exception-handling

问题 How do I do Exception handling in Spark - Scala for invalid records Here is my code: val rawData = sc.textFile(file) val rowRDD = rawData.map(line => Row.fromSeq(line.split(","))) val rowRDMapped = rowRDD.map { x => x.get(1), x.get(10) } val DF = rowRDMapped.toDF("ID", "name" ) Everything works fine if the input data is fine, If I dont have enough fields, I get ArrayIndexOutOfBoundException. I am trying to put try-catch around, but I am not able to skip the records with invalid data, via try

问题 I need to translate an exception emanating from a Task<T> in the same manner that doing the following would for normal synchronous code: try { client.Call(); } catch(FaultException ex) { if (ex.<Some check>) throw new Exception("translated"); } However, I want to do this asynchronously, i.e., Call above is actually Task CallAsync() . So in C# 5 my method would look like this: async Task CallAndTranslate() { try{ await client.CallAsync(); } catch(FaultException ex) { if (ex.FaultCode ...)

问题 For one thread, I catch the uncaught exception via below code segments. However, for ExecutorService executor = Executors.newFixedThreadPool(10); , how can I catch uncaught exception? Thread.UncaughtExceptionHandler h = new Thread.UncaughtExceptionHandler() { public void uncaughtException(Thread th, Throwable ex) { System.out.println("Uncaught exception: " + ex); } }; 回答1: You can use the overload of the method newFixedThreadPool , which accepts a ThreadFactory : Thread

问题 With the following code, I get the "Gotcha!" with python. try: x = 0 y = 3/x except Exception: # ZeroDivisionError print "Gotcha!" I think this is the equivalent C++ code, but it can't catch the exeption. #include <iostream> int main() { int x = 0; //float y = 3.0/x; int z = 0; try { z = 3 / x; } catch (std::exception) { std::cout << "Gotcha!"; } std::cout << z; } Floating point exception What went wrong? How can I catch this exception? 回答1: In C++, dividing by zero doesn't generate an

问题 How to make Eclipse to report error when declared exception is not caught? For example, if I declare method as public int someMethod(int a, int b) throws IllegalArgumentException { ... } And then use it in another method like public int anotherMethod() { ... return someMethod(a, b); } I want compiler to report error in anotherMethod, until I will catch IllegalArgumentException or declare another method as public int anotherMethod() throws IllegalArgumentException {} 回答1: Eclipse should

问题 I am trying to come up with a general (opinionated) way of handling exceptions in NodeJS that doesn't use try catch due to the performance hit. I also want to stay away from libraries like streamline that try to make async code look like sync code. It seems that Domains fit the bill well but I wanted to invite comments/ suggestions on the way I propose to use them. Are there significant problems with this approach? I plan to make the majority of my async functions follow the pattern of the

问题 I have a problem in catching the exceptions in my spring integration application. Flow of operations in my application. Http:inbound gateway which receives the request (error-channel defined to my custom error channel) Service Activator for basic validations (Exceptions which are thrown from here are handled by error-channel defined on the GW) splitter Aggregator Exceptions on my splitter or Aggregator are not handled by my error channel. why? Steps taken: I added a chain and included a

问题 I have a .NET application (service) that consists of C# and C++ code. "Crashes" (i.e. System.AccessViolationException and other Corrupted State Exceptions) in the C++ Code will be ("non-") handled correctly, they will directly lead to my AppDomain.CurrentDomain.UnhandledException handler (which logs) and then the application will terminate, writing a WER dump file if so configured (which it is). For this application, I have determined that System.NullReferenceException is always a bug,

问题 We want to know error handling mechanism in SWIFT for whole block of code. As, in swift, there are some techniques used for error handling, some of them are like using guard or if let . Also we can achieve it using do - catch statement. But we are getting stuck while handling error for whole bunch of code using single try-catch block as we were doing in Objective-C . In Objective-C this block was easily handling errors within any line of code in it. So we want to know this type of mechanism

问题 I am writing a very simple test case using selenium webdriver. Lets say I have @Test public void github_search() { this.webDriver.get("http://www.github.com"); WebElement findBox = this.webDriver.findElement(By.id("qa")); ...... } in this test, there is no element on the page with id of "qa", in this case I am excepting the findElement method to throw an exception. But it doesn't. Selenium actually appears to be stuck. Only thing I could do is manually close the browser. I was wondering how