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• no more network connection Ubuntu 12.04 Server

  - by gerpol

  Since yesterday my 12.04 web server refuses to connect to the Internet. Also when I boot I'm seeing the "waiting for network config" message. After logging in I'm getting an error about the packages. Error text: E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise-updates_universe_i18n_Translation-en, E:The package lists or status file could not be parsed or opened. This is a production web server so I really could use some help with enabling the network connection again.

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• Display settings problems with Ubuntu 14.04 LTS

  - by DontUSASme

  For whatever reason (this was working correctly on Ubuntu 12.04 LTS) when I try to set my displays on top of each other in the settings, it won't allow to place them on top of each other. When I click "apply" I get the error message "Could Not Set Configuration Mode for CRTC 63." Can anybody help me with this? It wont let me set the two displays on top of each other, but it will allow me to place them side to side. Also, I get a random "Unknown display" as well. This was not existent in 12.04 LTS and I have no idea what it is, seeing as how the only screens that are in use, or plugged up for that matter, is my laptop's display (1366x768) and my Samsung TV display (1360x768) thru HDMI.

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• Lock file/content while being edited in browser. [migrated]

  - by codescope

  In one of my projects users are allowed to edit the same file. It is group work and max number of users in group is 4. It is rare that they will be editing at the same time but there is possibility of it. I am using ckeditor which displays the content. how I can lock the content while it is being edited? For the above case what will happen if one users open the content for editing and then never saves and leave window open. Is it possible to save the content, release the lock for editing by another users? If first user comes back to desk they should see the message that "content has been changed, please refresh". I am using php, mysql. Thanks

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• -ln links to wrong file

  - by user289075

  I've just installed matlab and want to be able to call it from the terminal. It works fine when I explicitly call it from its directory. I cd to /usr/local/bin and type sudo ln -s /usr/local/MATLAB/R2012a/bin/matlab matlab when I then type "matlab" in the terminal, I get the error message "bash: /media/OS/MATLAB/bin/matlab: No such file or directory" I have no idea why it's trying to call matlab from /media. I've tried deleting the file from usr/local/bin but when I create it again the same thing happens. Any help would be very much appreciated.

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• Suddenly Spotify doesn't work anymore

  - by user191781

  I've been using Spotify for 18 months without a problem. I use Ubuntu 12.04. Today Spotify stopped and doesn't start anymore. I only see a quick flash of the Spotify-startup-screen and thats it. I uninstalled using Synaptic and reinstalled using Synaptic. No solution. I uninstalled using Synaptic and reinstalled by terminal. No solution. I used Backup to set the system back two days. No solution. I see no error message and I ran out of options I know of.

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• Ubuntu 12.04 Nvidia GTX 460 video card installation

  - by aczietlow

  Currently testing Ubuntu 12.04 x64 for our development team. After upgrading from 11.10 I've been having video card issues. I'm using Nvidia GeForce GTX 460. When ever I try to launch Nvidia X server I get the following error message. You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run nvidia-xconfig as root), and restart the X server. I've tried running sudo nvidia-xconfig multiple times and rebooting with no success. I've also tried getting the nvidia-current driver from the x-swat repo sudo apt-add-repository ppa:ubuntu-x-swat/x-updates sudo apt-get update sudo apt-get install nvidia-current Followed again by a reboot did nothing for me but knock my resolution down to 800x600 Finally I've tried sudo apt-get purge xserver-xorg sudo apt-get update sudo apt-get install xserver-xorg xserver-xorg-video-all sudo reboot Does anyone have any thoughts or directions they could point me in? To the best of my understanding my video card is suppose to be supported.

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• when i load ubuntu i get the log on screen, but even with correct password i cant log on.. have looged in several times before successfully!

