如何预防 java.lang.OutOfMemoryError: PermGen 空间？

OutOfMemoryError

> test

[error] java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: PermGen space

[error] Use 'last' for the full log.

> last

[debug] Running task... Cancelable: false, check cycles: false

[debug]

[debug] Initial source changes:

[debug] removed:Set//

[debug] added: Set//

[debug] modified: Set//

[debug] Removed products: Set//

[debug] Modified external sources: Set//

[debug] Modified binary dependencies: Set//

[debug] Initial directly invalidated sources: Set//

[debug]

[debug] Sources indirectly invalidated by:

[debug] product: Set//

[debug] binary dep: Set//

[debug] external source: Set//

[debug] Initially invalidated: Set//

[debug] Copy resource mappings:

[debug]

[debug]

[debug] Initial source changes:

[debug] removed:Set//

[debug] added: Set//

[debug] modified: Set//

[debug] Removed products: Set//

[debug] Modified external sources: Set//

[debug] Modified binary dependencies: Set//

[debug] Initial directly invalidated sources: Set//

[debug]

[debug] Sources indirectly invalidated by:

[debug] product: Set//

[debug] binary dep: Set//

[debug] external source: Set//

[debug] Initially invalidated: Set//

[debug] Copy resource mappings:

[debug]

[debug] Framework implementation 'org.scalacheck.ScalaCheckFramework' not present.

[debug] Framework implementation 'org.specs.runner.SpecsFramework' not present.

[debug] Framework implementation 'org.scalatest.tools.ScalaTestFramework' not present.

[debug] Framework implementation 'com.novocode.junit.JUnitFramework' not present.

[debug] Subclass fingerprints: Stream//org.specs2.specification.SpecificationStructure,false,org.specs2.runner.Fingerprints$$anon$1@34d6488c/, ?/

[debug] Annotation fingerprints: Stream//

[debug] Running Test ExpandoObjectTest : subclass/false, org.specs2.specification.SpecificationStructure/ with arguments

