An Internal Error Occurred During Parsing Heap Dump From
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An Internal Error Occurred During Parsing Heap Dump From Mat
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An Internal Error Occurred During Java Heap Space
helping each other. Join them; it only takes a minute: Sign up Eclipse Memory Analyser,but always shows An internal error occurred? up vote 20 down vote favorite 5 java.lang.OutOfMemoryError: Java heap space Dumping heap to java_pid2584.hprof ... Heap dump file created [106948719 bytes in 4.213 secs] Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2760) at java.util.Arrays.copyOf(Arrays.java:2734)
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at java.util.ArrayList.ensureCapacity(ArrayList.java:167) at java.util.ArrayList.add(ArrayList.java:351) at Main.main(Main.java:15) But when i open head dump java_pid2584.hprof via Eclipse Memory Analyser,but there is always message: An internal error occurred during: "Parsing heap dump from **\java_pid6564.hprof'".Java heap space java eclipse memory share|improve this question edited Mar 22 '12 at 11:29 Michael Laffargue 7,13732457 asked Mar 22 '12 at 9:57 Gavin 101114 4 Did you try increasing the -Xmx parameter when launching Eclipse? –Michael Laffargue Mar 22 '12 at 10:02 If you "don't have enough RAM" even when specifying -Xmx then stackoverflow.com/questions/7254017/… has some ideas –rogerdpack Apr 1 '15 at 20:42 I laughed so hard when my efforts to analyze a memory error failed as the tools had not enough memory. Hilarious. –Doc Jun 15 at 20:46 add a comment| 8 Answers 8 active oldest votes up vote 39 down vote The problem is that Eclipse Memory Analyser does not have enough heap space to open the Heap dump file. You can solve the problem as follows: open the MemoryAnalyzer.ini file
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us an internal error has occurred. java heap space eclipse Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community
Eclipse Memory Analyzer Heap Space Mac
Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Eclipse parsing heap dump nullpointerexception MAT Parsing 11GB Heap dump - Out Of Memory. Unable to parse the heap dump - Help Needed up vote 2 down vote favorite I was trying to parse the 11GB heap dump using Eclipse MAT and I am getting the following http://stackoverflow.com/questions/9819905/eclipse-memory-analyser-but-always-shows-an-internal-error-occurred error An internal error occurred during: "Parsing heap dump" I think the MAT is unable to parse such a huge heap dump. I read some posts and increase the VM configurations to more than 80% of the dump size. Following are my vm configurations -vmargs -Xms8192m -Xmx10240m and I am still not able to load the dump. I tried with ParseHeapDump.bat with no changes ... Need help please .... eclipse eclipse-memory-analyzer share|improve this question asked Oct 16 '12 at 21:40 vgajjala 2117 1 I http://stackoverflow.com/questions/12923872/eclipse-mat-parsing-11gb-heap-dump-out-of-memory-unable-to-parse-the-heap-dum have more large heap dump, just create an ec2 instance to run mat in the vnc. In this case m1.xlarge or m3.2xlarge may be enough. –qrtt1 Jun 4 '13 at 15:26 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted Keep increasing Xmx till the JVM complains, then increase your swap file size, then increase Xmx again, etc. At that stage it will take ages because it will be using disk as RAM. share|improve this answer answered Oct 16 '12 at 22:10 artbristol 23.8k43967 After posting this question I tried with 12gb of heap and the dump processed but its taking very long to remove the unreachable objects. It started it since more than a day now and its still 34%. So my next question is how to speed up this process? –vgajjala Oct 18 '12 at 19:10 More RAM, is all. –artbristol Oct 18 '12 at 21:47 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged eclipse eclipse-memory-analyzer or ask your own question. asked 3 years ago viewed 4471 times active 3 years ago Related 5Memory Analyzer (MAT) plugin not opening heap prof in MAT