  - by mybox

  I have been using ubuntu 12.04 for a few months now. but have now come across a problem that i cant get past. I am stuck at the log on screen= i enter my password but i get a black screen flases up and the log on prompt reappears!!! tried using terminal prompts and i actually have loggin it- but not according to the main log onm screen. I cant get my desktop active as the log on prompt is there. when i put a wrong password in i get an invalid password message- with the correct password the log on screen just reappears!!!please help.

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• Web RDP not working in Ubuntu 11.10

  - by user77321

  I am not able to connect to the remote machine from Ubuntu 11.10 machine using Web RDP. The following are the details. Java Vendor: Oracle Corporation Java Version: 1.7.0_07 IVE Host: xxx.xxx.com Run Level:0, read timeout:90000 Applet is signed and trusted webRDP version: 1.0.8.16, 2011-04-14 10:34 Attempting to obtain the license from the application jar. Obtained the license from the application jar. Keyboard: IBM101 I have removed the actual host name from the above details The error message on a pop up window is Application Error UnsatisfiedLinkError Unable to load library 'libX11':liblibX11.so: cannot open shared object file: No such file or directory. This error happens soon after Applet loads. I am supposed to get a WebRDP Screen with logo then a Windows Login screen for the remote machine. ( This is working fine in Linux Mint) Anyone has experienced this problem? Any solutions?

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• Biztalk Schema generator in Visual Studio -- How to enable 'Well-Formed XML' ? [migrated]

  - by user28747

  I have installed Visual Studio 2010 and Biztalk. I create a new Biztalk-project in Visual STudio 2010. I choose 'Add new item' and then 'New generated schema'. Here I can choose 'Document type'. I choose 'Well-Formed XML (Not loaded)' and choose an input file. Now I get the message 'XFW to XSD schema generation module is not installed. Execute 'C:\Program files (X86)\Microsoft Biztalk Server 2010\SDK\Utilities\Schema Generator\InstallWFX.vbs to install the WFX to XSD schema generation module. I try to execute that file and some text hastily appear on the console. I restart Visual Studio 2010, but it still doesn't work. Apparently the execution of the shell script didn't work. I try to restart the computer, but it still doesn't work. Could anyone tell me what to do?

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• Build git on embedded system

  - by naive231

  I want to build git on our embedded system and I got git's source code from here. I run ./configure tool with following arguments: ./configure --build=arm-eabi --host=`uname -p`-`uname -s`-`uname -o` Configure tool runs, and returns an error says: checking whether system succeeds to read fopen'ed directory...configure: error: in`/home/git-1.8.0.2`. I set necessary environment variables like CC and CXX to our tool chain already, so ./configure complains nothing about compilers. But I have no idea about that error message. It looks like some permission problem, but I have full permission of /home/git-1.8.0.2 for sure. Any idea ?

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• What is wrong with me - bug problem? [closed]

  - by reizals

  I have about 6 years exp. in app. development. Not so long ago I had moved to another company and the problem has started. I ready don't know why the last time Im making so many bugs/mistakes. Of course Im testing the functionality before I send message that its "done", but I really don't know why I can't see trivial bugs. Some time it looks like I didnt test anything, but its not true. Ive always had this problems but now its pain in the a.s. My question is very simple, what happened to me ;)? Ok, joke aside. What do you do to avoid simple mistakes? plzzz don't tell me to use TDD. The project is... legacy and Im really sick and tired to fix it and adding more bugs into it. best regards

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• unable to clean intsall

  - by pkb

  I have downloaded an ISO file of UBANTU 12.10 x86 from the official website (www.ubantu.com). When I tried to install it everything was going good till I got the error message something like "the media you are using is probably currupt or you have an hard disk error . It did't told me what to do. I am already running WINDOW 7 ultimate in my pc and it is running fine i have tested my hard disk for error and no errors was found by "system mechanic pro 11" . after that i tried to install my WINDOW 7 on the same partition and it was successful . Even now I am unable to install UBANTU. It is my first experience with UBANTU so I don't know what to do. please guide me . my email is [email protected]

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• Partition Hard Drive For Data

  - by user211779

  Greetings ~ I am a new Linux/Ubuntu user. For various reasons (mostly my own ignorance) I am on my third install of Ubuntu 12.04. I want to partition the hard drive to create a drive for data and personal files in case I ever have to install again. I have been struggling all afternoon to make a gparted live USB. Tuxboot looked like the answer but I get an error message when using it. So, I am asking for help. Ultimately, I want to partition the hard drive for data and personal files. What do you recommend?

