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Questions tagged [hprof]

A java heap/CPU profiling tool

142 questions
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jvisualvm: Stuck on “Loading Heap Dump...” screen

I am using jdk64 and my java version is "1.6.0_24". My tomcat is running with -Xmx7196m, and jvisualvm is running with -J-Xms2048m -J-Xmx3072m. I took a heap dump of my tomcat java process and size of my .hprof file is around 5.5 GB. When I try to…
Kuldeep Jain
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Android: Memory Analyzer eclipse plugin(1.1) doesn't launch automatically when pressing ddms "hprof dump"

The older version 1.0 used to work fine. However after updating to 1.1 it gives an option to save hprof file. How can I open that file in eclipse? Eclipse version is Helios 3.6.2
Saqib
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Extract JVM uptime from binary heap dump

I am analyzing several heap dumps and am interested in a way that I can get the JVM uptime (or start time) from the heap dump. Using eclipse memory analyzer I can easy get the System Properties and class path but can't find a way to find uptime.
turbanoff
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Where do references to Java Objects really exist？

Where do references to Java objects actually exist? (Such as for Garbage collection） Strong references are not recycled during garbage collection. The hprof file appears to record the connections between objects. Where do they exist in the JVM? I…
user9214779
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How do I extract a timestamp from the heap dump

Unfortunately, I forgot to record the time that I took the heap dump. I hope that somewhere in the heap, the standard library caches something like System.currentTimeMillis(). Unfortunately, I do not have any business objects that cache it. One…
joseph
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ERROR: expecting HPROF file format 1.0.3

I export heap dump as HPROF and I save it with the .hprof suffix according to docs. When I run hprof-conv command, error occurs: ERROR: expecting HPROF file format 1.0.3 As a result I get converted-heap.hprof file with 0 size. And Eclipse Memory…
Andrew
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Heap Dump w/ high memory allocation in Android Studio never finishes

We have an app that is jumping from 30-something MB of memory allocation to over 500MB while navigating between activities. I can track allocations while that happens, and see WHAT is being held in memory, but I want to create an HPROF file of the…
jkane001
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Android: Opening .hprof file In Eclipse

Im trying to check for memory leaks by using a HPROF File from eclipses DDMS view. I tried using MAT to read a .hprof saved to disk but got error: Error opening heap dump 'com.myapp.myapp.hprof'. Check the error log for further details. Error…
Eduardo
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Why doesn't the -baseline option of jhat work?

How come every object appears to be marked new, instead of just objects that are in the second snapshot but not in my baseline snapshot? Looking around online, I see some suggestions that I need to use hprof instead of jmap to make my memory dumps,…
skiphoppy
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heapdump size vs hprof size

I recently made a heapdump in a hprof format when my jboss server was running with a xms of 4096m and xmx of 4096m and a permsize of 512m. The hprof file generated is over 5gb. When I load the heapdump in visualvm, mat analyzer or yourkit, I only…
Michael
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hprof profiler output doesn't include line numbers regardless of `lineno` value

I'm running java -cp some:jars:out \ -agentlib:hprof=cpu=times,format=a,file=java.hprof.txt,lineno=y,doe=y com.foo.Benchmark \ < /dev/null and in the output I get stack frames without line numbers THREAD START (obj=50000150, id = 200002,…
Mike Samuel
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Android hprov-dump giving me Error: expecting 1.0.3

I've used the Dump HPROF File option in eclipses DDMS and made my hprof file called in.hprof, but when I try to do the hprov-conf in.hprof out.hprof from the command line it gives me the error "Error: expecting 1.0.3". Any ideas?
odiggity
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How to define tasks to run with hprof from sbt 0.10

How do I define "run" and "test:run" tasks to run with hprof on forked JVM. in build.sbt fork in run := true javaOptions in run += "-agentlib:hprof" This setting makes both run tasks work with hprof. I want to define my hprof task for keeping…
pokutuna
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Stack trace for thread causing an OOM

I have a java application which is getting an OutOfMemoryError, for heap space. I've enabled -XX:HeapDumpOnOutOfMemoryError, and have the resultant hprof file. The dump, however, shows that there is plenty of space left in the heap, permgen, etc. …
BeeOnRope
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why would an hprof file have a much smaller size than the amount of memory given to the jvm

Our code runs with -XX:+HeapDumpOnOutOfMemoryError flag so we get an hprof file on OOM. Recently I got such a file from an installation, I opened it with Eclipse memory analyzer (MAT) and I can see the total size is 46MB, how can it be if the…
Persimmonium
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