Toby

  I am running 10.04 LTS on a desktop PC with a Belkin G-Plus MIMO Wireless network card. Ever since running Ubuntu on the machine I have noticed fairly slow network speeds (about half the speed I get when running the same card through Windows) I did some research I found out that by and large wireless network cards aren't that well supported on most Linux distros. I was wondering though if there is anything I could be tweaking on the system that could help squeeze a little more out of the card? Here is some more information *-network:1 description: Wireless interface physical id: 2 logical name: wlan0 serial: 00:1c:df:24:5e:54 capabilities: ethernet physical wireless configuration: broadcast=yes ip=192.168.1.5 multicast=yes wireless=IEEE 802.11bg

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• Problem with MIB_IFTABLE & MIB_IFROW

  - by calvin

  Hello there, Im using MIB_IFTABLE & MIB_IFROW to get the no.of bytes transmitted & received. Everything looks fine, and values are correct in case of using WIFI alone. But when i use vpn connection over wifi these values are not correct for wifi adapter, interestingly i'm getting correct values for vpn adapter. And if i see status of any of these adapters(right click and see status), all these values given by windows are correct. here are my questions. 1) is there any other way of getting no.of bytes transferred over adapter? 2) is there a way to tell whether adapter is vpn or not? (as all vpn adapters are shows as Local Area Connection) 3) If you are connected to VPN, is there a possibility of bytes getting transferred through other than this vpn adapter?(forget about split tunneling, consider very simple case) i use vs2005, win7, Im new to these protocols, thanks for any help. -calvin

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• IDbTransaction Rollback Timeout

  - by Ben

  I am dealing with an interesting situation where I perform many database updates in a single transaction. If these updates fail for any reason, the transaction is rolled-back. IDbTransaction transaction try { transaction = connection.BeginTransaction(); // do lots of updates (where at least one fails) transaction.Commit(); } catch { transaction.Rollback(); // results in a timeout exception } finally { connection.Dispose(); } I believe the above code is generally considered the standard template for performing database updates within a transaction. The issue I am facing is that whilst transaction.Rollback() is being issued to SQL Server, it is also timing out on the client. Is there anyway of distinguishing between a timeout to issue the rollback command and a timeout on that command executing to completion? Thanks in advance, Ben

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• Problem with Qt::QueuedConnection, signal delivered after disconnect

  - by lutku

  Hi, I just discovered interesting behavior of queued connection in Qt 4.6: First queued connection is made: connect(someSender, SIGNAL(completed()), this, SLOT(handleCompletion()), Qt::QueuedConnection) Then someSender sends the signal: emit completed() Before receiving signal (as it is in queue), I disconnect from the signal: disconnect(someSender, SIGNAL(completed()), this, SLOT(handleCompletion()) Still, handleCompletion slot is invoked at next eventloop iteration. I can prevent this from happening by using someSender-blockSignals(true) at correct point, but it feels awful not to mention having some boolean flag to disable slot's functionality. Especially, I feel amazed that this behavior is not mentioned in Qt documentation (at least I haven't found). Finally the question: any sensible way to avoid this from happening?

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• What is the best way to bypass China firewall to allow SSH deploy@**.com

  - by Lap

  I am trying to bypass the china firewall and allow SSH deploy@**.com at the command console. This is because I need to test the games I wrote on apps.facebook.com/**. I tried VPN (both pptp and openvpn), but they aren't that great as connection speed slows down significantly. Since I am deploying the game in another site, my browser needs to download the game, which is super slow. What are ways of bypassing the firewall other than getting a VPN? I was thinking maybe have a computer outside China and using teamviewer to access...

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• What ports does Advantage Database Server need?