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• Mac HDD Is Encrypted

  - by user206844

  I have the hard drive from a PowerMac G5, which was my old computer before it died and I upgraded to Ubuntu Studio. The hard drive its self still works well, but on Ubuntu I can't access most of the files. I plugged it into my MacBook Air and changed some of the perms on some of the folders as a test. This worked for a few, but for others, I was getting the same message Cannot access folder. Access denied. I would like to use this as an external HDD (I have a case and everything), but it's kind of pointless if I can't access the folders that I want. After looking around for a couple of hours, I couldn't find anything that actually gave me an answer. I would like to know if: Anybody else has come upon this problem, If so, have you found a solution? and, What is it?

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• Secunia PSI 3.0 has just been released?

  - by TATWORTH

  I have been using Secunia 3.0 Beta for some time and recommend it to all PC users. It is free for personal use. I suggest you use to keep your PC software up to date. Here is the message they sent:We just wanted to let you know that Secunia has released the final versionof Secunia PSI 3.0, featuring a new and simplified interface, moreautomated updates, multiple languages (English, German, Spanish, Frenchand Danish), as well as a lot of other improvements that we hope you willlike. You can download the new version here (it is of course still available forfree):http://secunia.com/vulnerability_scanning/personal/And if you want a quick product tour see the PSI video on Youtube:https://www.youtube.com/watch?v=iUmaLmO0gx0&list=UU8EGaYoGIGlMAbfeJrS_0OQ&index=2&feature=plcp If interested you can also read the full press release here:http://secunia.com/company/blog_news/news/319/

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• SignalR - No connection could be made because the target machine actively refused it?

  - by user2151460

  Trying to create a Console application that is going to send data to a website. The website is built with Codeiginter framework, if that matters. When i'm running my Console application, i get the error that a connection could not be made, and that the machine refused it. Been watching some tutorials, but most of them are using Hubs etc, which imo i do not need for this simple task?. All i want to do is to send data to the website, one way. Here is my Console application using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Microsoft.AspNet.SignalR; using Microsoft.AspNet.SignalR.Client; namespace signalrDemo { class Program { static void Main(string[] args) { var connection = new Connection("http://localhost:3000/servers/2"); connection.Received += data => Console.WriteLine(data); connection.Start().ContinueWith(task => { if (task.IsFaulted) { Console.WriteLine("Failed to start: {0}", task.Exception.GetBaseException()); } else { Console.WriteLine("Success! Connected with client connection id {0}", connection.ConnectionId); } }); Console.ReadLine(); } } } And at my website, i have this code $(function () { var connection = $.connection('http://localhost/servers/2'); connection.received(function (data) { $("message").append(data + '<br />'); }); connection.start().done(); }); Thank you.

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• Update text in StatusBar in wpf using C#

  - by Archie

  hello, I have a TextBox in StatusBar in wpf which i want to update. I have a list of files in ListBox. On each file I would be doing some operation by calling say method ProcessFile(). So whenever the file processing is completed I want to show that file's name in the StatusBar text. I have tried something like this: private void button_Click(object sender, RoutedEventArgs e) { statusBar.Visibility = Visibility.Visible; DispatcherFrame frame = new DispatcherFrame(); Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(TimeConsumingMethod), frame); Dispatcher.PushFrame(frame); statusBar.Visibility = Visibility.Collapsed; } public object TimeConsumingMethod(Object arg) { ((DispatcherFrame)arg).Continue = false; foreach (string fileName in destinationFilesList.Items) { txtStatus.Text = fileName.ToString(); //Assume that each process takes some time to complete System.Threading.Thread.Sleep(1000); } return null; } But i can only see the last file's name in the StatusBar. Whats wrong with the code? Can somebody correct it? Thanks.