java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: PermGen space

 at java.util.concurrent.FutureTask$Sync.innerGet/FutureTask.java:252/

 at java.util.concurrent.FutureTask.get/FutureTask.java:111/

 at sbt.ConcurrentRestrictions$$anon$4.take/ConcurrentRestrictions.scala:196/

 at sbt.Execute.next$1/Execute.scala:85/

 at sbt.Execute.processAll/Execute.scala:88/

 at sbt.Execute.runKeep/Execute.scala:68/

 at sbt.EvaluateTask$.run$1/EvaluateTask.scala:162/

 at sbt.EvaluateTask$.runTask/EvaluateTask.scala:177/

 at sbt.Aggregation$$anonfun$4.apply/Aggregation.scala:46/

 at sbt.Aggregation$$anonfun$4.apply/Aggregation.scala:44/

 at sbt.EvaluateTask$.withStreams/EvaluateTask.scala:137/

 at sbt.Aggregation$.runTasksWithResult/Aggregation.scala:44/

 at sbt.Aggregation$.runTasks/Aggregation.scala:59/

 at sbt.Aggregation$$anonfun$applyTasks$1.apply/Aggregation.scala:31/

 at sbt.Aggregation$$anonfun$applyTasks$1.apply/Aggregation.scala:30/

 at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply/Command.scala:62/

 at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply/Command.scala:62/

 at sbt.Command$.process/Command.scala:90/

 at sbt.MainLoop$$anonfun$next$1$$anonfun$apply$1.apply/MainLoop.scala:71/

 at sbt.MainLoop$$anonfun$next$1$$anonfun$apply$1.apply/MainLoop.scala:71/

 at sbt.State$$anon$2.process/State.scala:170/

 at sbt.MainLoop$$anonfun$next$1.apply/MainLoop.scala:71/

 at sbt.MainLoop$$anonfun$next$1.apply/MainLoop.scala:71/

 at sbt.ErrorHandling$.wideConvert/ErrorHandling.scala:18/

 at sbt.MainLoop$.next/MainLoop.scala:71/

 at sbt.MainLoop$.run/MainLoop.scala:64/

 at sbt.MainLoop$$anonfun$runWithNewLog$1.apply/MainLoop.scala:53/

 at sbt.MainLoop$$anonfun$runWithNewLog$1.apply/MainLoop.scala:50/

 at sbt.Using.apply/Using.scala:25/

 at sbt.MainLoop$.runWithNewLog/MainLoop.scala:50/

 at sbt.MainLoop$.runAndClearLast/MainLoop.scala:33/

 at sbt.MainLoop$.runLoggedLoop/MainLoop.scala:17/

 at sbt.MainLoop$.runLogged/MainLoop.scala:13/

 at sbt.xMain.run/Main.scala:26/

 at xsbt.boot.Launch$.run/Launch.scala:55/

 at xsbt.boot.Launch$$anonfun$explicit$1.apply/Launch.scala:45/

 at xsbt.boot.Launch$.launch/Launch.scala:69/

 at xsbt.boot.Launch$.apply/Launch.scala:16/

 at xsbt.boot.Boot$.runImpl/Boot.scala:31/

 at xsbt.boot.Boot$.main/Boot.scala:20/

 at xsbt.boot.Boot.main/Boot.scala/

Caused by: java.lang.OutOfMemoryError: PermGen space

 at java.lang.ClassLoader.defineClass1/Native Method/

 at java.lang.ClassLoader.defineClass/ClassLoader.java:791/

 at java.security.SecureClassLoader.defineClass/SecureClassLoader.java:142/

 at java.net.URLClassLoader.defineClass/URLClassLoader.java:449/

 at java.net.URLClassLoader.access$100/URLClassLoader.java:71/

 at java.net.URLClassLoader$1.run/URLClassLoader.java:361/

 at java.net.URLClassLoader$1.run/URLClassLoader.java:355/

 at java.security.AccessController.doPrivileged/Native Method/

 at java.net.URLClassLoader.findClass/URLClassLoader.java:354/

 at java.lang.ClassLoader.loadClass/ClassLoader.java:423/

 at java.lang.ClassLoader.loadClass/ClassLoader.java:356/

 at sbt.Project$$anon$5.apply/Project.scala:130/

 at sbt.Project$$anon$5.apply/Project.scala:128/

 at sbt.LogManager$.commandBase$1/LogManager.scala:59/

 at sbt.LogManager$.command$1/LogManager.scala:60/

 at sbt.LogManager$$anonfun$suppressedMessage$1.apply/LogManager.scala:61/

 at sbt.LogManager$$anonfun$suppressedMessage$1.apply/LogManager.scala:61/

 at sbt.ConsoleLogger.trace/ConsoleLogger.scala:163/

 at sbt.AbstractLogger.log/Logger.scala:32/

 at sbt.MultiLogger$$anonfun$dispatch$1.apply/MultiLogger.scala:40/

 at sbt.MultiLogger$$anonfun$dispatch$1.apply/MultiLogger.scala:38/

 at scala.collection.LinearSeqOptimized$class.foreach/LinearSeqOptimized.scala:59/

 at scala.collection.immutable.List.foreach/List.scala:76/

 at sbt.MultiLogger.dispatch/MultiLogger.scala:38/

 at sbt.MultiLogger.trace/MultiLogger.scala:30/

 at sbt.TestLogger$$anon$2.trace/TestReportListener.scala:71/

 at sbt.TestLogger.endGroup/TestReportListener.scala:88/

 at sbt.TestRunner$$anonfun$run$5.apply/TestFramework.scala:87/

 at sbt.TestRunner$$anonfun$run$5.apply/TestFramework.scala:87/

 at sbt.TestFramework$$anonfun$safeForeach$1.apply/TestFramework.scala:112/

 at sbt.TestFramework$$anonfun$safeForeach$1.apply/TestFramework.scala:112/

 at scala.collection.LinearSeqOptimized$class.foreach/LinearSeqOptimized.scala:59/

[error] java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: PermGen space

[error] Use 'last' for the full log.

sbt appears to be exiting abnormally.

 The log file for this session is at /var/folders/vf/3khb58091wd0_1rz1yh6knb00000gp/T/sbt3242766352271599341.log

java.lang.OutOfMemoryError: PermGen space

Error during sbt execution: java.lang.OutOfMemoryError: PermGen space