java.lang.OutOfMemoryError：Scala 上超出了 GC 开销限制

Question

我是 Scala 开发人员，如果我添加另一行抛出下面的错误，我会在包含1008 行的路由文件中收到此错误。

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Uncaught error from thread [sbt-web-scheduler-1] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[sbt-web]\njava.lang.OutOfMemoryError: GC overhead limit exceeded\n        at java.util.jar.Manifest$FastInputStream.<init>(Unknown Source)\n        at java.util.jar.Manifest$FastInputStream.<init>(Unknown Source)\n        at java.util.jar.Manifest.read(Unknown Source)\n        at java.util.jar.Manifest.<init>(Unknown Source)\n        at java.util.jar.JarFile.getManifestFromReference(Unknown Source)\n        at java.util.jar.JarFile.getManifest(Unknown Source)\n        at sun.misc.URLClassPath$JarLoader$2.getManifest(Unknown Source)\n        at java.net.URLClassLoader.defineClass(Unknown Source)\n[ERROR] [04/12/2016 15:17:32.883] [sbt-web-scheduler-1] [ActorSystem(sbt-web)] exception on LARS\xc3\x86 timer thread\n        at java.net.URLClassLoader.access$100(Unknown Source)\njava.lang.OutOfMemoryError: GC overhead limit exceeded\n        at java.net.URLClassLoader$1.run(Unknown Source)\n        at java.net.URLClassLoader$1.run(Unknown Source)\n        at akka.actor.LightArrayRevolverScheduler$$anon$8.nextTick(Scheduler.scala:409)\n        at java.security.AccessController.doPrivileged(Native Method)\n        at akka.actor.LightArrayRevolverScheduler$$anon$8.run(Scheduler.scala:375)\n        at java.net.URLClassLoader.findClass(Unknown Source)\n        at java.lang.ClassLoader.loadClass(Unknown Source)\n        at java.lang.Thread.run(Unknown Source)\n        at java.lang.ClassLoader.loadClass(Unknown Source)\n\n        at akka.event.Logging$Info$.apply(Logging.scala:665)\n        at akka.event.BusLogging.notifyInfo(Logging.scala:1140)\n        at akka.event.LoggingAdapter$class.info(Logging.scala:950)\n        at akka.event.BusLogging.info(Logging.scala:1128)\n        at akka.actor.LightArrayRevolverScheduler$$anon$8.run(Scheduler.scala:382)\n[ERROR] [04/12/2016 15:18:33.808] [sbt-web-scheduler-1] [ActorSystem(sbt-web)] Uncaught error from thread [sbt-web-scheduler-1]         at java.lang.Thread.run(Unknown Source)\nshutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled\njava.lang.OutOfMemoryError: GC overhead limit exceeded\n        at java.util.jar.Manifest$FastInputStream.<init>(Unknown Source)\n        at java.util.jar.Manifest$FastInputStream.<init>(Unknown Source)\n        at java.util.jar.Manifest.read(Unknown Source)\n        at java.util.jar.Manifest.<init>(Unknown Source)\n        at java.util.jar.JarFile.getManifestFromReference(Unknown Source)\n        at java.util.jar.JarFile.getManifest(Unknown Source)\n        at sun.misc.URLClassPath$JarLoader$2.getManifest(Unknown Source)\n        at java.net.URLClassLoader.defineClass(Unknown Source)\n        at java.net.URLClassLoader.access$100(Unknown Source)\n        at java.net.URLClassLoader$1.run(Unknown Source)\n        at java.net.URLClassLoader$1.run(Unknown Source)\n        at java.security.AccessController.doPrivileged(Native Method)\n

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路线中接受多少条线路？我该如何解决这个问题？

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编辑：日食

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谢谢\nB.UdayaKumar

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Answer 1

通常，当 Java 堆中没有足够的空间来分配对象时，会抛出此错误。在这种情况下，垃圾收集器无法腾出空间来容纳新对象，并且堆也无法进一步扩展。此外，当本机内存不足以支持 Java 类的加载时，也可能会引发此错误。在极少数情况下，java.lang.OutOfMemoryError当花费过多的时间进行垃圾收集并且释放很少的内存时，可能会抛出 a 。

您基本上已经耗尽内存来顺利运行该过程。我想到的选项是：

• 使用JAVA_OPTS环境变量指定更多内存，尝试介于两者之间的内容，例如 - Xmx1G。
• 您还可以通过启用来手动调整 GC-XX:+UseConcMarkSweepGC

有关 GC 调优的更多选项，请参阅并发标记扫描

增加 HEAP 大小应该可以解决您的路由限制问题。