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• New HandleProcessCorruptedStateExceptions attribute in .Net 4

  - by Yaakov Davis

  I'm trying to crash my WPF application, and capture the exception using the above new .Net 4 attribute. I managed to manually crash my application by calling Environment.FailFast("crash");. (Also managed to crash it using Hans's code from here: http://stackoverflow.com/questions/2950130/how-to-simulate-a-corrupt-state-exception-in-net-4). The app calls the above crashing code when pressing on a button. Here are my exception handlers: protected override void OnStartup(StartupEventArgs e) { base.OnStartup(e); AppDomain.CurrentDomain.FirstChanceException += CurrentDomain_FirstChanceException; AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException; DispatcherUnhandledException += app_DispatcherUnhandledException; } [HandleProcessCorruptedStateExceptions] void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) { //log.. } [HandleProcessCorruptedStateExceptions] void CurrentDomain_FirstChanceException(object sender, System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs e) { //log.. } [HandleProcessCorruptedStateExceptions] void app_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e) { //log.. } The //log... comment shown above is just for illustration; there's real logging code there. When running in VS, an exception is thrown, but it doesn't 'bubble' up to those exception handler blocks. When running as standalone (w/o debugger attached), I don't get any log, despite what I expect. Does anyone has an idea why is it so, and how to make the handling code to be executed? Many thanks, Yaakov

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• How to implement progress bar and backgroundworker for database calls C#?

  - by go-goo-go

  How to implement progress bar and backgroundworker for database calls C#? I do have some methods that deal with large amounts of data. They do last a lot, so in my windows application, i wanna do something to tell users that the data are being processed. So i thought of using progress bar or status strip label, but since there is a single ui thread, the thread where the database-dealing methods are executed, ui controls are not updated, so progress bar or status strip label are useless to me. I've already seen some examples, but they deal with for-loops, ex: for(int i = 0; i < count; i++){ System.Threading.Thread.Sleep(70); // ... do analysis ... bgWorker.ReportProgress((100 * i) / count);} private void bgWorker_ProgressChanged(object sender, ProgressChangedEventArgs e){ progressBar.Value = Math.Min(e.ProgressPercentage, 100);} Can anybody give an example where I can use a method call, not a for-loop, and let the progress bar run while this method is executing??? thnx in advance, any help and hint is highly appreciated.

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• Why are my labels not updating in my update panel in ASP.NET?

  - by CowKingDeluxe

  I have a label in my update panel that I want to update its text on after a successful asynchronus file upload. Here's my markup: <asp:UpdatePanel ID="UpdatePanel1" runat="server"><ContentTemplate> Step 1 (<asp:Label ID="label_fileupload" runat="server" />): <br /> <ajaxToolkit:AsyncFileUpload ID="AsyncFileUpload1" Width="200px" runat="server" CompleteBackColor="Lime" UploaderStyle="Modern" ErrorBackColor="Red" ThrobberID="Throbber" UploadingBackColor="#66CCFF" OnClientUploadStarted="StartUpload" /> <asp:Label ID="Throbber" runat="server" Style="display: none"><img src="/images/indicator.gif" alt="loading" /></asp:Label> <br /> <asp:Label ID="statuslabel" runat="server" Text="Label"></asp:Label> </ContentTemplate></asp:UpdatePanel> Here is my code-behind: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If (IsPostBack) Then Else label_fileupload.Text = "Incomplete" label_fileupload.CssClass = "uploadincomplete" statuslabel.Text = "NOT DONE" End If End Sub Public Sub AsyncFileUpload1_UploadedComplete1(ByVal sender As Object, ByVal e As AjaxControlToolkit.AsyncFileUploadEventArgs) Handles AsyncFileUpload1.UploadedComplete System.Threading.Thread.Sleep(1000) If (AsyncFileUpload1.HasFile) Then Dim strPath As String = MapPath("/images/White.png") AsyncFileUpload1.SaveAs(strPath) End If label_fileupload.Text = "Complete" label_fileupload.CssClass = "uploadcomplete" statuslabel.Text = "DONE" End Sub When I set the labels to update via a button click, they work. But when I set them to update via the Upload complete event, they don't work. Is there some way around this to get the labels to update their text / css class from the UploadedComplete event of an asynchronous file upload control?

