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  • C# Thread-safe Extension Method

    - by Wonko the Sane
    Hello All, I may be waaaay off, or else really close. Either way, I'm currently SOL. :) I want to be able to use an extension method to set properties on a class, but that class may (or may not) be updated on a non-UI thread, and derives from a class the enforces updates to be on the UI thread (which implements INotifyPropertyChanged, etc). I have a class defined something like this: public class ClassToUpdate : UIObservableItem { private readonly Dispatcher mDispatcher = Dispatcher.CurrentDispatcher; private Boolean mPropertyToUpdate = false; public ClassToUpdate() : base() { } public Dispatcher Dispatcher { get { return mDispatcher; } } public Boolean PropertyToUpdate { get { return mPropertyToUpdate; } set { SetValue("PropertyToUpdate", ref mPropertyToUpdate, value; } } } I have an extension method class defined something like this: static class ExtensionMethods { public static IEnumerable<T> SetMyProperty<T>(this IEnumerable<T> sourceList, Boolean newValue) { ClassToUpdate firstClass = sourceList.FirstOrDefault() as ClassToUpdate; if (firstClass.Dispatcher.Thread.ManagedThreadId != System.Threading.Thread.CurrentThread.ManagedThreadId) { // WHAT GOES HERE? } else { foreach (var classToUpdate in sourceList) { (classToUpdate as ClassToUpdate ).PropertyToUpdate = newValue; yield return classToUpdate; } } } } Obviously, I'm looking for the "WHAT GOES HERE" in the extension method. Thanks, wTs

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  • SQL Server Compact timed out waiting for a lock

    - by jankhana
    Hi all, I'm having an application in that i use Sql Compact 3.5 with VS2008. I'm running multiple threads in my application which contacts the compact database and accesses the row. It selects and deletes those rows in a fashion i.e selecting and giving to the application 5 rows and deleting those rows from the table. It works great with a single thread but if i use multiple threads i.e if 3 or more threads are running I get very often the TimeOut Error!!! I have increased the Time out property in the connection string but it didn't give me expected result. The error log is as follow: SQL Server Compact timed out waiting for a lock. The default lock time is 2000ms for devices and 5000ms for desktops. The default lock timeout can be increased in the connection string using the ssce: default lock timeout property. [ Session id = 5,Thread id = 4204,Process id = 4808,Table name = XXX,Conflict type = x lock (s blocks),Resource = TAB ] The Query that I use to retrieve is as follows: " select Top(5) * from TableName order by id; delete from TableName where id in(select top(5) id from TableName order by id); " Is there any way by which we can avoid this Time Out exception??????? The above query I un as a transaction in VS2008 one using SQLCECommand and the other using SqlCEDataAdapter. Any Idea!!!!!! Reply

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  • junit assert in thread throws exception

    - by antony.trupe
    What am I doing wrong that an exception is thrown instead of showing a failure, or should I not have assertions inside threads? @Test public void testComplex() throws InterruptedException { int loops = 10; for (int i = 0; i < loops; i++) { final int j = i; new Thread() { @Override public void run() { ApiProxy.setEnvironmentForCurrentThread(env);//ignore this new CounterFactory().getCounter("test").increment();//ignore this too int count2 = new CounterFactory().getCounter("test").getCount();//ignore assertEquals(j, count2);//here be exceptions thrown. this is line 75 } }.start(); } Thread.sleep(5 * 1000); assertEquals(loops, new CounterFactory().getCounter("test").getCount()); } StackTrace Exception in thread "Thread-26" junit.framework.AssertionFailedError: expected:<5> but was:<6> at junit.framework.Assert.fail(Assert.java:47) at junit.framework.Assert.failNotEquals(Assert.java:277) at junit.framework.Assert.assertEquals(Assert.java:64) at junit.framework.Assert.assertEquals(Assert.java:195) at junit.framework.Assert.assertEquals(Assert.java:201) at com.bitdual.server.dao.ShardedCounterTest$3.run(ShardedCounterTest.java:77)

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  • Getting force close when i add view to other view when a thread is running

