Out of memory during mvn install

[mcandre]

I'm trying to follow the directions for installing scalastyle from source, but I'm getting an out of memory error.

Trace

$ mvn install
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Scalastyle style checker for Scala 0.6.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-enforcer-plugin:1.0:enforce (enforce-maven) @ scalastyle_2.10 ---
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ scalastyle_2.10 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 6 resources
[INFO] Copying 0 resource
[INFO] 
[INFO] --- scala-maven-plugin:3.1.0:add-source (scala-compile-first) @ scalastyle_2.10 ---
[INFO] Add Source directory: /Users/andrew/Desktop/src/scalastyle/src/main/scala
[INFO] Add Test Source directory: /Users/andrew/Desktop/src/scalastyle/src/test/scala
[INFO] 
[INFO] --- scala-maven-plugin:3.1.0:compile (scala-compile-first) @ scalastyle_2.10 ---
[WARNING]  Expected all dependencies to require Scala version: 2.10.4
[WARNING]  org.scalariform:scalariform_2.10:0.1.4 requires scala version: 2.10.0
[WARNING] Multiple versions of scala libraries detected!
[INFO] Using incremental compilation
[INFO] Compiling 51 Scala sources to /Users/andrew/Desktop/src/scalastyle/target/classes...
[WARNING] there were 5 deprecation warning(s); re-run with -deprecation for details
[WARNING] there were 4 feature warning(s); re-run with -feature for details
[WARNING] two warnings found
[INFO] 
[INFO] --- maven-compiler-plugin:2.5.1:compile (default-compile) @ scalastyle_2.10 ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ scalastyle_2.10 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO] 
[INFO] --- scala-maven-plugin:3.1.0:testCompile (scala-test-compile) @ scalastyle_2.10 ---
[WARNING]  Expected all dependencies to require Scala version: 2.10.4
[WARNING]  org.scalariform:scalariform_2.10:0.1.4 requires scala version: 2.10.0
[WARNING] Multiple versions of scala libraries detected!
[INFO] Using incremental compilation
[INFO] Compiling 60 Scala sources to /Users/andrew/Desktop/src/scalastyle/target/test-classes...
[WARNING] Class org.slf4j.Logger not found - continuing with a stub.
[ERROR] PermGen space -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/OutOfMemoryError

Am I doing something wrong?

System

$ specs scala java os
Specs:

specs 0.8
https://github.com/mcandre/specs#readme

sbt sbt-version
[info] Loading project definition from /Users/andrew/Desktop/src/scalastyle/project
Missing bintray credentials /Users/andrew/.bintray/.credentials. Some bintray features depend on this.
[info] Set current project to scalastyle (in build file:/Users/andrew/Desktop/src/scalastyle/)
[info] 0.13.2

scalac -version
Scala compiler version 2.11.1 -- Copyright 2002-2013, LAMP/EPFL

mvn --version
Apache Maven 3.1.1 (0728685237757ffbf44136acec0402957f723d9a; 2013-09-17 10:22:22-0500)
Maven home: /usr/local/Cellar/maven/3.1.1/libexec
Java version: 1.7.0_40, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.9.4", arch: "x86_64", family: "mac"

echo $CLASSPATH


echo $JAVA_HOME
/Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home

javac -version
javac 1.7.0_40

java -version
java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b43)
Java HotSpot(TM) 64-Bit Server VM (build 24.0-b56, mixed mode)

system_profiler SPSoftwareDataType | grep 'System Version'
      System Version: OS X 10.9.4 (13E28)

[splunk-brallen]

Have you tried increasing your perm size? Something like export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=128m"
Could try doubling those sizes as well.

[mcandre]

Yes, export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=128m" helps to mitigate this issue.

Could we keep this option in a .jvmopts file to improve the out-of-the-box compile experience.

[matthewfarwell]

I could add something into the compilation instructions to help if you want?

[mcandre]

No. If scalastyle requires more than the default JVM permsize, then the build should be configured accordingly. Don't make users do even more extra steps to make scalastyle.

[matthewfarwell]

There is a fork option for the scala compiler so I could add the options to the pom. However, I don't know the correct options for your system. You may have more/less memory than me. By default, the JVM allocates you an amount of memory based on a number of things - amount of memory, the operating system, the mode that you are running in - it is different for client and server.

Note that you can't necessarily predict that your build will fail with a permgen error either. I have this problem sometimes. Most of the time (for me at least), when I get an error like this, just rerunning the command works. This is because maven is compiling internal classes which it then uses to compile the sources.

I'd have to add a value of memory option which would work in all cases, and there are simply too many variables. I can recommend a value, but I'm not going to force one on you.

Note that you can put the export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=128m" into your .bashrc and then you don't have to worry about it again.

[matthewfarwell]

Is this still a problem for you?

[matthewfarwell]

Closing this. If this is still a problem for you, please either reopen this issue or create a new one.