I'm developping a javafx application which has much ui interfaces, and while opening many windows, the jvm start consumming much memory (going up tp 350mb).
When it arrives to 360mb, the programs starts lagging and end up by being crashed (nothing works, screen blocks ...) and the console show a OutOfMemoryException with Java Heap Space error
I've 6gb of memory in my computer, and tried to start the .jar file using -Xmx param, but still the operating system doesn't allow the jvm to consume more memory.
Is there anything else i should specify so that the jvm may be able to get as much memory as it needs ?
You might want to ensure that you're using:
java -Xmx1024m -jar YourApplication.jar
and not:
java -jar YourApplication.jar -Xmx1024m
Anything after the .jar is considered as argument passed to your executable Jar.
I am trying to run the vFileServe of project anarchy, but i always have this error even though i set a parameter on my java
Here is my error
Loading deploy parameters from Source\Vision\Samples\Engine\FileServe\FileServe_
android_arm_vs2010_anarchy.vcxproj_Dev.deploy
Creating apkFile ../../../../../Bin/android_arm_vs2010_anarchy/Dev/libFileServe.
apk for library ../../../../../Bin/android_arm_vs2010_anarchy/Dev/libFileServe.s
o
Android platform (SDK) android-10
Removing dir AndroidTemp\armeabi-v7a
Making a raw (so uncompressed) dir for the gdb server, native .so etc...
Done
Generating classes.dex file
Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Command finished with error code '1'
Here is my java parameter
I tried putting -XX:MaxHeapSize=256m -Xmx512m also but doesnt work either
Whats wrong here? Thanks
I don't know about this particular software but limiting JVM heap size to 512Mb max may be insufficient.
Try setting initial heap size to 512 Mb and maximum to 2 Gb with -Xms512m -Xmx2g
Fo some reason the environment variable of java has been removed. I have to set it again. That solve the problem
I'm running a WEKA classifier (J48 with an input .arff file composed of 3 fields, field 1 has ~27k distinct attributes, field 2 ~ 500k values) in a latest generation Macbook Pro with 8GB RAM.
I increased the java heap space to the maximum possible using the -Xmx parameter:
java -Xmx7G -cp weka-3-6-10/weka.jar weka.classifiers.trees.J48 -t
myfiles/loc_linear.arff -i
however when I run the classifier (after about 10 minutes) I get the error "Exception in thread "main" java.lang.OutOfMemoryError: Java heap space".
Evidently 8GB RAM is not enough with my input file. Does this mean the only solution to this is having a more powerful hardware (e.g. 16GB RAM or a very powerful server/cluster)?
Would there be any workaround to this issue? (e.g. reducing the input file? If so, which would be in your opinion the criteria to apply in the reduction?). Any other ideas or suggestions?
If you are running the Weka GUI on a Mac OS X machine, you can edit a plist configuration file. I followed instructions from the Weka mailing list.
cd into /Applications/weka-XXX.app/Contents , or wherever your weka executable was installed.
There will be a file called Info.plist there. I suggest you save a copy of that file to another location, as you'll need to change it in the next step.
Open the weka-XXX.app/Contents/Info.plist (XML) file in your favorite text editor and look for a block that says "VMOptions". There should be a value that says "-Xmx256M" which specifies the memory. Change that value to something bigger, like "-Xmx1024M".
Start Weka.
From your cited line of code it seems you are running Weka from the simple command line interface. If that is the case, then the answer is the same as this [question] (Increase heap to avoid Out of Memory Error in WEKA.)
You can't increase the heap size from the command line interface. Instead I believe you should increase the heap size in the RunWeka.ini file as stated in Weka's instructions
Okay iv been working on a hand full of tool to help maintain a large number a of game servers hosted on a single computer. What i'm am doing is lunching a .bat file from a python script. That bat file sets the servers prams like max memory and things of that nature. I open and run the .bat file with the following function.
def StartServer(path,file):
if file not in MK.keys():
l = Popen(file, cwd=path)
MK[file]=l
stdout, stderr = l.communicate()
else:
MK[file].terminate()
this function is called in one of two ways the
1st way is to start the program.
thread.start_new_thread( StartServer, (path,File, ) )
2nd the close the program
StartServer(path,File)
StartServer see the reentry and terminates the specified program...
and this works great for programs that need very little ram, like a bat file such as
#echo Hello world.