    - by Praveena
    Hi, I am getting the below error 12-30 05:40:40.484: ERROR/AndroidRuntime(413): Uncaught handler: thread Thread-10 exiting due to uncaught exception 12-30 05:40:40.494: ERROR/AndroidRuntime(413): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.ViewRoot.checkThread(ViewRoot.java:2629) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.ViewRoot.requestLayout(ViewRoot.java:545) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.View.requestLayout(View.java:7657) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.View.requestLayout(View.java:7657) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.View.requestLayout(View.java:7657) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.View.requestLayout(View.java:7657) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.View.requestLayout(View.java:7657) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.ViewGroup.addView(ViewGroup.java:1749) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.ViewGroup.addView(ViewGroup.java:1708) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at android.view.ViewGroup.addView(ViewGroup.java:1688) 12-30 05:40:40.494: ERROR/AndroidRuntime(413): at com.wwwww.shout.presentationLayer.Shout$1.run(Shout.java:137) and my code is myProgressDialog = ProgressDialog.show(Shout.this,"","Loading...",true); new Thread() { public void run() { String xml; xml="<spGetUserMessages><SearchLocation></SearchLocation></spGetUserMessages>"; messages =parse.GetGetUserMessages(dataparsing.ILGetUserMessages(xml)); myProgressDialog.dismiss(); ((LinearLayout)findViewById(R.id.LinearlayoutMessage)).addView(iiii); } }.start(); at the time of adding views to the layout i am getting the above error.what is the wrong in this.Please give me some suggestions.Thanks in advance

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  • Thread to receive the messages from serial port is not working using c#

    - by karthik
    I am using Serial port to receive the messages. The below function is running in a thread. When i debug i find that the thread is running properly. But "if (sp.IsOpen)" is always false, due to which the code is not executing inside the IF condition at all. It says the Port is closed. I will be having multiple serial ports in my system and i will not know, which port will receive the message. So i need to listen to all the ports in one Thread. How can i solve my problem here ? private void ListenerPorts() { log.Info("Listening Thread Started"); while (true) { //foreach (SerialPort sp in storeport) foreach (SerialPort sp in comPortsList) { if (sp.IsOpen) { sp.ReadTimeout = readTimeoutInMs; sp.WriteTimeout = writeTimeoutInMs; try { string msg = sp.ReadLine(); this.GetMessageRichTextBox("Message : " + msg + "\n"); sp.WriteLine(sp.PortName); if (msg.Contains("COM")) { // is AutoScan receiverPortName = sp.ReadLine(); this.updateLblStatusRichTextBox(sp.PortName + " is connected to " + msg + "\n"); } else { //standalone is uppercase ReceiverPortName = sp.ReadLine(); this.updateLblStatusRichTextBox(sp.PortName + " is connected to " + ReceiverPortName + "\n"); } } catch (Exception ex) { // no data System.Diagnostics.Debug.WriteLine(sp.PortName + " : " + ex.Message); } } } } }

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  • Is Stream.Write thread-safe?

    - by Mike Spross
    I'm working on a client/server library for a legacy RPC implementation and was running into issues where the client would sometimes hang when waiting to a receive a response message to an RPC request message. It turns out the real problem was in my message framing code (I wasn't handling message boundaries correctly when reading data off the underlying NetworkStream), but it also made me suspicious of the code I was using to send data across the network, specifically in the case where the RPC server sends a large amount of data to a client as the result of a client RPC request. My send code uses a BinaryWriter to write a complete "message" to the underlying NetworkStream. The RPC protocol also implements a heartbeat algorithm, where the RPC server sends out PING messages every 15 seconds. The pings are sent out by a separate thread, so, at least in theory, a ping can be sent while the server is in the middle of streaming a large response back to a client. Suppose I have a Send method as follows, where stream is a NetworkStream: public void Send(Message message) { //Write the message to a temporary stream so we can send it all-at-once MemoryStream tempStream = new MemoryStream(); message.WriteToStream(tempStream); //Write the serialized message to the stream. //The BinaryWriter is a little redundant in this //simplified example, but here because //the production code uses it. byte[] data = tempStream.ToArray(); BinaryWriter bw = new BinaryWriter(stream); bw.Write(data, 0, data.Length); bw.Flush(); } So the question I have is, is the call to bw.Write (and by implication the call to the underlying Stream's Write method) atomic? That is, if a lengthy Write is still in progress on the sending thread, and the heartbeat thread kicks in and sends a PING message, will that thread block until the original Write call finishes, or do I have to add explicit synchronization to the Send method to prevent the two Send calls from clobbering the stream?

