Protobuf-2.5.0在Mac OS时OutOfMemoryError解决方法

如下面所示： 

$mvn test

[INFO] Scanning for projects...

[WARNING] 

[WARNING] Some problems were encountered while building the effective model for com.google.protobuf:protobuf-java:bundle:2.5.0

[WARNING] 'build.plugins.plugin.version' for org.apache.felix:maven-bundle-plugin is missing. @ line 135, column 15

[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-compiler-plugin is missing. @ line 57, column 15

[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing. @ line 64, column 15

[WARNING] 

[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.

[WARNING] 

[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.

[WARNING] 

[INFO]                                                                         

[WARNING] File encoding has not been set, using platform encoding EUC_CN, i.e. build is platform dependent!

[INFO] Compiling 60 source files to /Users/frankie/hadoop/protobuf-2.5.0/java/target/test-classes

java.lang.OutOfMemoryError: Java heap space

at com.sun.tools.javac.util.Position$LineMapImpl.build(Position.java:139)

at com.sun.tools.javac.util.Position.makeLineMap(Position.java:63)

解决方法：

mvn test之前先执行export MAVEN_OPTS="-Xms256m -Xmx512m -Djava.awt.headless=true"