Debug Outofmemory Error Java
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Java Heap Dump
file, or something else? –skaffman Dec 22 '10 at 18:03 A heapdump in phd format –Marcus Leon Dec 22 '10 at 18:05 add a comment| 7 Answers 7 active oldest votes up vote 3 down vote I've had success using a combination of Eclipse Memory Analyzer (MAT) and Java Visual VM to analyze heap dumps. MAT has some reports that you can run that give you a general idea of where to focus your efforts within your code. VisualVM has a better interface (in my opinion) for actually inspecting the contents of the various objects that you are interested in examining. It has a filter where you can have it display all instances of a particular class and see where they are referenced and what they reference themselves. It has been a while since I've used either tool for this they may have a closer feature set now. At the time using both worked well for me. share|improve this answer answered Dec 22 '10 at 18:55 laz 18.6k33544 These are the tools I use too. I prefer MAT because it needs much less memory to load big heap dumps than VisualVM, even if I have to agree that VisualVM interface is easier to use. –Guillaume Dec 22 '10 at 19:06 add a comment| up vote 2 down vote It is generally very difficult to debug OutOfMemoryError problems. I'd recommend using a profiling tool. JProfiler works pretty well. I've used it in the past and it can be very helpful, but I'm sure th
heap space OutOfMemoryError types Java heap space PermGen space Out of swap space unable to create new native thread Requested array size exceeds VM limit GC overhead
Usecompressedoops
limit exceeded How to debug different OutOfMemory errors Java heap space GC overhead eclipse memory analyzer limit exceeded Happens due to a memory leak. Heap dumps are automatically generated at 70/80/90/98% thresholds of the jhat heap size. file name looks like heapDump_MIVR_70%Threshold.hprof. When the application goes OOM, JVM generates a heap dump during the crash. file name looks like java_pid2665.hprof. Due to a bug CSCte90486, this http://stackoverflow.com/questions/4512147/how-to-debug-java-outofmemory-exceptions file can be collected only using remote account. Collect the heap dumps (present in the service log directory. i.e. MIVR directory for engine heap dumps). Collect the thread dump present in JVM.log file. Refer How to analyze heap dumps for the procedure to analyze a heap dump. PermGen space Happens most probably due to ClassLoader leak. When the application goes OOM, http://docwiki.cisco.com/wiki/How_to_debug_OutOfMemoryError JVM generates a heap dump during the crash. file name looks like java_pid2665.hprof. Due to a bug CSCte90486, this file can be collected only using remote account. Collect the heap dumps. Collect the thread dump present in the JVM.log file. Out of swap space Happens due to a memory leak in the JNI code, or in some native applications. System is low on memory. Collect the Perfmon counters of all the services running in the system. Plot a graph of memory usage and find which process is the culprit. unable to create new native thread Happens when OS runs out of system resources, or the application has run out of its address space due to excessive threads. Collect the thread dump present in the JVM.log file. Debug the perfmon logs to find the faulty application. Requested array size exceeds VM limit Happens due to an application bug or a memory leak. Debug application logs and heap dumps if present. Currently 4.00/512345 Rating: 4.0/5 (4 votes cast) Retrieved from "http://docwiki.cisco.com/wiki/How_to_debug_OutOfMemoryError" Views Page Leave a Comment View Source History Personal tools Log in Navigation
This Site Careers Other all forums Forum: Performance OutOfMemoryError : Suggestions for debugging Priyanka Dandekar Ranch Hand Posts: 52 posted 7 years ago I am trying to https://coderanch.com/t/427757/Performance/java/OutOfMemoryError-Suggestions-debugging debug an OutOfMemoryError we are getting on Web application which is based on Spring Web flow + Hibernate + c3p0 connection pool. I am using Jmeter to simulate the load https://www.mkyong.com/eclipse/eclipse-tomcat-java-lang-outofmemoryerror-java-heap-space/ of 5 concurrent users on this system and withing 5 minutes the applications runs out of memory with below message. java.lang.OutOfMemoryError: Java heap space Exception in thread "http-8080-3" java.lang.OutOfMemoryError: error java Java heap space The applications is not doing much processing so I assume so much memory is not required for it. I am using JProfiler to do application profiling, but I am kind of new to it so may be any suggestions on a good profiling tool are also welcome. Looking at the object allocations I see there are too debug outofmemory error many objects of java.util.concurrent.ConcurrentHashMap and its inner classes. See the attached image with JProfiler report. Let me know what could be the possible reason for this. I am open to any ideas you have. On Production we are running this application with 1.5GB JAva Heap space and it runs out of memory within 2-3 days. profiling.JPG JProfiler output snapshot for all objects Priya - Mockup Tool | Java | Struts2 | Lucene rajesh bala Ranch Hand Posts: 66 posted 7 years ago Can you post what is the heap size you used in your server? Definitely concurrenthashmap came up at top. But looking at the size it occupies, it doesn't seem to be a major issue. ~Rajesh.B Joe Ess Bartender Posts: 9321 10 I like... posted 7 years ago Here is an article on memory leaks, their causes and how to resolve them. [How To Ask Questions On JavaRanch] Priyanka Dandekar Ranch Hand Posts: 52 posted 7 years ago Thanks for your replies, I figured out the issue. There was a place w
App EngineApache AntApache MavenjQueryJava MongoDBQuartz SchedulerLog4jContact Us Eclipse + Tomcat - java.lang.OutOfMemoryError: Java heap spaceBy mkyong | March 11, 2014 | Viewed : 41,910 times +231 pv/wIn Eclipse IDE, run a Java web application with Tomcat server plugin, but the console prompts Exception in thread "x" java.lang.OutOfMemoryError: Java heap space 1. Solution - Increase Heap Size in TomcatBy default, Tomcat allocated a small amount of heap size. To solve it, you need to increase the Tomcat's heap size manually.1.1 In server view, double clicks on the Tomcat Server icon. 1.2 Clicks on the "Open launch configuration" link. 1.3 Clicks on the "Arguments" tab, and append the following VM options at the end of the VM arguments : -Xms