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  • cancelPreviousPerformRequestWithTarget is not canceling my previously delayed thread started with pe

    - by jmurphy
    Hello, I've launched a delayed thread using performSelector but the user still has the ability to hit the back button on the current view causing dealloc to be called. When this happens my thread still seems to be called which causes my app to crash because the properties that thread is trying to write to have been released. To solve this I am trying to call cancelPreviousPerformRequestsWithTarget to cancel the previous request but it doesn't seem to be working. Below are some code snippets. - (void) viewDidLoad { [self performSelector:@selector(myStopUpdatingLocation) withObject:nil afterDelay:6]; } (void)viewWillDisappear:(BOOL)animated { [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(myStopUpdatingLocation) object:nil]; } Am I doing something incorrect here? The method myStopUpdatingLocation is defined in the same class that I'm calling the perform requests. A little more background. The function that I'm trying to implement is to find a users location, search google for some locations around that location and display several annotations on the map. On viewDidLoad I start updating the location with CLLocationManager. I've build in a timeout after 6 seconds if I don't get my desired accuracy within the timeout and I'm using a performSelector to do this. What can happen is the user clicks the back button in the view and this thread will still execute even though all my properties have been released causing a crash. Thanks in advance! James

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  • different thread accessing MemoryStream

    - by Wayne
    There's a bit of code which writes data to a MemoryStream object directly into it's data buffer by calling GetBuffer(). It also uses and updates the Position and SetLength() properties appropriately. This code works purposes 99.9999% of the time. Literally. Only every so many 100,000's of iterations it will barf. The specific problem is that the memory.Position property suddenly returns zero instead of the appropriate value. However, code was added that checks for the 0 and throws an exception which include log of the MemoryStream properties like Position and Length in a separate method. Those return the correct value. Further addition shows that when this rare condition occurs, the memory.Position only has zero inside this particular method. Okay. Obviously, this must be a threading issue. But this code is well locked. However, the nature of this software is that it's organized by "tasks" with a scheduler and so any one of several actual O/S thread may run this code at any give time--but never more than one at a time. So it's my guess that ordinarily it so happens that the same thread keeps getting used for this method and then on a rare occasion a different thread get used. Then due to compiler optimizations, the different thread never gets the correct value. It gets a "stale" value. Ordinarily in a situation like this I would apply a "volatile" keyword to the variable in question. But that (those) variables are inside the MemoryStream object. Does anyone have any other idea? Or does this mean we have to implement our own MemoryStream object? (Just like we end up having to do with practically every collection in .NET?) It's a shame to have such an awesome platform as .NET and have virtually the entire system useless as-is for seriously parallelized applications. If I'm wrong or you have other ideas, please advise. Sincerely, Wayne

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  • Terminal-based snake game: input thread manipulates output

    - by enlightened
    I'm writing a snake game for the terminal, i.e. output via print. The following works just fine: while status[snake_monad] do print to_string draw canvas, compose_all([ frame, specs, snake_to_hash(snake[snake_monad]) ]) turn! snake_monad, get_dir move! snake_monad, specs sleep 0.25 end But I don't want the turn!ing to block, of course. So I put it into a new Thread and let it loop: Thread.new do loop do turn! snake_monad, get_dir end end while status[snake_monad] do ... # no turn! here ... end Which also works logically (the snake is turning), but the output is somehow interspersed with newlines. As soon as I kill the input thread (^C) it looks normal again. So why and how does the thread have any effect on my output? And how do I work around this issue? (I don't know much about threads, even less about them in ruby. Input and output concurrently on the same terminal make the matter worse, I guess...) Also (not really important): Wanting my program as pure as possible, would it be somewhat easily possible to get the input non-blockingly while passing everything around? Thank you!