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• Logging in worker threads spawned from a pylons application does not seem to work

  - by TimM

  I have a pylons application where, under certain cirumstances I want to spawn multiple worker threads to process items in a queue. Right now we aren't making use of a ThreadPool (would be ideal, but we'll add that in later). The main problem is that the worker threads logging does not get written to the log files. When I run the code outside of the pylons application the logging works fine. So I think its something to do with the pylons log handler but not sure what. Here is a basic example of the code (trimmed down): import logging log = logging.getLogger(__name__) import sys from Queue import Queue from threading import Thread, activeCount def run(input, worker, args = None, simulteneousWorkerLimit = None): queue = Queue() threads = [] if args is not None: if len(args) > 0: args = list(args) args = [worker, queue] + args args = tuple(args) else: args = (worker, queue) # start threads for i in range(4): t = Thread(target = __thread, args = args) t.daemon = True t.start() threads.append(t) # add ThreadTermSignal inputData = list(input) inputData.extend([ThreadTermSignal] * 4) # put in the queue for data in inputData: queue.put(data) # block until all contents are downloaded queue.join() log.critical("** A log line that appears fine **") del queue for thread in threads: del thread del threads class ThreadTermSignal(object): pass def __thread(worker, queue, *args): try: while True: data = queue.get() if data is ThreadTermSignal: sys.exit() try: log.critical("** I don't appear when run under pylons **") finally: queue.task_done() except SystemExit: queue.task_done() pass Take note, that the log lin within the RUN method will show up in the log files, but the log line within the worker method (which is run in a spawned thread), does not appear. Any help would be appreciated. Thanks ** EDIT: I should mention that I tried passing in the "log" variable to the worker thread as well as redefining a new "log" variable within the thread and neither worked. ** EDIT: Adding the configuration used for the pylons application (which comes out of the INI file). So the snippet below is from the INI file. [loggers] keys = root [handlers] keys = wsgierrors [formatters] keys = generic [logger_root] level = WARNING handlers = wsgierrors [handler_console] class = StreamHandler args = (sys.stderr,) level = WARNING formatter = generic [handler_wsgierrors] class = pylons.log.WSGIErrorsHandler args = () level = WARNING format = generic

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• How set EnqueueCallBack to my generic callback

  - by CrazyJoe

  using System; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using Microsistec.Domain; using Microsistec.Client; using Microsoft.VisualStudio.TestTools.UnitTesting; using System.Collections.Generic; using Microsistec.Tools; using System.Json; using Microsistec.SystemConfig; using System.Threading; using Microsoft.Silverlight.Testing; namespace Test { [TestClass] public class SampleTest : SilverlightTest { [TestMethod, Asynchronous] public void login() { List<PostData> data = new List<PostData>(); data.Add(new PostData("email", "xxx")); data.Add(new PostData("password", MD5.GetHashString("xxx"))); WebClient.sendData(Config.DataServerURL + "/user/login", data, LoginCallBack); EnqueueCallback(?????????); EnqueueTestComplete(); } [Asynchronous] public void LoginCallBack(object sender, System.Net.UploadStringCompletedEventArgs e) { string json = Microsistec.Client.WebClient.ProcessResult(e); var result = JsonArray.Parse(json); Assert.Equals("1", result["value"].ToString()); TestComplete(); } } Im tring to set ???????? value but my callback is generic, it is setup on my WebClient .SendData, how i implement my EnqueueCallback to a my already functio LoginCallBack???

