I need to set
ANT_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m
JAVA_OPTS=-Xms1024m -Xmx6144m -XX:PermSize=1024m -XX:MaxPermSize=1024m
I have a system with 8gb(recently upgraded from 4 gb)
But once i set the ant opts to above said value I am not able to run any of my ant targets and I get the following error
[ERROR] Argument error: -Xmx6144m
[ERROR] Specified maximum heap size (6144 MB) is larger than the address space on this platform (4 GB).
[WARN ] -XX:PermSize=1024m is not a valid VM option. Ignoring
[WARN ] -XX:MaxPermSize=1024m is not a valid VM option. Ignoring
Could not create the Java virtual machine.
This indicates the Java that I have on my system
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Oracle JRockit(R) (build R28.1.0-123-138454-1.6.0_20-20101014-1351-windows-x86_64, compiled mode)
and I am running a Windows 7 on Intel Core 2 Duo 3Ghz processor and 8GB RAM.
PS: I did Google for the error and it was one of my first such occurrences where I did not get any links pointing to the specific solution.
As discussed in the comments:
It would seem that your ANT installation is using a 32-bit JVM. While a 64-bi JVM is in your PATH ANT doesn't obey the JVM in your PATH, it first looks at JAVA_HOME. You can verify this by running $JAVA_HOME/bin/java -version.
You can update your environment to set JAVA_HOME to the 64-bit version or change the ANT script to always use a specific version of Java.
The error message appears to be suggesting the platform is 32-bit. I imagine you can't actually use 4 GB.
I would try installing the 64-bit version of Java and using that.
For the HotSpot JVM I would expect to see
$ java -mx30g -version
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b05)
Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)
Related
I switched to the Azul JVM in order to use a native ARM JVM and Solr was no longer able to start up. I started seeing a new error in the log:
The stack size specified is too small, Specify at least 384k
If I switch back to the Oracle jvm I do not get this error.
Requirements for stack size appears to be different between ARM and x86 JVMs.
The relevant lines setting the default in bin/solr is:
# Pick default for Java thread stack size, and then add to SOLR_OPTS
if [ -z ${SOLR_JAVA_STACK_SIZE+x} ]; then
SOLR_JAVA_STACK_SIZE='-Xss256k'
fi
SOLR_OPTS+=($SOLR_JAVA_STACK_SIZE)
The default is too small for the ARM JVM to start up. To increase the stack size add the following line to bin/solr.in.cmd
SOLR_JAVA_STACK_SIZE='-Xss512k'
I faced the same error when trying to start Solr for my Rails app.
After a lot of digging, I fixed it by adding the following line to my .zshrc file.
export _JAVA_OPTIONS='-Xss512k'
My use case:
macOS Monterey (M1 2020)
openjdk version "1.8.0_332"
OpenJDK Runtime Environment (Zulu 8.62.0.19-CA-macos-aarch64) (build 1.8.0_332-b09)
OpenJDK 64-Bit Server VM (Zulu 8.62.0.19-CA-macos-aarch64) (build 25.332-b09, mixed mode)
We were running 32-bit JDK and jMeter 2.6, and were running into heap memory issues when simulating 8000 users spread out over the course of an hour.
We upgraded to 64-bit Java, and jMeter 2.12.
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)
When we run from the command line requesting a 4Gb heap (the server has 32Gb), we receive the message that the initial heap size is too large.
set JVM_ARGS="-Xms4G -Xmx4G -XX:NewSize=512m -XX:MaxNewSize=1G" jmeter.sh
When we add the option -d64 to JVM_ARGS, we no longer receive the error about the heap size, but it no longer finds the class
set JVM_ARGS="-d64 -Xms4G -Xmx4G -XX:NewSize=512m -XX:MaxNewSize=1G" jmeter.sh
Pointing it to the directory seems to have no effect
set JVM_ARGS="-d64 -Xms4G -Xmx4G -XX:NewSize=512m -XX:MaxNewSize=1G -cp mypath" jmeter.sh
Looking into jmeter.sh it seems you're trying to run JMeter on Linux or MacOSX. I believe you need to remove set word (or replace it with export)
Given you have correct java executable in PATH providing -d64 option shouldn't be required. Something like:
JAVA_HOME=/path/to/64-bit/jdk && export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH && export PATH
You can edit jmeter script and amend the following lines:
HEAP="-Xms512m -Xmx512m"
NEW="-XX:NewSize=128m -XX:MaxNewSize=128m"
"Telling" Jmeter to use Concurrent Mark Sweep (CMS) Garbage Collector can also improve JMeter-side performance greatly. The relevant line is:
-XX:+UseConcMarkSweepGC
See 9 Easy Solutions for a JMeter Load Test “Out of Memory” Failure article for more information on getting the most from your JMeter installation.