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  • Thread mutex behaviour

    - by Alberteddu
    Hi there, I'm learning C. I'm writing an application with multiple threads; I know that when a variable is shared between two or more threads, it is better to lock/unlock using a mutex to avoid deadlock and inconsistency of variables. This is very clear when I want to change or view one variable. int i = 0; /** Global */ static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; /** Thread 1. */ pthread_mutex_lock(&mutex); i++; pthread_mutex_unlock(&mutex); /** Thread 2. */ pthread_mutex_lock(&mutex); i++; pthread_mutex_unlock(&mutex); This is correct, I think. The variable i, at the end of the executions, contains the integer 2. Anyway, there are some situations in which I don't know exactly where to put the two function calls. For example, suppose you have a function obtain(), which returns a global variable. I need to call that function from within the two threads. I have also two other threads that call the function set(), defined with a few arguments; this function will set the same global variable. The two functions are necessary when you need to do something before getting/setting the var. /** (0) */ /** Thread 1, or 2, or 3... */ if(obtain() == something) { if(obtain() == somethingElse) { // Do this, sometimes obtain() and sometimes set(random number) (1) } else { // Do that, just obtain(). (2) } } else { // Do this and do that (3) // If # of thread * 3 > 10, then set(3*10) For example. (4) } /** (5) */ Where I have to lock, and where I have to unlock? The situation can be, I think, even more complex. I will appreciate an exhaustive answer. Thank you in advance. —Alberto

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  • Creating Thread in Win32

    - by Dave18
    Does ThreadFunc() gets called two times here? sometimes I notice a single call and sometimes none at all. #include <windows.h> #include <stdio.h> DWORD WINAPI ThreadFunc(LPVOID); int main() { HANDLE hThread; DWORD threadld; hThread = CreateThread(NULL, 0, ThreadFunc, 0, 0, &threadld ); printf("Thread is running\n"); } DWORD WINAPI ThreadFunc(LPVOID p) { printf("In ThreadFunc\n"); return 0; } Output 1 Thread is running In ThreadFunc In ThreadFunc Press any key to continue . . . Output 2 Thread is running In ThreadFunc Press any key to continue . . . Output 3 Thread is running Press any key to continue . . .

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  • Strange thread behavior in Perl

    - by Zaid
    Tom Christiansen's example code (à la perlthrtut) is a recursive, threaded implementation of finding and printing all prime numbers between 3 and 1000. Below is a mildly adapted version of the script #!/usr/bin/perl # adapted from prime-pthread, courtesy of Tom Christiansen use strict; use warnings; use threads; use Thread::Queue; sub check_prime { my ($upstream,$cur_prime) = @_; my $child; my $downstream = Thread::Queue->new; while (my $num = $upstream->dequeue) { next unless ($num % $cur_prime); if ($child) { $downstream->enqueue($num); } else { $child = threads->create(\&check_prime, $downstream, $num); if ($child) { print "This is thread ",$child->tid,". Found prime: $num\n"; } else { warn "Sorry. Ran out of threads.\n"; last; } } } if ($child) { $downstream->enqueue(undef); $child->join; } } my $stream = Thread::Queue->new(3..shift,undef); check_prime($stream,2); When run on my machine (under ActiveState & Win32), the code was capable of spawning only 118 threads (last prime number found: 653) before terminating with a 'Sorry. Ran out of threads' warning. In trying to figure out why I was limited to the number of threads I could create, I replaced the use threads; line with use threads (stack_size => 1);. The resultant code happily dealt with churning out 2000+ threads. Can anyone explain this behavior?

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  • how to slove error when using thread?

