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• java.io.FileNotFoundException for valid URL

  - by Alexei

  Hello. I use library rome.dev.java.net to fetch RSS. Code is URL feedUrl = new URL("http://planet.rubyonrails.ru/xml/rss"); SyndFeedInput input = new SyndFeedInput(); SyndFeed feed = input.build(new XmlReader(feedUrl)); You can check that http://planet.rubyonrails.ru/xml/rss is valid URL and the page is shown in browser. But I get exception from my application java.io.FileNotFoundException: http://planet.rubyonrails.ru/xml/rss at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1311) at com.sun.syndication.io.XmlReader.<init>(XmlReader.java:237) at com.sun.syndication.io.XmlReader.<init>(XmlReader.java:213) at rssdaemonapp.ValidatorThread.run(ValidatorThread.java:32) 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) I don't use any proxy. I get this exception on my PC and on the production server and only for this URL, other URLs are working.

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• can't create socket using IO::Socket

  - by Haiyuan Zhang

  when I run the following code, the execution is just hanging there, No response at all. does any of you can tell me what's wrong with the sample code? use strict; use warnings; use IO::Select; use IO::Socket; my $s = new IO::Socket ( LocalPort => 8889, Proto => 'tcp', Listen => 16, Reuse => 1 ); die "could not create socket $!\n" unless $s;

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• Lua not producing table of functions (IO API)

  - by ArtOfCode

  I'm working on a basic project in Lua. I've been trying to get data from files using the IO API (as defined here), but when I open a file and give it a handle, it doesn't seem to return a table of functions. The (erroneous bit of) code: local unread = fs.list("email/"..from.."/") local send = "" for _,file in ipairs(unread) do local handle = io.open(file,"r") local text = handle:read("*a") send = send .. text .. "\n" handle.close() fs.delete(file) end The fs you see on the first line is a professional filesystem wrapper round the IO API, not my work and perfectly error-free, so that's not the problem. However, when I try to read the file (handle:read()), it throws "attempt to index nil". Tracing it, it turns out that handle itself is nil. Any ideas?

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• rsync command deletion error "IO error encountered -- skipping file deletion"

  - by Jam88

  I use rsync command to take backup of files from one of my ubuntu server to another ubuntu machine. Backup server trigger a script that use rysnc command. Here is the command I use rsync -rltvh --partial --stats --exclude=.beagle/ --exclude=.* --delete-after root@live_server:/home/ /home/live_server_backup/home /tmp/logfile.log 2&1 live_server is ssh-able without password. So it works. Now problem is with --delete-after option After all file synced .At the end I can see deletion procedure skipped.logfile error is like IO error encountered -- skipping file deletion When i tried to find log there were some error while file sync rsync: send_files failed to open "/home/xyz/Desktop/PPT_session_1_context.pdf": Permission denied (13) So my understanding is as rsync could not read all the files from target for safety reason it is skipping the file deletion. Is there any way to make --delete-after work even if there is some permission error? I do not want to use force deletion as it will be dangerous in some situation.

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• rsync error unexplained error (code 255) at io.c

  - by kabeer

  I was using a script to perform rsync in sudo crontab. The script does a 2-way rsync (from serverA to serverB and reverse). After i reboot both the server machines, the rsync is not working in sudo crontab. I also setup a new cronjob and it fails, The error is: rsync error: unexplained error (code 255) at io.c(600) [sender=3.0.6] rsync: connection unexpectedly closed (0 bytes received so far) [receiver] However, when run from terminal, the rync script works as expected without issues. please help.

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• IIS and PHP restrict IO permissions

  - by ULTRA_POROV

  I have php installed trough a fastCGI module. Is there a way to restrict the module (php.exe) read / write permissions to only the directory (+ subdirs) of the IIS site that is calling it? I need this to prevent one IIS PHP site from having access to files outside its own directory. How to do this? Is there a setting in php.ini or in the IIS configuration? I believe such a feature could exist, because when a file on the server is requested the root path of the site is also known, all it would take is that IIS passes this path to the php module, and the php module should on its end allow only IO operations within this path. PS: I know it is possible to achieve this by using a different windows account for each website, this is not an option.

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• High IO latency on ESXi 4.1 on HP DL580 G7

  - by teddydestodes

  at my Company we were experiencing some weird spikes on IO latency on one of our ESXi instances. we've spend 24h figuring out whats wrong and no clue so far. after giving up we put all the disks into a different server (HP DL380 G7) with much less RAM and only one 6(HT) cores (from 12 on the DL 580) which run fine for about 2 hours. I dont know the specs for the DL380 but both servers have a Smart Array P410i with BBWC (the DL 580 has 1GB) Is it possible that one(or all) of the disks is failing without actually failing?

