exception

问题 I'm trying to understand what is going on with exceptions that are thrown within a task object and never handled. On MSDN it said that: If you do not wait on a task that propagates an exception, or access its Exception property, the exception is escalated according to the .NET exception policy when the task is garbage-collected. So I don't quite understand in what way those exceptions affect program flow. I thought that those exceptions should interrupt execution as soon as they are garbage

问题 We use Log4j (and Commons Logging) to log our error messages. Now we want to set up an additional log appender that outputs fatal errors to syslog, but without the exceptionally long Java stacktraces (those will still be available in the full log file). How would one configure this (using log4j.xml)? Is there a filter available to ignore the stack traces? 回答1: Edit after reading some more of the source: You still need to subclass PatternLayout, but the method you want to override is

问题 Something I've always been curious of public class FileDataValidator { private String[] lineData; public FileDataValidator(String[] lineData){ this.lineData = lineData; removeLeadingAndTrailingQuotes(); try { validateName(); validateAge(); validateTown(); } catch(InvalidFormatException e) { e.printStackTrace(); } } //validation methods below all throwing InvalidFormatException Is is not advisable to include the try/catch block within my Constructor? I know I could have the Constructor throw

问题 Something I've always been curious of public class FileDataValidator { private String[] lineData; public FileDataValidator(String[] lineData){ this.lineData = lineData; removeLeadingAndTrailingQuotes(); try { validateName(); validateAge(); validateTown(); } catch(InvalidFormatException e) { e.printStackTrace(); } } //validation methods below all throwing InvalidFormatException Is is not advisable to include the try/catch block within my Constructor? I know I could have the Constructor throw

问题 I want to embed python in my C++ application. I'm using Boost library - great tool. But i have one problem. If python function throws an exception, i want to catch it and print error in my application or get some detailed information like line number in python script that caused error. How can i do it? I can't find any functions to get detailed exception information in Python API or Boost. try { module=import("MyModule"); //this line will throw excetion if MyModule contains an error } catch (

问题 I've got this really strange request for an invalid URL on: Invalid URL: /cgi-bin/1st.cgi This is causing the following error: SEVERE: Exception initializing page context java.lang.IllegalStateException: Cannot create a session after the response has been committed at org.apache.catalina.connector.Request.doGetSession(Request.java:2381) at org.apache.catalina.connector.Request.getSession(Request.java:2098) at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:833) at

问题 I downloaded yesterday Android Studio 2.1.3 (before I worked with 1.5) and now I have this exception: java.lang.NoSuchMethodError: No static method setOnApplyWindowInsetsListener(Landroid/view/View;Landroid/support/v4/view/OnApplyWindowInsetsListener;)V in class Landroid/support/v4/view/ViewCompatLollipop; or its super classes (declaration of 'android.support.v4.view.ViewCompatLollipop' that stops my app on setContentView in the MainActivity. How can I solve this? 回答1: I had same issue. I

问题 I've started using C++ exceptions in a uniform manner, and now I'd like the compiler (g++) to check that there are no "exception leaks". The throw decoration should do this, like const does for constness of class methods. Well, it doesn't. Using throw is still documentary, but may even be dangerously misleading if others think a function cannot throw other exceptions than those listed in its documentation. Can g++ somehow be persuaded to be more strict on its throw-checking, i.e. really

问题 I've started using C++ exceptions in a uniform manner, and now I'd like the compiler (g++) to check that there are no "exception leaks". The throw decoration should do this, like const does for constness of class methods. Well, it doesn't. Using throw is still documentary, but may even be dangerously misleading if others think a function cannot throw other exceptions than those listed in its documentation. Can g++ somehow be persuaded to be more strict on its throw-checking, i.e. really

问题 I am getting the follow crash in my reports but I don't have a clue as to where to start looking! - any help appreciated. I have no calls or reference to UIKeyboardLayoutAlignmentView Fatal Exception: NSInternalInconsistencyException The layout constraints still need update after sending -updateConstraints to <_UIKeyboardLayoutAlignmentView: 0x14df2550; frame = (0 0; 0 0); userInteractionEnabled = NO; layer = <CALayer: 0x1603de90>>. _UIKeyboardLayoutAlignmentView or one of its superclasses