Java HotSpot(TM) 64 位服务器 VM 警告：忽略选项 MaxPermSize

Question

When building a Java 8 project with Maven:

mvn clean package

I get this message:

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0

How to remove this message?

Answer 1

Compatibility Guide for JDK 8 says that in Java 8 the command line flag MaxPermSize has been removed. The reason is that the permanent generation was removed from the hotspot heap and was moved to native memory. So in order to remove this message edit MAVEN_OPTS Environment User Variable:

Java 7

MAVEN_OPTS -Xmx512m -XX:MaxPermSize=128m

Java 8

MAVEN_OPTS -Xmx512m

Answer 2

The JDK 8 HotSpot JVM is now using native memory for the representation of class metadata and is called Metaspace .

The permanent generation has been removed. The PermSize and MaxPermSize are ignored and a warning is issued if they are present on the command line.

Answer 3

-XX:MaxPermSize=size

Sets the maximum permanent generation space size (in bytes). This option was deprecated in JDK 8, and superseded by the -XX:MaxMetaspaceSize option.

-XX:PermSize=size

Sets the space (in bytes) allocated to the permanent generation that triggers a garbage collection if it is exceeded. This option was deprecated in JDK 8 , and superseded by the -XX:MetaspaceSize option.

Answer 4

In JBoss EAP 6.4, right click on the server and open launch configuration under VM argument you will find

{-Dprogram.name=JBossTools: jboss-eap" -server -Xms1024m -Xmx1024m -XX:MaxPermSize=256m}

update it to

{-Dprogram.name=JBossTools: JBoss 6.4" -server -Xms512m -Xmx512m}

this will solve your problem.

Answer 5

I got similar message when running command line mvn (version 3.3.3) on Linux with Java 8. By opening maven script /$MAVEN-HOME/bin/mvn, found the following line

MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"

Where $MAVEN_PROJECTBASEDIR by default is your home directory. So two places you can take a look, first is file $MAVEN_PROJECTBASEDIR/.mvn/jvm.config if it exists. Secondly look at files possibly set up the environment variable MAVEN_OPTS. Candidate files are .bashrc, .bash_profile, .profile and those files included by them such as /etc/profile, /etc/bash.bashrc

I located

export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=256m"

in .bashrc in my system, change it to

export MAVEN_OPTS="-Xmx512m"

issue resolved

Answer 6

in case some one still get this kind of message. Its happen because you add JVM argument when running maven project. Because it is related with maven you can check your pom.xml file on your project.

find this line <argLine>...</argLine> , on my project I also have argument below

<argLine>-Xmx1024m -XX:MaxPermSize=512m -XX:+TieredCompilation -XX:TieredStopAtLevel=1</argLine>

you should replace MaxPermSize argument as -Xms123m -Xmx123m , since MaxPermSize is already deprecated and wont take any effect on your JVM config :

<argLine>-Xms512m -Xmx512m  -XX:+TieredCompilation -XX:TieredStopAtLevel=1</argLine>

Answer 7

Please to solve this problem we just have set installed JDK path in

standalone.conf

file which under the bin folder of JBoss\\Wildfly Server. To solve this we do the following steps:

1. Open the standlone.conf file which under JBoss_or_wildfly\\bin folder
2. Within this file find for #JAVA_HOME text.
3. Remove the # character and set your installed JDK path as JAVA_HOME="C:\\Program Files\\Java\\jdk1.8.0_65" Hope this will solve your problem Thanks

Answer 8

For Eclipse users...

Click Run —> Run configuration —> are —> set Alternate JRE for 1.6 or 1.7