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• stoping doGet/dopost in java servlets ?

  - by bosso

  Hello everyone, I've been playing with Java Servlets and Ajax a bit, and I've got a situation on which I would really appreciate advice. Let's say I have HTML page with a start and stop buttons, and as a result of clicking start button, overridden doGet (or doPost) method on a servlet is invoked which computes something that takes a long time to complete. (e.g. a giant loop, or even Infinite loop, doesn't matter, I'm interested in concepts here). So, I'm asking you: 1.What would be my options to kill / shut down / halt / exit doGet method whan I hit stop button on a web page? Do I use threading here, or there is simpler way? I take it that using System exit is not a very good idea, right? ;) 2.So, let's say I implement code for stopping doGet method. What would happen If I hit start on one browser(e.g.IE), and while this long computation takes place open new tab or other browser(e.g.Firefox) and open same url and hit stop? Would that stop my original computation? Is there any easy way to avoid this? I know that questions are a bit off, as I'm just starting with server-side of things. :) Any suggestions would be greatly appreciated!

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• C# inaccurate timer?

  - by Ivan

  Hi there, I'm developing an application and I need to get the current date from a server (it differs from the machine's date). I receive the date from the server and with a simple Split I create a new DateTime: globalVars.fec = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, int.Parse(infoHour[0]), int.Parse(infoHour[1]), int.Parse(infoHour[2])); globalVars is a class and fec is a public static variable so that I can access it anywhere in the application (bad coding I know...). Now I need to have a timer checking if that date is equal to some dates I have stored in a List and if it is equal I just call a function. List<DateTime> fechas = new List<DateTime>(); Before having to obtain the date from a server I was using computer's date, so to check if the dates matched I was using this: private void timerDatesMatch_Tick(object sender, EventArgs e) { DateTime tick = DateTime.Now; foreach (DateTime dt in fechas) { if (dt == tick) { //blahblah } } } Now I have the date from the server so DateTime.Now can't be used here. Instead I have created a new timer with Interval=1000 and on tick I'm adding 1 second to globalVars.fec using: globalVars.fec = globalVars.fec.AddSeconds(1); But the clock isn't accurate and every 30 mins the clock loses about 30 seconds. Is there another way of doing what I'm trying to do? I've thought about using threading.timer instead but I need to have access to other threads and non-static functions. Thanks in advance, Ivan

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• Lucene.net create+lock errors in ASP.NET

  - by acidzombie24

  I have an issue with Lucene.net. It throws a lock exception. After poking around i notice these things. My code below works in an app bit when calling in Application_Start i get a NoSuchDirectoryException. Not closing the writer (as my code doesnt do below) i WILL get a LockObtainFailedException with the message Lock obtain timed out: SimpleFSLock@<FULL_PATH> from either app or asp.net These thread hinted when spawning threads they get less permissions then i do (but! my main thread has problems as well...) and one solution is to impersonate IIS. I am using visual studios 2010. I am not sure how full blown it is but my attempt to impersonate it failed. So my question is how do i have lucene create the directory and not throw an exception if dont close the writer for some reason (such as power going out)? http://stackoverflow.com/questions/2341163/why-is-my-lucene-index-getting-locked/2499285#2499285 http://stackoverflow.com/questions/1123517/lucene-net-and-i-o-threading-issue/1123981#1123981 static IndexWriter writer = null; static void lucene_init() { bool create = false; //I now use a full path. I still get NoSuchDirectoryException //string dirname = "LuceneIndex_z"; if (System.IO.Directory.Exists(dirname) == false) create = true; var directory = FSDirectory.GetDirectory(dirname); var analyzer = new StandardAnalyzer(); writer = new IndexWriter(directory, analyzer, create); }

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