title: "java.lang.OutOfMemoryError: PermGen space" in Maven build
body: <p>I'm  getting this error while building Maven project, I increased MAVEN_OPTS but all the same, I found some similar posts but they are refering to something else. How do I fix this?</p>
  
  <pre><code>The system is out of resources.
  Consult the following stack trace for details.
  java.lang.OutOfMemoryError: PermGen space
          at java.lang.ClassLoader.defineClass1(Native Method)
          at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
          at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
          at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
          at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
          at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
          at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
          at java.security.AccessController.doPrivileged(Native Method)
          at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
          at org.codehaus.plexus.compiler.javac.IsolatedClassLoader.loadClass(IsolatedClassLoader.java:56)
          at com.sun.tools.javac.comp.Annotate.&lt;init&gt;(Annotate.java:52)
          at com.sun.tools.javac.comp.Annotate.instance(Annotate.java:36)
          at com.sun.tools.javac.jvm.ClassReader.&lt;init&gt;(ClassReader.java:215)
          at com.sun.tools.javac.jvm.ClassReader.instance(ClassReader.java:168)
          at com.sun.tools.javac.main.JavaCompiler.&lt;init&gt;(JavaCompiler.java:293)
          at com.sun.tools.javac.main.JavaCompiler.instance(JavaCompiler.java:72)
          at com.sun.tools.javac.main.Main.compile(Main.java:340)
          at com.sun.tools.javac.main.Main.compile(Main.java:279)
          at com.sun.tools.javac.main.Main.compile(Main.java:270)
          at com.sun.tools.javac.Main.compile(Main.java:87)
          at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
          at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
          at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          at java.lang.reflect.Method.invoke(Method.java:597)
          at org.codehaus.plexus.compiler.javac.JavacCompiler.compileInProcess(JavacCompiler.java:420)
          at org.codehaus.plexus.compiler.javac.JavacCompiler.compile(JavacCompiler.java:141)
          at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:493)
          at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:114)
          at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
          at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
          at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
          at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
  </code></pre>
  
  <p>I'm not as worried about how to fix as to how to fix it <em>in the maven ecosystem</em></p>