Multithreading 带有CompletionService的Java堆空间

我可以做些什么来修复这个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。我正在用jSCSI.org在带有ext3的linux上格式化iscsi驱动程序。奇怪的是，当我用ext4格式化时，它运行得很好，而且时间非常快。引发错误的行是：byte[]returnval=startTask.get（）.getValue（）

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提前感谢，Felipe

java.lang.OutOfMemoryError:java堆空间错误会在泄漏的内存填满堆区域中的所有可用内存并且垃圾收集无法清理时抛出

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启动配置并添加（或增加，如果有）以下内容一样简单：

-Xmx1024m

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或者你可以继续免费试用。当我们找到java.lang.OutOfMemoryError的原因时，您将看到问题的确切位置以及解决方案指南。

我使用wait（）和notify（）解决了问题：

谢谢