  - by asherber

  I have an application which uses ADS and I am attempting to deploy it in a Windows network environment with a rather restrictive firewall. I am having a problem configuring firewall ports appropriately. ADS lives on \server, and it's listening on port 1234. When \client tries to connect to \server\tables, I get Error 6420 (Discovery process failed). When \client tries to connect to \server:1234\tables, I get error 6097, bad IP address specified in the connection path. \server is pingable from \client, and I can telnet to \server:1234. If I try to connect from a client machine inside the firewall, either connection path works fine. It seems there must be something else I need to open in the firewall. Any ideas? Thanks, Aaron.

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• apt-fast for ubuntu 14.04?

  - by Jatin Kaushal

  I just upgraded to ubuntu 14.04 from ubuntu 12.04 (Which I loved) and now, I cant install apt-fast. My net connection is very slow and I want to download using apt-fast but whenever I add the apt-fast ppa and update and try to install it, It says package apt-fast not found How do I fix this? thank you. I really appreciate The effort made by askubuntu (Which includes you awesome people ;)) To help me. My problem has already been answered. Here is a screenshot of my software sources. The person who answered my question has apparently removed the comment that answered my question but here is the repository that helped me add apt-fast sudo add-apt-repository ppa:saiarcot895/myppa So if this helps I would like to upvote each and every person who helped me and I will accept one answer too, Just give me some time to test both of them ;) anyway thank you guys to help me. You are awesome :-) XD

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• Star-schema: Separate dimensions for clients and non-clients or shared dimension for attendants?

  - by celopes

  I'm new to modeling star schemas, fresh from reading the Data Warehouse Toolkit. I have a business process that has clients and non-clients calling into conference calls with some of our employees. My fact table, call it "Audience", will contain a measure of how long an attending person was connected to the call, and the cost per minute of this person's connection to the call. The grain is "individual connection to the conference call". Should I use my conformed Client dimension and create a non-client dimension (for the callers that are not yet clients) this way (omitting dimensions that are not part of this questions): Or would it be OK/better to have a non-conformed Attending dimension related to the conformed Client dimension in this manner: Or is there a better/standard mechanism to model business processes like this one?

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• sql exception when transferring project from usb to c:\

  - by jello

  I'm working on a C# windows program with Visual Studio 2008. Usually, I work from school, directly on my usb drive. But when I copy the folder on my hard drive at home, an sql exception is unhandled whenever I try to write to the database. it is unhandled at the conn.Open(); line. here's the exception unhandled Database 'L:\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' already exists. Choose a different database name. Cannot attach the file 'C:\Documents and Settings\Administrator\My Documents\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' as database 'PatientMonitoringDatabase'. it's weird, because my connection string says |DataDirectory|, so it should work on any drive... here's my connection string: string connStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\PatientMonitoringDatabase.mdf; " + "Initial Catalog=PatientMonitoringDatabase; " + "Integrated Security=True";

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• How to SET ARITHABORT ON for connections in Linq To SQL

  - by Laurence

  By default, the SQL connection option ARITHABORT is OFF for OLEDB connections, which I assume Linq To SQL is using. However I need it to be ON. The reason is that my DB contains some indexed views, and any insert/update/delete operations against tables that are part of an indexed view fail if the connection does not have ARITHABORT ON. Even selects against the indexed view itself fail if the WITH(NOEXPAND) hint is used (which you have to use in SQL Standard Edition to get the performance benefit of the indexed view). Is there somewhere in the data context I can specify I want this option ON? Or somewhere in code I can do it?? I have managed a clumsy workaround, but I don't like it .... I have to create a stored procedure for every select/insert/update/delete operation, and in this proc first run SET ARITHABORT ON, then exec another proc which contains the actual select/insert/update/delete. In other words the first proc is just a wrapper for the second. It doesn't work to just put SET ARITHABORT ON above the select/insert/update/delete code.

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• Are certification courses worth it?

