Scala compile server - VM warning

Question

I'm using java + scala (with sbt) at one project.

Language info:

nazar@desktop:~⟫ java -version
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)
nazar@desktop:~⟫ scala -version
Scala code runner version 2.10.4 -- Copyright 2002-2013, LAMP/EPFL

When I'm running any main() I got a strange warning prompt:

warning

I couldn't figure out this behaviour.

UPDATE:

I checked sbt options it has the same behaviour:

nazar@desktop:~⟫ sbt -version
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256M; support was removed in 8.0

Thanks for so fast explanation new features for Java 1.8!

But how to solve occurrence of MaxPermSise warning?

here is content of idea.vmoptions:

-server
-Xms128m
-Xmx512m
-XX:MaxPermSize=250m
-XX:ReservedCodeCacheSize=64m
-ea
-Dsun.io.useCanonCaches=false
-Djava.net.preferIPv4Stack=true
-Djsse.enableSNIExtension=false
-XX:+UseCodeCacheFlushing
-XX:+UseConcMarkSweepGC
-XX:SoftRefLRUPolicyMSPerMB=50
-Dawt.useSystemAAFontSettings=lcd

Eclipse has eclipse.ini:

-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20130327-1440.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.200.v20130807-1835
-product
org.eclipse.epp.package.jee.product
--launcher.defaultAction
openFile
-showsplash
org.eclipse.platform
--launcher.XXMaxPermSize
256m
--launcher.defaultAction
openFile
--launcher.appendVmargs
-vm
/usr/lib/jvm/java-8-oracle/bin/java
-/home/nazar/optional/java/jdk1.8.0/bin/java
-vmargs
-Dosgi.requiredJavaVersion=1.6
-XX:MaxPermSize=256m
-Xms40m
-Xmx1024m
-Dorg.eclipse.swt.browser.IEVersion=10001

UPDATE2

I deleted from both configuration files all lines which contain MaxPermSize.

But this error warning keep arising (when main() is running, and run sbt -version at the terminal).

Any suggestions?

score 1 · Accepted Answer · edited Apr 24 '14 at 18:19

1

The PermGen management has changed in Java 8. IIRC, it's managed directly in the OS memory. Consequently, limitations and customizations used until then are not available anymore. Particularly, MaxPermSize does not have any meaning anymore. I suppose intellij does have this option by default when it runs a sbt application.

You'll find more information about changes in Java 8 here : http://openjdk.java.net/projects/jdk8/milestones

edited Apr 24 '14 at 18:19

skiwi

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answered Apr 24 '14 at 18:07

Agemen

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Did you mean to say *MaxPermSize does not have any* **meaning** *anymore*? – skiwi Apr 24 '14 at 18:16
That's what I've understood, yes. There's no memory for permgen in the jvm memory anymore, so there's no need to customize it. – Agemen Apr 24 '14 at 18:17
@Agemen Really tricky changes. How to solve this issue, now? – catch23 Apr 24 '14 at 20:26
@nazar_art Do we have to spell it out for you? Just remove that option if you don't want to see the warning. – JasonMArcher Apr 24 '14 at 21:41
@Agemen I did it for both IDE. But this warning keep arising. What is missed? – catch23 Apr 24 '14 at 23:11

Scala compile server - VM warning

1 Answers1