I installed jQAssistant, set the JQASSISTANT_OPTS variable to -Xmx1024M -XX:MaxPermSize=512m as recommended and then get (when starting jqassistant.cmd):
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.
I guess that jQAssistant is running on the wrong version of Java. Does anyone no how to determine or change the Java version? Or is there any other reason behind this?
Just run
> set PATH
on the command line prompt. You'll see output like the following containing the path to the Java installation that is used when running jqassistant.cmd:
`Path=C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Git\cmd;C:\Program Files (x86)\GNU\GnuPG\pub;C:\Program Files (x86)\PuTTY;C:\Development\apache-maven-3.3.9\bin;C:\Program Files\Java\jdk1.8.0_77\bin;C:\Program Files (x86)\Skype\Phone\;C:\Program Files\TortoiseGit\bin;C:\Development\jruby-9.0.4.0\bin`
(the relevant part in this case is "C:\Program Files\Java\jdk1.8.0_77\bin").
You can verify this by running:
> java -version
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)
Usually the given parameters should work on all Oracle JVMs even if 1.8 releases will issue a warning about the no longer supported MaxPermSize parameter.
Can you provide an information what is running on your machine?
I have a 64 bit linux os:
$ uname -p
x86_64
java -version listed:
java version "1.6.0_43"
Java(TM) SE Runtime Environment (build 1.6.0_43-b01)
Java HotSpot(TM) Server VM (build 20.14-b01, mixed mode)
I am trying to run a 64 bit jvm with 4096 min heap size ( Its a heavy weight app ). When i add -d64 option i get the message
Running a 64-bit JVM is not supported on this platform
With out -d4 option and with heap size 2048 it works fine. But the memory isnt enough so i need to use 64 bit JVM with 4Gigs. Can anyone tell me why its not accepting d64 ?
Thanks #Adi Dembark and #nos found the issue. It was indeed a 32 bit jvm. changing to 64 bit fixed it.
In my BAT file I would like to have something like:
set javaVersion=...
if %javaVersion% equ 32 (
echo "do 32 Java routine"
) else (
echo "do non-32 Java routine"
)
On a 64bit machine, with JRE 64bit installed, in the registry under HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment and HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.6 I see almost the same values as on a 32bit machine with JRE 32bit installed:
HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment
CurrentVersion: 1.6
Java6FamilyVersion: 1.6.0_26
HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.6
JavaHome: C:\Program Files\Java\jre6
MicroVersion: 0
RuntimeLib: C:\Program Files\Java\jre6\bin\client\jvm.dll
Therefore, I could check if it is 64bit Java by checking if PROGRAMFILES(X86) is defined and if JavaHome points to location which starts with C:\Program Files\.
But is there a better option?
Actually, the 32-Bit Server does not output "32-Bit". On my system (32-bit Kubuntu), I get the following java -versionoutput:
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
Java HotSpot(TM) Server VM (build 20.1-b02, mixed mode)
Therefore, it's a better idea to just test for absence of 64-Bit, instead of presence of either.
You could capture the output of java -version - it's in there.
Here's the output on my mac:
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-384-10M3425)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-384, mixed mode)
You should find either "64-Bit" or "32-Bit" in the output.
If you just need to know if there is Java available then run a small class doing something with the default java command.
If you need to know which libraries to use, then instead of poking around the registry then run a small class which tries to call native code in your libraries and let the bat file know if it went well, and run it once for each of your supported platforms.
If none works, then report that. If one or more works then choose the one you like best and use that.
In other words: Explicitly test for what you need to know. Any assumptions will eventually fail.
The simplest way to do this is to parse the exit code of java -d64 -version.
For 64-bit JDK, it would be 0, for 32-bit: 1.
So, you may introduce new variable java64bit:
java -d64 -version >NUL 2>NUL
set java64bit=%ERRORLEVEL%