I am using Windows 7 32-bit OS. I am using Eclipse 3.7 (Indigo) 32 bit. I have jdk1.7.0_07 32-bit installed. And sometimes when I go to run Eclipse as administrator, I get the following error message,
And when I tap "OK", I get the following error message,
And sometimes I get this error message. And at other times, Eclipse will launch, but fail when Gradle goes to initialize its VM when attempting to start its daemon process.
What's happening? I realize it's a memory issue, but why am I able to launch Eclipse once in a while and run everything just fine? And at other times, why I am able to launch Eclipse but not able to run anything, or unable to launch Eclipse at all?
As a developer, this behavior is a nuisance.
Try -Xmx900m. The problem might be with the eclipse.ini file.
I've had this problem with JDK7. I've found that i do better with eclipse if it runs under Java 6, and then you add JDK7 as the runtime environment for your project.
Make sure that your eclipse matches your jre/jdk bitwise. If you are using 32-bit eclipse, you must use 32-bit jdk.
Your -vm param is wrong. The arg must start on the next line like this:
-vm
c:\Program Files\java... etc
When the JVM (Sun's JVM) starts it allocates the heap as a single malloc, a single contiguous block of memory. If, for any reason, that much contiguous memory is not available then the JVM will not start. Without debugging your machine is hard to know what could be blocking a big malloc. Note that some viruses recently have been taking shelter inside the jvm.
you said that your's is a 32 bit os is you your eclipse is 32 bit compatable or 64 bit if it is 64 bit remove the java related folder in your eclipse and replace it with 64 bith java sdk this will work i got this problem and i got it solved in this way.
Related
How can I specify that in order to run a certain java application that I created you need to have 32 bit JRE installed on your system? Further how can I specify that the java application is to use the 32 bit JRE and not the 64 bit JRE if they are both installed?
Background:
I have created an application that uses a 3rd party 32 bit only library. The application can not run in a 64 bit JRE.
I am going to be distributing this application to a lot of computers in my company, so I need to be able to in code or in the export process, specify the required JRE.
I am using eclipse, Kepler to develop and build the java application.
The idea of java is always compile once and run everywhere, regardless of OS, cpu architecture etc, so you might be heading the wrong direction here.
But nevertheless here are some system properties you might / not find helpful. I've listed the property key and value I have when I check it (I run Oracle JDK on Win7 64)
java.vm.name: Java HotSpot(TM) 64-Bit Server VM
sun.arch.data.model: 64
sun.cpu.isalist: amd64
To use any of those just do
String vmname = System.getProperty("java.vm.name");
You can't do it directly in Java, since you're in a running JVM at that point. My solution was to write a dos batch script to set the JAVA_HOME and add %JAVA_HOME%\bin at the front of the PATH. For example, I have sethome.bat which contains
#echo off
set "JAVA_HOME=c:\Program Files (x86)\Java\jre6"
set "PATH=%JAVA_HOME%\bin;%PATH%"
Then I use
call "%SERVICE_HOME%\sethome"
"%JAVA_HOME%\bin\java" -version
echo If this does not look correct press CTRL-C to cancel otherwise
pause
You cannot generally make sure what program runs your jar. I can pass the jar to acroread, or zip or whatever, and you can't do anything about it.
So, I'd just try to load the library, and do a proper error/exception handling. Who knows? Maybe your client has meanwhile replaced that library with a 64bit version, without you knowing about it? SO, this: loading, and if it won't aborting with a graceful eror message is the only sensible thing.
First of all, I have a box with 8gb of ram, so I doubt total memory is the issue.
This application is running fine on machines with 6gb or less.
I am trying to reserve 3GB of space using -Xmx3G under "VM Arguments" in Run Configurations in Eclipse.
Every time I try to reserve more than 1500mb, I get this error:
“Error occurred during initialization of VM; Could not reserve enough space for object heap” using -Xmx3G
What is going on here?
Could it be that you're using a 32-bit jvm on that machine?
Here is how to fix it:
Go to Start->Control Panel->System->Advanced(tab)->Environment Variables->System
Variables->New:
Variable name: _JAVA_OPTIONS
Variable value: -Xmx512M
Variable name: Path
Variable value: ;C:\Program Files\Java\jre6\bin;F:\JDK\bin;
Change this to your appropriate path.
This is actually not an Eclipse-specific issue; it's a general
Java-on-Windows issue. It's because of how the JVM allocates memory on
Windows; it insists on allocating a contiguous chunk of memory, which
often Windows can't provide, even if there are enough separate chunks to
satisfy the allocation request.
There are utilities that will try to help Windows "defrag" its memory,
which would, in theory, help this situation; but I've not really tried
them in earnest so can't speak to their effectiveness.
One thing that I've heard sometimes that might help is to reboot Windows
and, before starting any other apps, launch the Java app that needs the
big chunk of memory. If you're lucky, Windows won't have fragmented its
memory space yet and Java will get the contiguous block that is asks for.
Somewhere out on the interwebs there are more technical explanations and
analyses of this issue, but I don't have any references handy.