    - by ChandreshKanetiya
    I have following error msg in console when using NSThread "Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now..." I have submit my sample code here - (void)viewDidLoad { appDeleg = (NewAshley_MedisonAppDelegate *)[[UIApplication sharedApplication] delegate]; [[self tblView1] setRowHeight:80.0]; [super viewDidLoad]; self.title = @"Under Ground"; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [NSThread detachNewThreadSelector:@selector(CallParser) toTarget:self withObject:nil]; } -(void)CallParser { Parsing *parsing = [[Parsing alloc] init]; [parsing DownloadAndParseUnderground]; [parsing release]; [self Update_View]; //[myIndicator stopAnimating]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; } here "DownloadAndParseUnderground" is the method of downloding data from the rss feed and -(void) Update_View{ [self.tblView1 reloadData]; } when Update_View method is called the tableView reload Data and in the cellForRowAtIndexPath create error and not display custom cell - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; CustomTableviewCell *cell = (CustomTableviewCell *) [tblView1 dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { [[NSBundle mainBundle] loadNibNamed:@"customCell" owner:self options:nil]; cell = objCustCell; objCustCell = nil; }

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  • Paypal Sandbox Do Direct Payment Internal Error 10001 Timeout Processing Request

    - by user552968
    This is what I'm sending to https://api-3t.sandbox.paypal.com/nvp: VERSION = 65.0 SIGNATURE = AFcWxV21C7fd0v3bYYYRCpSSRl31AxdW2pQp.tWHTjGNcHflR-LJhJ0t USER = seller_1283487740_biz_api1.gmail.com PWD = 1283487748 AMOUNT = 50.00 CREDITCARDTYPE = Visa ACCT = 4031477440127509 EXPDATE = 12/2015 CVV2 =123 IPADDRESS = 127.0.0.1 METHOD = DoDirectPayment I can GetBalance, I can produce other errors when I intentionally send something wrong, but DoDirectPayment or DoAuthorization returns this: TIMESTAMP = 2010-12-24T03:35:10Z CORRELATIONID = 2ca329fdbe3c0 ACK = Failure L_ERRORCODE0 = 10001 L_SHORTMESSAGE0 = Internal Error L_LONGMESSAGE0 = Timeout processing request

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  • Cannot get a connection, pool error Timeout waiting for idle object :sakai

    - by siddhant
    iam using sakai 2.9.1 after a few operations the server stops responding and prints log:- 2014-02-20 12:48:47,085 WARN http-bio-8080-exec-18 org.sakaiproject.db.impl.BasicSqlService - Sql.dbRead: sql: select SAKAI_SITE.SITE_ID,SAKAI_SITE.TITLE,SAKAI_SITE.TYPE,SAKAI_SITE.SHO RT_DESC,SAKAI_SITE.DESCRIPTION,SAKAI_SITE.ICON_URL,SAKAI_SITE.INFO_URL,SAKAI_SITE.SKIN,SAKAI_SITE.PUBLISHED,SAKAI_SITE.JOINABLE,SAKAI_SITE.PUBVIEW,SAKAI_SITE.JOIN_ROLE,SAKAI_SITE.IS_SPE CIAL,SAKAI_SITE.IS_USER,SAKAI_SITE.CREATEDBY,SAKAI_SITE.MODIFIEDBY,SAKAI_SITE.CREATEDON,SAKAI_SITE.MODIFIEDON,SAKAI_SITE.CUSTOM_PAGE_ORDERED,SAKAI_SITE.IS_SOFTLY_DELETED,SAKAI_SITE.SOFT LY_DELETED_DATE from SAKAI_SITE where ( SITE_ID = ? ) !admin org.apache.commons.dbcp.SQLNestedException: Cannot get a connection, pool error Timeout waiting for idle object at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:104) at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880) at org.sakaiproject.db.impl.BasicSqlService.borrowConnection(BasicSqlService.java:260) at org.sakaiproject.db.impl.BasicSqlService.dbRead(BasicSqlService.java:540) at org.sakaiproject.util.BaseDbFlatStorage.getResource(BaseDbFlatStorage.java:341) at org.sakaiproject.util.BaseDbFlatStorage.getResource(BaseDbFlatStorage.java:321) at org.sakaiproject.site.impl.DbSiteService$DbStorage.get(DbSiteService.java:236) at org.sakaiproject.site.impl.BaseSiteService.getDefinedSite(BaseSiteService.java:616) at org.sakaiproject.site.impl.BaseSiteService.getSite(BaseSiteService.java:702) at org.sakaiproject.site.impl.BaseSiteService.getSiteVisit(BaseSiteService.java:780) at org.sakaiproject.site.cover.SiteService.getSiteVisit(SiteService.java:140) at org.sakaiproject.presence.tool.PresenceTool.doGet(PresenceTool.java:141) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:634) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:369) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329) at org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:511) at org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1470) at org.sakaiproject.portal.charon.handlers.PresenceHandler.doPresence(PresenceHandler.java:140) at org.sakaiproject.portal.charon.handlers.PresenceHandler.doGet(PresenceHandler.java:70) at org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:881) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:695) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.util.NoSuchElementException: Timeout waiting for idle object at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1167) at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:96)