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• vSphere Promiscuous mode only receiving packets one way from network switch

  - by steve.lippert

  We have two network switches, a POE switch (SwitchA) to power our phones / users computers and a non-POE switch (SwitchB for the rest network.) Each switch is setup to do port mirroring to support our VoIP recording system. SwitchA does port mirroring on specific ports if we need to record a user. SwitchB mirrors one port to monitor our work at home users (Internet comes in from managed router, to switch, back out to our firewall.) These two port mirroring setups feed into one vmware vSphere 4.1 server, it has four total physical cards. The other two NICs feed into an unmanaged switch for connecting to the rest of the network. Once into the vSphere server all network ports go into a vSwitch, and then one of the servers (Windows 2008 R2) sniffs them out and does its thing. Everything is working fine and dandy from SwitchB. But on SwitchA we only receive one side of the VoIP packets (going out to the phone, nothing coming in from the phone). Troubleshooting steps I have taken so far: I hooked up my laptop to the monitor port on SwitchB and I see both sides of the packets. I swapped which network interface is plugged into the monitor port on SwitchA. Because everything feeds into one vSwitch / vNetwork and both sides of the conversation arrive just fine from SwitchB I believe everything is configured correctly on the vSphere server/guest. What could be causing one way packets to arrive on my guest machine from only one interface, but not the other? Could a bad cable be causing the problems from SwitchB?

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• java.io.EOFException while writing and reading froma servlet

  - by mithun1538

  Hello everyone, I have the following code on the applet side: URL servlet = new URL(appletCodeBase, "FormsServlet?form=requestRoom"); URLConnection con = servlet.openConnection(); con.setDoOutput(true); con.setDoInput(true); con.setUseCaches(false); con.setRequestProperty("Content-Type", "application/octet-stream"); ObjectOutputStream out = new ObjectOutputStream(con.getOutputStream()); out.writeObject(user);//user is an object of a serializable class out.flush(); out.close(); ObjectInputStream in = new ObjectInputStream(con.getInputStream()); status = (String)in.readObject(); in.close(); if("success".equals("status")) { JOptionPane.showMessageDialog(rootPane, "Request submitted successfully."); } else { JOptionPane.showMessageDialog(rootPane, "ERROR! Request cannot be made at this time"); } In the servlet side I recieve the code as follows: form = request.getParameter("form"); if("requestRoom".equals(form)) { String fullName, eID, reason; UserRequestingRoom user; try { in = new ObjectInputStream(request.getInputStream()); user = (UserRequestingRoom)in.readObject(); fullName = user.getFullName(); eID = user.getEID(); reason = user.getReason(); Class.forName("com.mysql.jdbc.Driver"); Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/chat_applet","root",""); PreparedStatement statement = con.prepareStatement("INSERT INTO REQCONFROOM VALUES(\"" + fullName + "\",\"" + eID + "\",\"" + reason + "\")"); statement.execute(); out = new ObjectOutputStream(response.getOutputStream()); out.writeObject("success"); out.flush(); } catch (Exception e) { e.printStackTrace(); out = new ObjectOutputStream(response.getOutputStream()); out.writeObject("fail"); out.flush(); } } When I click on the button that calls the code in the applet side, I get the following error: java.io.EOFException at java.io.ObjectInputStream$PeekInputStream.readFully(Unknown Source) at java.io.ObjectInputStream$BlockDataInputStream.readShort(Unknown Source) at java.io.ObjectInputStream.readStreamHeader(Unknown Source) at java.io.ObjectInputStream.<init>(Unknown Source) at com.org.RequestRoomForm.requestActionPerformed(RequestRoomForm.java:151) **//Line 151 is "ObjectInputStream in..." line in the applet code** at com.org.RequestRoomForm.access$000(RequestRoomForm.java:7) at com.org.RequestRoomForm$1.actionPerformed(RequestRoomForm.java:62) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Why am I getting this error? I have flushed when I output, I have closed the connections also, yet I get the error. Any reason for this?

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• Tab completion in adb shell

  - by djv

  The only thing I found is to cross compile bash. Is there another way to have tab completion in the Android shell?

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• How to enable tab completion from the terminal specific to the executable

  - by Synesso

  In bash, I believe it is possible to enable tab completion on the terminal for terms that are specific to the executable being invoked. For example, given an executable "eat" with valid arguments {cake, carrot, banana}, typing 'eat car' should complete to 'eat carrot'. I believe this is possible because I have seen it with 'ant' tab-completing its targets (though how this was set up I don't know). How can this behaviour be implemented?

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• Hide deprecated methods from tab completion

  - by Morgoth

  I would like to control which methods appear when a user uses tab-completion on a custom object in ipython - in particular, I want to hide functions that I have deprecated. I still want these methods to be callable, but I don't want users to see them and start using them if they are inspecting the object. Is this something that is possible?

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• Dealing with unwanted port numbers on localhost when debugging in Visual Studio

  - by Dan Bailiff

  So when I'm trying to debug a project in Visual Studio, I'll often have 1 or more services that I need to call. These services are separate projects and I'll launch them in separate instances of VS. ASP dev server kindly launches them with temporary port numbers attached. This would be fine except for my programs are looking for an IP without a port attached. (Typically it's as simple as "localhost"!) I've coped by using web config settings and changing the xml to use the port number while debugging. This still doesn't always work and occasionally I'll still have to fudge it and insert port numbers as strings in code! UGH! Then I have to remember to undo all the port herding code before deployment... I want to stop doing this: string _strBaseURL = String.Format("http://{0}:2277", ConfigurationManager.AppSettings["myservice_ip"].ToString()); What is the best practice here? Am I doomed to port herding while debugging VS apps?

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• Eclipse/Java code completion not working

  - by Rob

  I've downloaded, unzipped and setup Eclipse 3.4.2 with some plugins (noteable, EPIC, Clearcase, QuantumDB, MisterQ). Now I find when I'm editing Java projects the code completion is not working. If I type String. and press ctrl-space a popup shows "No Default Proposals" and the status bar at the bottom shows "No completions available". Any ideas? Thanks....

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• Is I/O Completion ports(Windows) or Asynchronous I/O (AIO) will improve performance of multithreaded

  - by Naga

  Hi, I want to use I/O Completion ports for Windows and Asynchronous I/O (AIO) for solaris and Linux versions of my server application. The application server is multithreaded and it can accept lot of concurrent TCP connections and can process many requests per conenction. Every request will be handled by seperate detached thread. Is this criteria well enough to use the latest AIO?. Is there any standardization using which one code can be used to all platforms. Thanks, Naga

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• Did test server port change in Rails 2.3?

  - by kareem

  I upgraded rails to 2.3.2 from 2.1.1 yesterday and a bunch of my tests started failing. When I was running under 2.1.1, the test server was running on port 3000 so I had a HOST_DOMAIN variable that included the port - HOST_DOMAIN = "localhost.tst:3000". This is so my assert_redirected_to's would succeed. Now, however, it seems that the test server is running on port 80, so the port in HOST_DOMAIN is causing tests to fail. There's no specific reason I'm keeping the port in HOST_DOMAIN. I more want to know whether something in Rails 2.3 changed the port the test server runs on and where I can read more about why. I've searched a ton and can't find anything, so I'm going to my go-to place to ask development questions :) Thanks in advance.

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• C, Linux: Receiving data from multiple multicast address on same port - how to distinguish them?

  - by Gigi

  2 vote down star I have an application that is receiving data from multiple multicast sources on the same port. I am able to receive the data. However, I am trying to account for statistics of each group (i.e. msgs received, bytes received) and all the data is getting mixed up. Does anyone know how to solved this problem? If I try to look at the sender's address, it is not the multicast address, but rather the IP of the sending machine. I am using the following socket options: struct ip_mreq mreq; mreq.imr_multiaddr.s_addr = inet_addr("224.1.2.3"); mreq.imr_interface.s_addr = INADDR_ANY; setsockopt(s, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)); and also: setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &reuse, sizeof(reuse)); I appreciate any help!!!

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• Uppercase code completion in Netbeans

  - by takeshin

  Can I configure Netbeans to autocomplete code when I type the capital letters? E.g. Z displays completion list starting with the letter Z, e.g. Zend_…, then I type vh, and the list is limited to this items, which have the capital letters Z, V, H in it, e.g. Zend_View_Helper_…. Does Netbeans support this bevaviour?

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• How to rebind another UDP socket port properly?

  - by Jollian

  When my client application launchs, it binds the UDP port like this: this.BindPort(5001); The BindPort method implement blow: public void BindPort(int port) { m_listener = new Socket( AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp ); IPEndPoint Point = new IPEndPoint( IPAddress.Any, Port ); m_listener.Bind( port); m_listener.BeginReceive( buff, 0, buff.Length, SocketFlags.None, new AsyncCallback( DataReceived ), buff ); } And when my server application commands client to bind to another UDP port(e.g. 5005). I call the same BindPort method in client. Then a exception occurs at DataReceived method. I think there must be a problem that I don't close the UDP port properly. But how can i close the UDP socket properly and rebind to another one. Thanks.