  - by Bill Williams

  I'm planning on getting certification in Database Development for SQL Server (MSTC - 70-433). I'm a junior level report writer at a new job and the company is offering to pay the majority, if not all, of training course fees. The course is five days. I noticed that MS has a self-paced training kit (book) that I could use. I'm wondering if this would be a better option because it will allow me to go as quick as possible. I've also heard about video training sessions (Lynda.com) but they seem to go at slow pace. My questions are: What should I expect at a certification course? Is it hands-on training? Small classes with personal feedback or not? Would I be better off learning at my own pace using the training kit? (I'd rather this not turn into a certifications are pointless discussion..)

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• Simulating simultaneous entities

  - by Steven Jeuris

  Consider the need to simulate a set of entitities in an accurate way. All entities exist in an artificial timeline. Within 'steps' of this timeline, all entities can do certain operations. It is imperative that timed events, are handled accurately, and not in processing order. So simple threading isn't a proper simulation, nor is procedurally walking across all entities. Processing may be slow, accuracy is key here. I have some ideas how to implement this myself, but most likely something like this has been done before. Are there any frameworks available for these purposes? Is there any particular paradigm more suitable?

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• How do I read Unicode characters from an MS Access 2007 database through Java?

  - by Peter

  In Java, I have written a program that reads a UTF8 text file. The text file contains a SQL query of the SELECT kind. The program then executes the query on the Microsoft Access 2007 database and writes all fields of the first row to a UTF8 text file. The problem I have is when a row is returned that contains unicode characters, such as "?". These characters show up as "?" in the text file. I know that the text files are read and written correctly, because a dummy UTF8 character ("?") is read from the text file containing the SQL query and written to the text file containing the resulting row. The UTF8 character looks correct when the written text file is opened in Notepad, so the reading and writing of the text files are not part of the problem. This is how I connect to the database and how I execute the SQL query: ---- START CODE Connection c = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=C:/database.accdb;Pwd=temp"); ResultSet r = c.createStatement().executeQuery(sql); ---- END CODE I have tried making a charSet property to the Connection but it makes no difference: ---- START CODE Properties p = new Properties(); p.put("charSet", "utf-8"); p.put("lc_ctype", "utf-8"); p.put("encoding", "utf-8"); Connection c = DriverManager.getConnection("...", p); ---- END CODE Tried with "utf8"/"UTF8"/"UTF-8", no difference. If I enter "UTF-16" I get the following exception: "java.lang.IllegalArgumentException: Illegal replacement". Been searching around for hours with no results and now turn my hope to you. Please help! I also accept workaround suggestions. =) What I want to be able to do is to make a Unicode query (for example one that searches for posts that contain the "?" character) and to have results with Unicode characters receieved and saved correctly. Thank you!

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• Flash doesn't work any more on 10.04

  - by Béné

  I have a very strange problem with flash on my 10.04 system. (An update to 12.04 is not an option, because the system is just too old and slow.) After a recent update flash has just stopped working altogether. Youtube just shows a white square, vimeo a black one. After a 10.04 reinstall the problem stays the same. Not even chrome displays flash content, just a message that shockwave flash could not be loaded. 'ubuntu-restricted-extras' 'flashplugin-nonfree' and 'flashplugin-installer' are all installed in version 11.2.202.238ubuntu0.10.04.1.

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• I'm a CS student, and honestly I don't understand Knuth's books..

  - by Raymond Ho

  I stumbled this quote from Bill Gates: "You should definitely send me a resume if you can read the whole thing." He was talking about The Art of Programming books.. So I was pretty curious and want to read it all but honestly, I don't understand it at all.. I'm really not that highly intellectual being.. So this should be the reason why I can't understand it, but I am eager to learn.. I'm currently reading volume 1 about fundamental algo.. So is there any books out there that are friendly to novice/slow people like me? So I can build up myself and hopefully in the future I can read Knuth's book at ease..

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• Thread safety of Matlab engine API

  - by Jeremy

  I have discovered through trial and error that the MATLAB engine function is not completely thread safe. Does anyone know the rules? Discovered through trial and error: On Windows, the connection to MATLAB is via COM, so the COM Apartment threading rules apply. All calls must occur in the same thread, but multiple connections can occur in multiple threads as long as each connection is isolated. From the answers below, it seems that this is not the case on UNIX, where calls can be made from multiple threads as long as the calls are made serially.