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  • Timeout Expired error Using LINQ

    - by Refracted Paladin
    I am going to sum up my problem first and then offer massive details and what I have already tried. Summary: I have an internal winform app that uses Linq 2 Sql to connect to a local SQL Express database. Each user has there own DB and the DB stay in sync through Merge Replication with a Central DB. All DB's are SQL 2005(sp2or3). We have been using this app for over 5 months now but recently our users are getting a Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. Detailed: The strange part is they get that in two differnt locations(2 differnt LINQ Methods) and only the first time they fire in a given time period(~5mins). One LINQ method is pulling all records that match a FK ID and then Manipulating them to form a Heirarchy View for a TreeView. The second is pulling all records that match a FK ID and dumping them into a DataGridView. The only things I can find in common with the 2 are that the first IS an IEnumerable and the second converts itself from IQueryable - IEnumerable - DataTable... I looked at the query's in Profiler and they 'seemed' normal. They are not very complicated querys. They are only pulling back 10 - 90 records, from one table. Any thoughts, suggestions, hints whatever would be greatly appreciated. I am at my wit's end on this.... public IList<CaseNoteTreeItem> GetTreeViewDataAsList(int personID) { var myContext = MatrixDataContext.Create(); var caseNotesTree = from cn in myContext.tblCaseNotes where cn.PersonID == personID orderby cn.ContactDate descending, cn.InsertDate descending select new CaseNoteTreeItem { CaseNoteID = cn.CaseNoteID, NoteContactDate = Convert.ToDateTime(cn.ContactDate). ToShortDateString(), ParentNoteID = cn.ParentNote, InsertUser = cn.InsertUser, ContactDetailsPreview = cn.ContactDetails.Substring(0, 75) }; return caseNotesTree.ToList<CaseNoteTreeItem>(); } AND THIS ONE public static DataTable GetAllCNotes(int personID) { using (var context = MatrixDataContext.Create()) { var caseNotes = from cn in context.tblCaseNotes where cn.PersonID == personID orderby cn.ContactDate select new { cn.ContactDate, cn.ContactDetails, cn.TimeSpentUnits, cn.IsCaseLog, cn.IsPreEnrollment, cn.PresentAtContact, cn.InsertDate, cn.InsertUser, cn.CaseNoteID, cn.ParentNote }; return caseNotes.ToList().CopyLinqToDataTable(); } }

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  • SQL server timeout 2000 from C# .NET