#pause
however when trying to allocate more ram for a java program such as,
#ECHO OFF
SET BINDIR=%~dp0
CD /D "%BINDIR%"
"%ProgramFiles%\Java\jre7\bin\java.exe" -Xmx4096M -Xms4096M -jar Minecraft_RKit.jar user:password
PAUSE
I receive a memory error from the BAT file as follows. this is from the bat file not from the python side
Invalid mat heap size: -Xmx4096M
The specified size exceeds the maximum representable size.
Error: Could not create java virtual machine.
Error: A fatal exception has occurred. Program will exit.
Press any key to continue . . .
Note: I prefer to use both python and the bat file thank you in advance!
You are attempting to start a 32-bit JVM, giving it a heap size that is too large for a 32-bit architecture. The maximum heap size is something less than 3Gb for a 32-bit JVM. The actual limit depends on the OS (which determines how much of the address space is made available to applications) and on how much non-heap memory is used by the JVM.
Either reduce the max heap size, or switch to a 64-bit JVM (and a 64-bit OS).
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)
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
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
change the default -Xmx1024m to a larger size
Note that on OS X, to increase the memory allocated to MAT, you need to right-click mat.app and show the package contents. The MemoryAnalyzer.ini file is under /Contents/Eclipse.
Solution for same issue for Memory Analyzer plugin in Eclipse in MAC OS X El Capitan.
I was facing the same issue but with the eclipse plugin and I did not have any Memory Analyzer App in Applications Folder. The solution which worked for me was:
Right Click on Eclipse icon and select Show Package Content.
Go to Contents>Eclipse
Open Eclipse.ini
Change value -Xmx1024m to -Xmx2048m
Restart Eclipse
On OS X 11.5 (El Cap) modifying MemoryAnalyzer.app/Contents/MacOS/MemoryAnalyzer.ini does not work! This is because it's looking for the MemoryAnalyzer.ini in a different place.
On my computer, it was looking for:
MemoryAnalyzer.app/Contents/Eclipse/MemoryAnalyzer.ini but the real .ini file was:
MemoryAnalyzer.app/Contents/MacOS/MemoryAnalyzer.ini.
In order for your changes to take effect, copy the existing .ini file into the new location.
To find where MemoryAnalyzer is looking for the ini file, you can run:
sudo su
cd ...MemoryAnalyzer.app/Contents/MacOS/
dtruss ./MemoryAnalyzer 2>&1 | grep ini
If Memory Analyser is used from Eclipse, then edit your eclipse.ini file to increase the vm argument to -Xmx1024m or higher. This worked for me.
http://wiki.eclipse.org/index.php/MemoryAnalyzer/FAQ#Out_of_Memory_Error_while_Running_the_Memory_Analyzer
As suggested by others, its two step simple process:-
open the MemoryAnalyzer.ini file from your MAT installation directory.
change the default -Xmx1024m to a larger size for e.g. if you have to analyze a 4GB heap dump then you can replace -Xmx1024m with -Xmx5g or -Xmx6g
For more details refer:-
https://better-coding.com/solved-eclipse-mat-java-heap-space-error/
For my experience add in MemoryAnalyzer.ini, Xms and Xmx to the max as your materiel possibilities. G1GC is faster and -XX:-UseGCOverheadLimit is need because gc usage can be high and time consuming, and maybe -XX:+UseStringDeduplication is the key to consume less memory
-vmargs
-Xms8g
-Xmx8g
-XX:-UseGCOverheadLimit
-XX:+UseG1GC
-XX:+UseStringDeduplication
If you are using Mac, try running the executable inside the mat.app 'folder' with -data option, by which you can specify a writable path:
cd mat.app/Contents/MacOS
./MemoryAnalyzer -data <writable_path>
I tried all the solutions here as well, while still getting the same error and the reason eclipse was trying to open the .hprof file as a text file due to wrong or unknown file type / editor association.
Solution: Right click on the file, select open with, then select Others, and select Eclipse Memory Analyzer.
Worked with 700MB dump, and worked with 2G dump on an eclipse heap of about 600M.
An internal error has occurred. Java heap space
Ans: GO to Your Project Work space
open .setting folder
Delete all file of .setting folder.
after you can compile
now there is no error Like Heap space
Enjoy :)
You may reduce your application memory limit, and then again take a dump. Eclipse Memory Analyser puts dump file to memory - I suspect that your Eclipse has less memory than the limit of application.
You can also do the opposite and increase the memory limit for Eclipse, but if your application works on a server, it will be hard to match in size of memory.