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• Microsoft Access and Java JDBC-ODBC Error

  - by user1638362

  Trying to insert some values in a Microsoft access database using java. I can an error however, java.sql.SQLException: [Microsoft][ODBC Driver Manager] The specified DSN contains an architecture mismatch between the Driver and Application Exception in thread "main" java.lang.NullPointerException To create the data source im using SysWoW64 odbcad32 and adding it the datasource to system DNS. I say this as i have seen else where there are problems which occur with 64bit systems. However it still doesn't work for me. Microsoft Office 32bit. import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class RMIAuctionHouseJDBC { /** * @param args */ public static void main(String[] args) { String theItem = "Car"; String theClient="KHAN"; String theMessage="1001"; Connection conn =null; // Create connection object try{ Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); System.out.println("Driver Found"); } catch(Exception e) { System.out.println("Driver Not Found"); System.err.println(e); } // connecting to database try{ String database ="jdbc:odbc:Driver={Microsoft Access Driver (*.accdb)};DBQ=AuctionHouseDatabase.accdb;"; conn = DriverManager.getConnection(database,"",""); System.out.println("Conn Found"); } catch(SQLException se) { System.out.println("Conn Not Found"); System.err.println(se); } // Create select statement and execute it try{ /*String insertSQL = "INSERT INTO AuctionHouse VALUES ( " +"'" +theItem+"', " +"'" +theClient+"', " +"'" +theMessage+"')"; */ Statement stmt = conn.createStatement(); String insertSQL = "Insert into AuctionHouse VALUES ('Item','Name','Price')"; stmt.executeUpdate(insertSQL); // Retrieve the results conn.close(); } catch(SQLException se) { System.out.println("SqlStatment Not Found"); System.err.println(se); } } } java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified at sun.jdbc.odbc.JdbcOdbc.createSQLException(Unknown Source) at sun.jdbc.odbc.JdbcOdbc.standardError(Unknown Source) at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(Unknown Source) at sun.jdbc.odbc.JdbcOdbcConnection.initialize(Unknown Source)

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• Is my form password being passed in clear text?

  - by liinkas

  This is what my browser sent, when logging into some site: POST http://www.some.site/login.php HTTP/1.0 User-Agent: Opera/8.26 (X2000; Linux i686; Z; en) Host: www.some.site Accept: text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1 Accept-Language: en-US,en;q=0.9 Accept-Charset: iso-8859-1, utf-8, utf-16, *;q=0.1 Accept-Encoding: deflate, gzip, x-gzip, identity, *;q=0 Referer: http://www.some.site/ Proxy-Connection: close Content-Length: 123 Content-Type: application/x-www-form-urlencoded lots_of_stuff=here&e2ad811=my_login_name&e327696=my_password&lots_of_stuff=here Can I state that anyone can sniff my login name and password for that site? Maybe just on my LAN? If so (even only on LAN ) then I'm shocked. I thought using <input type="password"> did something more than make all characters look like ' * ' p.s. If it matters I played with netcat (on linux) and made connection browser <= netcat (loged here) <= proxy <= remote_site

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• How to get interest in programming especially in java and android [closed]

  - by aditi

  I am new in this community. I just completed my Btech in Computer science, I have interest towards programming especially java. I started studying java but i am little bit slow in logic and understanding the concepts. I have some good books of java but when doing the program i am losing my confidence because of the logic issues. I have some doubts How can i improve my logical and coding skills HOw to get more and more interest in programming (like i heard about some programmers who are geeks, i mean programming machines). Is there any shortcut for studying programming Please provide some suggestions as i knew this forum has lots of good programmers. Please share ur thoughts and how you people improving ur logics. Any help is appreciated

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