    - by Johnny Egeland
    I have run into a strange problem using SQL Server 2000 and two linked server. For two years now our solution has run without a hitch, but suddenly yesterday a query synchronizing data from one of the databases to the other started timing out. I connect to a server in the production network, which is linked to a server containing orders I need data from. The query contains a few joins, but basically this summarizes what is done: INSERT INTO ProductionDataCache (column1, column2, ...) SELECT tab1.column1, tab1.column2, tab2.column1, tab3.column1 ... FROM linkedserver.database.dbo.Table1 AS tab1 JOIN linkedserver.database.dbo.Table2 AS tab2 ON (...) JOIN linkedserver.database.dbo.Tabl32 AS tab3 ON (...) ... WHERE tab1.productionOrderId = @id ORDER BY ... Obviously my first attempt to fix the problem was to increase the timeout limit from the original 5 minutes. But when I arrived at 30 minutes and still got a timeout, I started to suspect something else was going on. A query just does not go from executing in less than 5 minutes to over 30 minutes over night. I outputted the SQL query (which was originally in the C# code) to my logs, and decided to execute the query in the Query Analyzer directly on the database server. To my big surprise, the query executed correctly in less than 10 seconds. So I isolated the SQL execution in a simple test program, and observed the same query time out both on the server originally running this solution AND when running it locally on the database server. Also I have tried to create a Stored Procedure and execute this from the program, but this also times out. Running it in Query Analyzer works fine in less than a few seconds. It seems that the problem only occurs when I execute this query from the C# program. Has anyone seen such behavior before, and found a solution for it? UPDATE: I have now used SQL Profiler on the server. The obvious difference is that when executing the query from the .NET program, it shows up in the log as "exec sp_executesql N'INSERT INTO ...'", but when executing from Query Analyzer it occurs as a normal query in the log. Further I tried to connect the SQL Query Analyzer using the same SQL user as the program, and this triggered the problem in Query Analyzer as well. So it seems the problem only occurs when connecting via TCP/IP using a sql user.

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  • Timeout expired in sql server problem

    - by Avinash
    set con2=server.CreateObject("ADODB.Connection") con2.ConnectionTimeout =1200 con2.open "Driver={SQL Server};server=111.111.111.11;user id=xx;pwd=xxx;Database=xxx" con2.execute("DELETE FROM tablename WHERE fieldid NOT IN(SELECT fieldid FROM tablename2)") con2.close set con2=nothing when i running this query using asp the following error occured. How to solve this issue? Microsoft OLE DB Provider for ODBC Drivers error '80040e31' [Microsoft][ODBC SQL Server Driver]Timeout expired

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  • Using waitForCondition ( script,timeout ) in Selenium IDE

    - by Alessandro Vernet
    I recorded a script using the Selenium IDE extension for Firefox, and I would like to add the command waitForCondition. I see it takes two arguments: script and timeout. In Selenium IDE, I have 3 text fields for each command: the command name (I assume "waitForCondition"), the target, and the value. Where and how should I put the two arguments in this UI?

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  • Web request timeout in c#

    - by victor_foster
    I am trying to make a web service request call to a third part web site who's server is a little unreliable. Is there a way I can set a timeout on a request to this site? Something like this pseudo code: try for 1 minute { // Make web request here using (WebClient client new WebClient())...etc. } catch { }

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  • CDI timeout results in an NPE

    - by Brian Leathem
    Is there a way (in JSF 2) to catch a Conversation timeout and redirect a user to a new page? I'm getting nasty NullPointerExceptions when the conversation times out. I could redirect the user on all NPE's, but that seems like too big a net.

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  • How do I implement TimeOut in idarkstar?

    - by malik
    Hi, A little background on the question: I am developing a RedDwarf(http://reddwarfserver.org/) client on iphone, for the client/server communication I use idarkstar. I had to make minor modifications to make it work till now. So here's the question, if the server is taking to long to respond or the network is very slow, how do I add a timeout functionality to make sure it doesn't keep waiting on the server forever? appreciate any pointers.

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  • Interesting issue with ScriptManager timeout value happens only in win2k machines

    - by jg
    When I set the Asyncpostbacktimeout value to a large value like 3600000000, the scriptmanager throws a timeout exception (it throws the error almost immediately after user action which triggers ajax request, so it is not timing out because the server is not responding). If I reset this value to some sane number like 3600 or even 36000, it works fine. AJAx content is getting updated in the page. This weirdness happens only in windows 2000 machines and does not happen in XP machines Any thoughts ?

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  • Flex Action Script timeout issue

    - by user179056
    Hello, Our flex (flare) application keeps timing out when rendering large datasets. Is there anyway to prevent this? we have tried to increase the timeout in the Application tag and the compiler settings. Not mushc success. Any other thoughts? regards Sameer

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