CODEWITHSUNDEEP
javamaven
Dave
Dave

Reputation: 4328

MAVEN_OPTS ignored when setting java heap size

How is this possible? I do not understand linux correctly because I do not know how this can happen. I believe there is something else happening here as im trying to set the max heap size to 1G and it is failing

The MAVEN_OPTS specify a heap of 1024m but the maven command fails because the heap is 4096m. The machine is 32 bit with 6G installed

Memory

$free -h
             total       used       free     shared    buffers     cached
Mem:          5.8G       3.8G       2.0G       186M       351M       2.1G
-/+ buffers/cache:       1.3G       4.4G
Swap:         5.8G         0B       5.8G

Maven

echo $MAVEN_OPTS
-Xms512m -Xmx1024m -XX:MaxPermSize=1024m

$ mvn -version
Invalid maximum heap size: -Xmx4096m
The specified size exceeds the maximum representable size.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

Java

java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) Server VM (build 25.111-b14, mixed mode)

Linux

uname -a 102-Ubuntu SMP Tue Aug 11 14:28:35 UTC 2015 i686 i686 i686 GNU/Linux

Upvotes: 1

Views: 9836

Answers (2)

Mr Moose
Mr Moose

Reputation: 6354

I just ran across this same error, and the solution was provided to my via this blog post. In the post, it is stated;

Check mvn.bat: the MAVEN_OPTS is passed as JVM parameter directly:

SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" %MAVEN_JAVA_EXE% %MAVEN_OPTS% -classpath %CLASSWORLDS_JAR% "-Dclassworlds.conf=%M2_HOME%\bin\m2.conf" "-Dmaven.home=%M2_HOME%" %CLASSWORLDS_LAUNCHER% %MAVEN_CMD_LINE_ARGS%

If we run set MAVEN_OPTS="-Xmx1024M -XX:MaxPermSize=256M",the previous command would be replaced with %MAVEN_JAVA_EXE% "-Xmx1024M -XX:MaxPermSize=256M" ...

If we run java "-Xmx1024M -XX:MaxermSize=256M" -version: we will see same error message.

The solution is simple: We can run: set "MAVEN_OPTS=-Xmx1024M -XX:MaxPermSize=256M" or remove the double quotes completely: set MAVEN_OPTS=-Xmx1024M -XX:MaxPermSize=256M

The value of MAVEN_OPTS would be with no surrounding double quotes.

This certainly addressed my issue.

Upvotes: 0

rsh
rsh

Reputation: 79

Set again with below and try:

Linux:

export MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=1024m"

Windows

set MAVEN_OPTS="-Xmx1024m -XX:MaxPermSize=1024m"

Upvotes: 3

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