java.lang.OutOfMemoryError: play框架中的PermGen空间

Question

编辑：- play ~run以运行我的项目

如何解决这个问题，我的项目正在测试阶段。每天5-6小时后，它会突然停止，并给出以下错误。如何删除此错误？

我正在用Scala2.1和playframework 2.2开发这个项目

    java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: PermGen space
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
Caused by: java.lang.OutOfMemoryError: PermGen space
    at sun.misc.Unsafe.defineClass(Native Method)
    at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:63)
    at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:399)
    at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:396)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:395)
    at sun.reflect.MethodAccessorGenerator.generateSerializationConstructor(MethodAccessorGenerator.java:113)
    at sun.reflect.ReflectionFactory.newConstructorForSerialization(ReflectionFactory.java:331)
    at java.io.ObjectStreamClass.getSerializableConstructor(ObjectStreamClass.java:1376)
    at java.io.ObjectStreamClass.access$1500(ObjectStreamClass.java:72)
    at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:493)
    at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:468)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:468)
    at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:365)
    at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:602)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1622)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
    at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1706)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1344)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: PermGen space
[error] Total time: 11065 s, completed 8 Feb, 2014 6:12:52 PM
1. Waiting for source changes... (press enter to interrupt)

java.lang.OutOfMemoryError: PermGen space
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) java.lang.reflect.InvocationTargetException
[error] Total time: 4 s, completed 8 Feb, 2014 6:12:57 PM
2. Waiting for source changes... (press enter to interrupt)

java.lang.OutOfMemoryError: PermGen space
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) java.lang.reflect.InvocationTargetException
[error] Total time: 4 s, completed 8 Feb, 2014 6:13:08 PM
3. Waiting for source changes... (press enter to interrupt)

java.lang.OutOfMemoryError: PermGen space
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) java.lang.reflect.InvocationTargetException
[error] Total time: 6 s, completed 8 Feb, 2014 6:13:54 PM
4. Waiting for source changes... (press enter to interrupt)
[error] Expected letter
[error] Expected symbol
[error] Expected '!'
[error] Expected '+'
[error] Expected '++'
[error] Expected ';'
[error] Expected end of input.
[error] Expected 'show'
[error] Expected '*'
[error] Expected '{'
[error] Expected project ID
[error] Expected configuration
[error] Expected key
[error] 9000
[error] ^
sbt appears to be exiting abnormally.
  The log file for this session is at /tmp/sbt7580663022166474466.log
java.lang.OutOfMemoryError: PermGen space
Error during sbt execution: java.lang.OutOfMemoryError: PermGen space
Exception in thread "Thread-125" java.lang.OutOfMemoryError: PermGen space

Answer 1

我也遇到了同样的问题，所以我导出了SBT_OPTS，如下所示：

export SBT_OPTS="-XX:+CMSClassUnloadingEnabled -XX:PermSize=512M -XX:MaxPermSize=1024M"

Answer 2

一般来说，这意味着你没有给你的JVM提供足够的内存，或者你有内存泄漏。看看人们是如何解决这些问题的：Dealing with "java.lang.OutOfMemoryError: PermGen space" error或搜索非播放特定的错误："java.lang.OutOfMemoryError: PermGen“。

查看您的日志，我注意到您可能正在从SBT或其他构建工具(如Maven )运行它(“等待源代码更改...”)。为了帮助SBT防止内存泄漏，您可以在午餐时添加以下参数：

java -Xms128M -Xmx1200M -Xss20M -XX:MaxPermSize=1200m -XX:+CMSClassUnloadingEnabled -jar `dirname $0`/sbt-launch.jar "$@"

注意类卸载命令行arg。一般来说，我注意到在SBT中运行的应用程序仍然会设法泄漏资源，但在生产环境中不会发生这种情况。您可以尝试在forked JVM模式下运行，以帮助SBT -例如，请参阅SBT-Revolver插件。如果你真的想知道你的应用程序是如何消耗内存的，以及它是否有内存泄漏，那么在构建工具之外运行它，比如将它部署到Tomcat或运行jar之类的容器。您可以附加jconsole等工具来观察内存使用情况。

Answer 3

首先，在启动JVM时增加perm gen的大小。

分析你的代码，找出为什么要使用perm gen。

寻找从不释放引用、深度递归任务等的集合。