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我经常从SBT获得OutOfMemoryError。如何防止java.lang.OutOfMemoryError：PermGen空间？
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
任何解决方案：
> 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,[email protected]), ?)
[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.
有时也突然退出？
你不会说你正在使用哪个版本的SBT，但是早期版本在项目定义的几次重新加载之后很容易耗尽PermGen。目前的版本看起来对这个问题很好，但你可能仍然需要增加分配。 – 2013-04-11 22:22:04
@RandallSchulz，版本是0.12.2。 – missingfaktor 2013-04-12 04:59:37
还提到Java版本和操作系统。 – SSR 2013-04-12 07:58:23