Question

我该怎么做才能解决这个OutOfMemoryError：Java堆空间：

17:29:23 ERROR pool-10-thread-2 storage.JCloudsStorageModule - Error on writing bucketIndex: 4167 and bucketOffset: 1044480
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.jscsi.target.storage.JCloudsStorageModule.getAndprefetchBuckets(JCloudsStorageModule.java:275)
    at org.jscsi.target.storage.JCloudsStorageModule.write(JCloudsStorageModule.java:318)
    at org.jscsi.target.connection.stage.fullfeature.WriteStage.execute(WriteStage.java:223)
    at org.jscsi.target.connection.phase.TargetFullFeaturePhase.execute(TargetFullFeaturePhase.java:197)
    at org.jscsi.target.connection.Connection$TargetConnection.call(Connection.java:252)
    at org.jscsi.target.connection.Connection$TargetConnection.call(Connection.java:77)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.OutOfMemoryError: Java heap space
    at org.jscsi.target.storage.JCloudsStorageModule$ReadTask.call(JCloudsStorageModule.java:401)
    at org.jscsi.target.storage.JCloudsStorageModule$ReadTask.call(JCloudsStorageModule.java:371)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    ... 4 more
java.io.IOException: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
    at org.jscsi.target.storage.JCloudsStorageModule.write(JCloudsStorageModule.java:328)
    at org.jscsi.target.connection.stage.fullfeature.WriteStage.execute(WriteStage.java:223)
    at org.jscsi.target.connection.phase.TargetFullFeaturePhase.execute(TargetFullFeaturePhase.java:197)
    at org.jscsi.target.connection.Connection$TargetConnection.call(Connection.java:252)
    at org.jscsi.target.connection.Connection$TargetConnection.call(Connection.java:77)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.jscsi.target.storage.JCloudsStorageModule.getAndprefetchBuckets(JCloudsStorageModule.java:275)
    at org.jscsi.target.storage.JCloudsStorageModule.write(JCloudsStorageModule.java:318)
    ... 8 more
Caused by: java.lang.OutOfMemoryError: Java heap space
    at org.jscsi.target.storage.JCloudsStorageModule$ReadTask.call(JCloudsStorageModule.java:401)
    at org.jscsi.target.storage.JCloudsStorageModule$ReadTask.call(JCloudsStorageModule.java:371)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    ... 4 more

我的代码使用CompletionService和ConcurrentHashMap。我在linux上用ext3格式化了一个带有jSCSI.org的iscsi驱动程序。奇怪的是，当我用ext4格式化时，它进展顺利且时间非常快。抛出错误的行是：byte [] returnval = startTask.get（）。getValue（）;

提前致谢，费利佩

Answer 1

只要泄漏的内存填满堆区域中的所有可用内存，并且垃圾回收无法清除它，就会抛出java.lang.OutOfMemoryError:Java heap space错误。

尝试增加此类资源的可用性。当您的应用程序没有足够的Java堆空间内存来正常运行时，修复它就像更改JVM启动配置和添加（或增加（如果存在）以下内容一样简单：-Xmx1024m

或者您可以免费试用Plumbr。当我们找到java.lang.OutOfMemoryError的原因时，您会看到问题的确切位置以及解决方案指南。

Answer 2

我使用wait（）和notify（）来解决问题：

https://sites.google.com/site/lipe82/Home/diaadia/executorservicewait

谢谢！

带有CompletionService的Java堆空间

2 个答案: