ioexception

问题 I did a little research about new java socket NIO. I am using MINA for building a simulated server which accept connection from many clients(about 1000) and process the data received from them. I also set up the client simulator which creates around 300 client connection and send data to server using thread. And the result is some of the connection is aborted by the server. Code is below try { listener = new NioSocketAcceptor(ioThread); listener.getFilterChain().addLast("codec", new

问题 I've tried to create remote MySql connection via ssh tunnel forwardedport. The sshClient connection OK. ForwardedPort starts OK. When I try to connect with MysqlConnection it throws System.Net.IO.IOException with the message "The handshake failed due to an unexpected packet format" The port is OK 100% sure because other native app(eg HeidiSQL) can connect if i create this port with my app. PrivateKeyFile file = new PrivateKeyFile(rsaFile); client = new SshClient(host, port, username, file);

问题 This question already has answers here : how to throw an IOException? (7 answers) Closed 6 years ago . Code: catch (IOException e) { LOGGER.error("IOException exception happened"); //now need throw again the same exception to be //catched in the upper method } But when I try simply: catch (IOException e) { LOGGER.error("IOException exception happened"); //now need throw again the same exception to be //catched in the upper method throw e; } Eclipse supposes to me put "throw e" in try catch

问题 I am attempting to load a font, in slick2d, which (in eclipse) is located at: "resources\fonts\slkscr.ttf" with the following code: private void loadResources() { try { Font fontRaw = Font.createFont(Font.TRUETYPE_FONT, new BufferedInputStream(Game.class.getClassLoader(). getResourceAsStream("resources/fonts/slkscr.ttf"))); Font fontBase = fontRaw.deriveFont(Font.PLAIN, 20); this.font = new TrueTypeFont(fontBase, false); } catch (IOException e) { e.printStackTrace(); } catch

问题 i'm having some problems with custom classes in giraph. I made a VertexInput and Output format, but i always getting the following error: java.io.IOException: ensureRemaining: Only * bytes remaining, trying to read * with different values where the "*" are placed. This was tested on a Single Node Cluster. This problem happen when a vertexIterator do next(), and there aren't any more vertex left. This iterator it's invocated from a flush method, but i don't understand, basically, why the "next

问题 The Apache HttpClient docs for the execute(HttpHost target, HttpRequest request) method says: IOException - in case of a problem or the connection was aborted If I catch the IOException, will this catch ALL Server 5xx Errors? try { response = client.execute(httpHost, request); } catch (IOException e) { // throw custom Exception } finally { // close response and client } The reason I'm asking is that after this logic somewhere else down the line we're doing something like the following: if

问题 I'm trying to use RemoveDrive.exe, found here, in my Java application. I have it in my JAR, and I'm extracting it to a temporary file using the following code, however when I try to run it I get an IOException which says CreateProcess error=5, Access is denied . The program doesn't normally need admin priviledges though. Any ideas on what could be causing the issue? File RDexe = File.createTempFile("rmvd", ".exe"); InputStream exesrc = (InputStream) GraphicUI.class.getResource("RemoveDrive

问题 I get a "Permission denied" error, when I want to create a file on my external SD-Card (named /storage/B9BE-18A6). I know that you have to ask for the write permission programmatically since Android M. So I inserted the solution from Arpit Patel (Android 6.0 Marshmallow. Cannot write to SD Card) I don't know why I still haven't the permissions to do it. Do you guys have another solution that I can create files on my SD-Card? Code for creating the file FloatingActionButton fab_new_file =

问题 I wrote an Android app that uses the transceive() function to communicate with an NFC-V card. My problem is that line byte[] response = nfcv.transceive(command) always throws a tag lost exception. Could someone help me? String action = intent.getAction(); Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG); NfcV nfcv = NfcV.get(tag); if(nfcv != null) { Toast.makeText(this, "nfcv detected", Toast.LENGTH_LONG).show(); } try { nfcv.connect(); Toast.makeText(this, "connected", Toast.LENGTH

问题 I had a similar code as in this question. Extending the code, in accepted answer, worked for me too. Before this time, I used this type of codes and never meet any exception. Now, my questions are: Why should I use the USER AGENT? Why it became necessary to use in my program? Is it necessary to use in every program? If yes, how my program ran so good before? If no, why I have to handle this now? How the string "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)" is generated? (I want to know