I did find this, though, which looks helpful: https://stackoverflow.com/a/497757/639520
First the JRE of 32bits can't use more ~1.5Gb of ram. So if you want more, use a 64bits JRE.
Second, When a new JVM starts, this sum the -Xmx property of the all JVM that are running, and check if there is enough memory left on the system to run at their own -Xmx, if is not enough then the error occurs.
I was using Liferay with Tomcat server from eclipse IDE.
I was stuck with this same error on click on server start up.
Double click on server from eclipse.
it open up Server Overview page. Updated memory arguments from -Xmx1024m -XX:MaxPermSize=256m to -Xmx512m -XX:MaxPermSize=256m.
Then it was working for me.
Make sure that Eclipse is actually running the same JVM you think it's running. If you use java in your web browser ever, you likely have a 32-bit version floating around too that might be taking precedence if it installed or updated lately.
To be absolutely sure, I recommend adding these two lines to your eclipse.ini file at the top:
-vm
C:/Java/jdk1.6.0_27/bin
...where on my machine C:/Java/jdk1.6.0_27/bin where the JVM I know is 64-bit is located. Be sure to have the bin folder there.
(As a bonus, on Windows 7, this also allows you to actually "pin the tab" which is why I had to do this for my own usage)
This is the issue of Heap size. Edit your .bat (Batch file). It might be showing Heap size 1024. Change it to 512 Then it should work.
Just put # symbol in front of org.gradle.jvmargs=-Xmx1536m in gradle.properties
# org.gradle.jvmargs=-Xmx1536m
I also had the same problem while using Eclipse which was 32 bit and the JVM used by it was 64 bit.
When I routed the Eclipse to 32 bit JVM then it worked
I know that i am a bit late, but here my answer comes:
I just installed the Java online Version from Oracle(not the offline 64-Bit one).
After having added the JAVA_HOME ENV variable, it just worked!
Hope I could help :)
Probably you are trying wrong options anyways.
I got a similar error with supporting error log:
Java HotSpot(TM) Client VM warning: ignoring option PermSize=32M; support was removed in 8.0
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=128M; support was removed in 8.0
Im my case, the software did not support java 8 yet(script was using old JVM arguments) but I had had java 8 by default.
One of the reason for this issue is no memory available for Tomcat to start. Try to delete the unwanted running software from windows and restart the eclipse and tomcat.
Solution is simple. No need to go deep into this issue.
If you are running on 64bit machine then follow below steps:
Unistall 32 bit java first (check in C:\Program Files (x86) for its existence)
Install the newer version JDK kit 64 bit (includes JRE)
Set the environment path (To avoid conflict error if you have two different 64bit JRE)
Check in command prompt by typing javac command.
Restart / Done
You can have two different Java installed but don't forgot to set path.
Please set JAVA_OPTS=-Xms256m -Xmx512m in environment variables, it should solve the issue, it worked for me.
Find out if you are using a 32bit version or 64bit version of Java. To know that use the command
java -version
The 3rd line of the output should give you if it 32bit or 64bit.
If it is 32bit uninstall and install a 64bit version.
I'm using eclipse on what I thought were all 64 bit runtime environments. The current settings Java>installed JREs and Execution Environment all point to jdk1.6.0_30 which is a 64 bit version of the JDK. However, eclipse still thinks it's running a 32 bit version because when I run:
System.getProperty("sun.arch.data.model");
it returns 32 instead of 64.
And the external JNI resource that I compiled for 64 bit machines will not link to the shared .so file unless it's running in a 64 bit enviroment. (I'm getting word size mismatch errors when I try to do this)
So How can I reconfigure eclipse to run 64 bit jvm. Does eclipse itself have to be a 64 bit version?
:on linux
Edit: I have tried everyone's suggestions and nothing is working. I've changed the execution, and enviroment variables to point to the newst JDK I have which is 1.6_30. when I run the program from a command line I get 64 and amd64 as the value when I run the same program in eclise I get 32 and i386. Something is wrong in eclipse that is causing it to try and run it on a 32 bit JVM. when I try java -d32 -version it says that a 32 bit enviroment isn't installed but Eclipse doesn't know that. I've modified the Eclipse.ini file and still nothing is working. I've restarted eclipse after these changes...nothing. Can some one who knows eclipse well people help me out here. thanks
Add the -vm tag to eclipse.ini or the shortcut to explicitly specify a JRE. Note that the default for Windows XP is to use the CRAPPY JRE that comes with Windows.
-vm "%JAVA_HOME%/bin/javaw.exe"
In eclipse.ini add:
-Xmx8g
-d64
For me its working properly! . Make sure your path is c:\Program File not c:\Program File(X86) ( if you installed 64 bit JDK it should store in c:\ Program Files)
Eclipse configuration is explained here
The "installed JREs" (better use JDKs) are used for building and running your code and can be of different architecture or Java version. The JVM used for running Eclipse is defined in the eclipse.ini file. You should use the version for the architecture of the JVM.
