Java Outofmemory Exception Error
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Out Of Memory Error In Java Permgen Space
answers I'm developing a program that would require huge amount of memory, and I want to catch when out-of-memory exception happens. I had heard this is not possible to do, but curious if there is any development on this end. java exception out-of-memory share|improve this question asked Nov 7 '09 at 6:37 jy. 208135 marked as duplicate by RAS, Uwe Plonus, Tushar Gupta, iCodez, Jeremy Aug 29 '13 at 15:20 This question has been asked before and already has an out of memory exception in java how to solve answer. If those answers do not fully address your question, please ask a new question. add a comment| 9 Answers 9 active oldest votes up vote 64 down vote accepted It's not an exception; it's an error: java.lang.OutOfMemoryError You can catch it as it descends from Throwable: try { // create lots of objects here and stash them somewhere } catch (OutOfMemoryError E) { // release some (all) of the above objects } However, unless you're doing some rather specific stuff (allocating tons of things within a specific code section, for example) you likely won't be able to catch it as you won't know where it's going to be thrown from. share|improve this answer edited Nov 7 '09 at 6:51 answered Nov 7 '09 at 6:42 ChssPly76 71.5k14157169 12 Plus, there's likely no easy way for you to recover from it if you do catch it. –matt b Nov 7 '09 at 6:45 @matt b - in the specific case where you're able to catch it you're presumably trying to control your memory consumption and thus would be able to release some / all of it. But generally speaking you're right, of course. –ChssPly76 Nov 7 '09 at 6:48 @ChssPly76 (and others) - please read my answer to understand why trying to manage memory consumption by catching OOME's would be a BAD IDEA. –Stephen C Jul 10 '12 at 5:59 th
Method java.lang Class OutOfMemoryError java.lang.Object java.lang.Throwable java.lang.Error java.lang.VirtualMachineError
Define Java Messaging System
java.lang.OutOfMemoryError All Implemented Interfaces: Serializable public class OutOfMemoryError extends VirtualMachineError Thrown when the http://stackoverflow.com/questions/1692230/is-it-possible-to-catch-out-of-memory-exception-in-java Java Virtual Machine cannot allocate an object because it is out of memory, and no more memory could be made available by the garbage collector. OutOfMemoryError objects https://docs.oracle.com/javase/7/docs/api/java/lang/OutOfMemoryError.html may be constructed by the virtual machine as if suppression were disabled and/or the stack trace was not writable. Since: JDK1.0 See Also:Serialized Form Constructor Summary Constructors Constructor and Description OutOfMemoryError() Constructs an OutOfMemoryError with no detail message. OutOfMemoryError(Strings) Constructs an OutOfMemoryError with the specified detail message. Method Summary Methods inherited from classjava.lang.Throwable addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, https://plumbr.eu/outofmemoryerror/java-heap-space is causing it? Give me an example What is the solution? Permgen space What is causing it? Give me an example What is the solution? Metaspace What is causing it? Give me an http://crunchify.com/how-to-generate-out-of-memory-oom-in-java-programatically/ example What is the solution? Unable to create new native thread What is causing it? Give me an example What is the solution? Out of swap space? What is causing it? What out of is the solution? Requested array size exceeds VM limit What is causing it? Give me an example What is the solution? Kill process or sacrifice child What is causing it? Give me an example What is the solution? Download the whole handbook as a 28-page PDF or e-book java.lang.OutOfMemoryError: Java heap space Java applications are only allowed to use a limited amount of memory. This out of memory limit is specified during application startup. To make things more complex, Java memory is separated into two different regions. These regions are called Heap space and Permgen (for Permanent Generation): The size of those regions is set during the Java Virtual Machine (JVM) launch and can be customized by specifying JVM parameters -Xmx and -XX:MaxPermSize. If you do not explicitly set the sizes, platform-specific defaults will be used. The java.lang.OutOfMemoryError: Java heap space error will be triggered when the application attempts to add more data into the heap space area, but there is not enough room for it. Note that there might be plenty of physical memory available, but the java.lang.OutOfMemoryError: Java heap space error is thrown whenever the JVM reaches the heap size limit. What is causing it?There most common reason for the java.lang.OutOfMemoryError: Java heap space error is simple - you try to fit an XXL application into an S-sized Java heap space. That is - the application just requires more Java heap space than available to it to operate normally. Other causes for this OutOfMemoryError message are more complex and are caused by a programming error: Spikes in usage/data volume. The application was des
in One Webmaster Plugin Google Adsense Plugin Forums Advertise Contact Hire us We help customers create an effective online presence...Crunchify Core Java and J2EE Tutorials and Tips How to Generate Out Of Memory (OOM) in Java ProgramaticallyHow to Generate Out Of Memory (OOM) in Java Programatically Last Updated on 26 April, 2016 by App Shah 1 Comment Everyone in java development face java.lang.OutOfMemoryError now and then, OutOfMemoryError (OOM) in Java is one problem which is more due to system's limitation (memory) rather than due to programming mistakes in most cases though in certain cases you could have memory leak which causing OutOfMemoryError. Below is a simple java program which will consume more and more memory every loop and finally system will go OOM.. CrunchifyGenerateOOM.java Java 12345678910111213141516171819202122232425262728293031323334 package com.crunchify.tutorials;public class CrunchifyGenerateOOM { /** * @author Crunchify.com * @throws Exception * */ public static void main(String[] args) throws Exception { CrunchifyGenerateOOM memoryTest = new CrunchifyGenerateOOM(); memoryTest.generateOOM(); } public void generateOOM() throws Exception { int iteratorValue = 20; System.out.println("\n=================> OOM test started..\n"); for (int outerIterator = 1; outerIterator < 20; outerIterator++) { System.out.println("Iteration " + outerIterator + " Free Mem: " + Runtime.getRuntime().freeMemory()); int loop1 = 2; int[] memoryFillIntVar = new int[iteratorValue]; // feel memoryFillIntVar array in loop.. do { memoryFillIntVar[loop1] = 0; loop1--; } while (loop1 > 0); iteratorValue = iteratorValue * 5; System.out.println("\nRequired Memory for next loop: " + iteratorValue); Thread.sleep(1000); } }} Output: 123456789101112131415161718192021222324252627282930313233343536 =================> OOM test started..Iteration 1 Free Mem: 66731080Required Memory for next loop: 100Iteration 2 Free Mem: 66378392Required Memory for next loop: 500Iteration 3 Free Mem: 66378392Required Memory for next loop: 2500Iteration 4 Free Mem: 66378392Required Memory for next loop: 12500Iteration 5 Free Mem: 66378392Required Memory for next loop: 62500Iteration 6 Free Mem: 66378392Required Memory for next loop: 312500Iteration 7 Free Mem: 66378392Required Memory for next loop: 1562500Iteration 8 Free Mem: 65128376Required Memory for next loop: 7812500Iteration 9 Free Mem: 58878360Required Memory