CommunityMarketplaceEventsPlanet EclipseNewsletterVideosParticipateReport a BugForumsMailing ListsWikiIRCHow to ContributeWorking GroupsAutomotiveInternet of ThingsLocationTechLong-Term SupportPolarSysScienceOpenMDM Toggle navigation Bugzilla – Bug337421 NullPointerException during parsing of heap dump Last modified: https://bugs.eclipse.org/bugs/show_bug.cgi?id=337421 2016-07-14 02:27:07 EDT Home | New | Browse | Search | [?] | Reports | Requests | Help | Log http://www.jeroenreijn.com/2010/10/large-heap-dump-analysis-with-eclipse.html In [x] | Forgot Password Login: [x] | Terms of Use | Copyright Agent First Last Prev Next an internal This bug is not in your last search results. Bug337421 - NullPointerException during parsing of heap dump Summary: NullPointerException during parsing of heap dump Status: NEW Product: MAT Classification: Tools Component: Core Version: 1.0 Hardware: PC Windows XP Importance: P3 an internal error normal with 1 vote (vote) TargetMilestone: --- Assigned To: Project Inbox QA Contact: URL: Whiteboard: Keywords: Depends on: Blocks: Show dependency tree Reported: 2011-02-17 07:18 EST by Lubor Vágenknecht Modified: 2016-07-14 02:27 EDT (History) CC List: 6 users (show) andrew_johnson krum.tsvetkov sourabh2k6 tmccord11 wjgerritsen wxie See Also: Attachments Dump that generates a NullPointerException while parsing (13.86 MB, application/octet-stream) 2016-02-02 06:53 EST, WJ Gerritsen no flags Details View All Add an attachment (proposed patch, testcase, etc.) Note You need to log in before you can comment on or make changes to this bug. Description Lubor Vágenknecht 2011-02-17 07:18:32 EST An internal error occurred during parsing of heap dump: java.lang.NullPointerException at org.eclipse.mat.hprof.HprofParserHandlerImpl.beforePass2(HprofParserHandlerImpl.java:123) at org.eclipse.mat.hprof.HprofIndexBuilder.fill(HprofIndexBuilder.java:72) at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.parse(SnapshotFactoryImpl.java:203) at org.eclipse.mat.parser.internal.SnapshotFactoryImpl.openSnaps
application that they wrote. The garbage collector inside the JVM will remove most waste, but what happens when not all waste can be removed or something is wrong inside the application? This may result in an exception that probably a lot of developers and system administrators have seen before: java.lang.OutOfMemoryError (OOME).There are several causes for such an exception, but the most obvious is that there is memory leak somewhere in the application. The situation At one of my recent projects we were having some memory related issues on one of the production machines. The web application was running in Tomcat 6 and it appeared that at a certain point in time, the JVM tried to allocate twice the average memory it was using. Let’s say from 2 Gb the memory footprint went up to 4GB. You might have guessed it, because only a couple of minutes later we were represented with the OOME message in the server log. It turned out that this was related to the amount and type of requests being handled by the application server. I was glad to find out it was not a memory leak, but more a warning that the total size of requests could allocate a lot of memory. If your application is running, it’s hard to see what objects allocate memory. To get an insight on what the application was doing at the moment the OOME occurred, we configured the JVM to create a memory(heap) dump/snapshot at the moment that the OOME was thrown.
Generating a heap dump
Most of my clients run on the Sun(Oracle) JVM, so I will try to keep this post focussed on the instructions for the Sun JVM. In case your application server runs out of memory you can instruct the JVM to generate a heap dump when an OOME occurs. This heap dump will be generated in the HPROF binary format. You can do this in by:- Manually: by using ‘jmap’, which is available since JDK 1.5.
- Automatically by providing the following JVM command line parameter: -XX:+HeapDumpOnOutOfMemoryError
Analyzing the heap dump
Now you have the heap dump and want to figure out what was inside the heap at the moment the OOME occurred. There are several Java heap dump analyzers out there, where most of them can do more then just heap analysis. The products range from commercial to open source and these are the ones that I tried with my 4Gb .hprof file:- Yourkit
- jHat
- Eclipse Memory Analyzer (MAT)