Okay. This has been rather headache inducing, but I believe I have a solution. After changing the eclipse.ini, Go to your project properties. Under the Run/Debug settings, edit the launch configuration for your project. Under the JRE tag, click installed JREs. When that dialog comes up, click search. Go to your program files folder, NOT the x86 one, and let it search for your JREs. When the latest comes up, deselect the JRE that was currently selected and select the most recent JRE that it found. I renamed mine JRE7-64 just so I could identify a difference. This solved the issue on my end. Good luck
I think there is a bug in the Run Configuration page.
I had to add the 64-bit JRE in run configuration, select it, and DELETE the 32-bit entry (even though it was already deselected).
eclipse.ini didn't work for me.
This is Eclipse Luna.
I'm using JNI to access a native C file through my java program. I've created an shared object which eclipse and the project can now see. The problem I'm getting now is
Exception in thread "main" java.lang.UnsatisfiedLinkError: /opt/sw/libs/xda_core/.1.24.1-1/lib/lib_xda_core_java.so: /opt/sw/libs/xda_core/.1.24.1-1/lib/libxda_core_java.so: wrong ELF class: ELFCLASS64 (Possible cause: architecture word width mismatch)
The so is a binary which was made for 64bit architecture. It sounds like there is a mismatch in the JVM and the so. I checked my JVM and it is a 64 bit runtime. However when I used
System.Property("sun.arch.data.model") it returned "32" I think eclipse is running in a 32 bit JVM and this is why my JNI Native library won't link correctly and I'm getting that error.
Any suggestions? Is this because I have a 32 bit version of eclipse? or is there a way I can force eclipse to use the 64 bit JVM that is installed.
Edit: I have tried everyone's suggestions and nothing is working. I've changed the execution, and enviroment variables to point to the newst JDK I have which is 1.6_30. when I run the program from a command line I get 64 and amd64 as the value when I run the same program in eclise I get 32 and i386. Something is wrong in eclipse that is causing it to try and run it on a 32 bit JVM. when I try java -d32 -version it says that a 32 bit enviroment isn't installed but Eclipse doesn't know that. I've modified the Eclipse.ini file and still nothing is working. I've restarted eclipse after these changes...nothing. Can some one who knows eclipse well people help me out here. thanks
Reconfigure Eclipse to use a 64-bit JVM to launch your program, since you've built a 64-bit JNI shared library.
I'm trying to run eclipse for java in Windows 7 64bit edition, and when I run the eclipse.exe file, absolutely nothing happens. A ephimeral javaw.exe process is created in the task manager, but as I said, it's just there for a split second, and it disappears, after that NOTHING. I tried compiling a small program with the javac.exe file, and that works all right, but for some reason I cannot run Eclipse.
Any suggestions on what I could be doing wrong. I'm a complete Java noob, it's the first time I try to do this.
These are the files I have, and I downloaded the Windows 64bit version of eclipse.
Thanks!
EDIT
OK, solved. The book I'm using is misleading... it said I should use the javaw.exe file from jdk1.6.0_21, and doing that didn't work. Now I tried with one in jre6, and it ran.
Thanks everyone and sorry for the hassle!
First, check you eclipse.ini (even a space at the end of a line can prevent eclipse from starting)
Second I am surprised to see java* file in your Eclipse distribution.
You shouldn't' have those, and instead refer to the right java (64 bits) in your eclipse.ini.
In both case, see this eclipse.ini as a good example.
Check also the <workspace>/.metadata/.log (error log file).
I just added it there because it was asking for it, supposedly the best way it to put it in the PATH.
If eclipse is "asking for it", that means your current java installation is not part of the PATH. It need to be reference from the eclipse.ini file.
See also FAQ How do I run Eclipse?
In any event, don't copy any java files around.
Used in your eclipse.ini a path like:
-vm
C:/Prog/Java/jdk1.6.0_21/jre/bin/server/jvm.dll
Do you have the 64-bit version of Java? http://www.java.com/en/download/faq/java_win64bit.xml
I experienced relatively little trouble moving to 64-bit java:
Download Eclipse Helios 64-bit version
Download Java 6 SDK 64-bit version
Install both
Run
The issues may arise if you have both 32-bit and 64-bit JDKs in the same machine. If you want to explicitly run Eclipse with one JVM, then you need to specify its full path in eclipse.ini.
e.g.
-vm
C:/Program Files/Java/jdk1.6.0_20/bin/javaw.exe
Where the path points to the 64-bit version.
The other issue I encountered after moving is that the Subclipse plugin by default uses a 32-bit DLL backend and therefore doesn't work. However Subclipse also works with a pure-Java back-end for Eclipse called JavaHL which solved that issue.
I faced similar problem and did not know how to proceed.
I did following things to resolve it.
In eclipse.ini enter the vm argument to which jre you want to use
-vm
C:\Java\jdk1.7\jre\bin\javaw.exe
If you have -Dosgi.requiredJavaVersion=1.7 line in your eclipse
make sure that version is matching the one that is mentione in step 1.
( in my case it was 1.6 and I had to change this value to 1.7)
Launch eclipse.exe from the command line