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• Emacs, C++ code completion for vectors

  - by Caglar Toklu

  Hi, I am new to Emacs, and I have the following code as a sample. I have installed GNU Emacs 23.1.1 (i386-mingw-nt6.1.7600), installed cedet-1.0pre7.tar.gz. , installed ELPA, and company. You can find my simple Emacs configuration at the bottom. The problem is, when I type q[0] in main() and press . (dot), I see the 37 members of the vector, not Person although first_name and last_name are expected. The completion works as expected in the function greet() but it has nothing to do with vector. My question is, how can I accomplish code completion for vector elements too? #include <iostream> #include <vector> using namespace std; class Person { public: string first_name; string last_name; }; void greet(Person a_person) { // a_person.first_name is completed as expected! cout << a_person.first_name << "|"; cout << a_person.last_name << endl; }; int main() { vector<Person> q(2); Person guy1; guy1.first_name = "foo"; guy1.last_name = "bar"; Person guy2; guy2.first_name = "stack"; guy2.last_name = "overflow"; q[0] = guy1; q[1] = guy2; greet(guy1); greet(guy2); // cout q[0]. I want to see first_name or last_name here! } My Emacs configuration: ;;; This was installed by package-install.el. ;;; This provides support for the package system and ;;; interfacing with ELPA, the package archive. ;;; Move this code earlier if you want to reference ;;; packages in your .emacs. (when (load (expand-file-name "~/.emacs.d/elpa/package.el")) (package-initialize)) (load-file "~/.emacs.d/cedet/common/cedet.el") (semantic-load-enable-excessive-code-helpers) (require 'semantic-ia) (global-srecode-minor-mode 1) (semantic-add-system-include "/gcc/include/c++/4.4.2" 'c++-mode) (semantic-add-system-include "/gcc/i386-pc-mingw32/include" 'c++-mode) (semantic-add-system-include "/gcc/include" 'c++-mode) (defun my-semantic-hook () (imenu-add-to-menubar "TAGS")) (add-hook 'semantic-init-hooks 'my-semantic-hook)

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• how to implement code completion in qt

  - by radi

  i am writing an ide using qt (on c++) and i need to add auto completion feature to it so i want to know : how to do that (i am using qtPlainTextEdit) ? what the data structure i should use ?

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• Bash completion symfony

  - by zimyand

  How can I make symfony completion in bash? Have ubuntu 9.10. It's hard to write own alias. Anyone know where can I find it? I find http://trac.symfony-project.org/wiki/BashCompletion - but it is for symfony 1.1. Is it compatible with 1.4 ?

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• How to tell which port a USB device is plugged into?

  - by Ted N

  My c# app must manage multiple USB devices which are the identical product from the same manufacturer. If the user plugs 3 of my devices in, and then unplugs one of them, I need to know which of the 3 devices was unplugged. However, when I register the devices and receive the WM_DEVICECHANGE notifications, the data returned from the DBT_DEVTYP_DEVICEINTERFACE is identical for each of the devices. If I could get the USB port info when the devices arrive or are removed it would solve my problem, but I can't find a way to do this. Any suggestions?

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• Python: Matching & Stripping port number from socket data

  - by tobywuk

  Hello, I have data coming in to a python server via a socket. Within this data is the string '<port>80</port>' or which ever port is being used. I wish to extract the port number into a variable. The data coming in is not XML, I just used the tag approach to identifying data for future XML use if needed. I do not wish to use an XML python library, but simply use something like regexp and strings. What would you recommend is the best way to match and strip this data? I am currently using this code with no luck: p = re.compile('<port>\w</port>') m = p.search(data) print m Thank you :)

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• How I can fix this code to allow my AVR to talk over serial port?

  - by samoz

  Hi guys, I've been pulling my hair out lately trying to get an ATmega162 on my STK200 to talk to my computer over RS232. I checked and made sure that the STK200 contains a MAX202CPE chip. I've configured the chip to use its internal 8MHz clock and divided it by 8. I've tried to copy the code out of the data sheet (and made changes where the compiler complained), but to no avail. My code is below, could someone please help me fix the problems that I'm having? I've confirmed that my serial port works on other devices and is not faulty. Thanks! #include <avr/io.h> #include <avr/iom162.h> #define BAUDRATE 4800 void USART_Init(unsigned int baud) { UBRR0H = (unsigned char)(baud >> 8); UBRR0L = (unsigned char)baud; UCSR0B = (1 << RXEN0) | (1 << TXEN0); UCSR0C = (1 << URSEL0) | (1 << USBS0) | (3 << UCSZ00); } void USART_Transmit(unsigned char data) { while(!(UCSR0A & (1 << UDRE0))); UDR0 = data; } unsigned char USART_Receive() { while(!(UCSR0A & (1 << RXC0))); return UDR0; } int main() { USART_Init(BAUDRATE); unsigned char data; // all are 1, all as output DDRB = 0xFF; while(1) { data = USART_Receive(); PORTB = data; USART_Transmit(data); } }

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