我正在使用Cassandra 1.1.1和使用Hector 1.0.5，我试图将数据（大量）插入到列族中。在执行我的程序期间，cassandra服务器崩溃并显示内存不足错误。之后我没有选择退出服务器。对于我试图存储html文件内容的一个列族，这会重复，我永远不会有机会完成它。 html文件内容从一行的225 KB数据到700 KB数据不等，我试图插入近1000条记录。
在程序中它会抛出以下内容
Exception in thread "main" me.prettyprint.hector.api.exceptions.HectorException: All host pools marked down. Retry burden pushed out to client.
at me.prettyprint.cassandra.connection.HConnectionManager.getClientFromLBPolicy(HConnectionManager.java:393)
at me.prettyprint.cassandra.connection.HConnectionManager.operateWithFailover(HConnectionManager.java:249)
at me.prettyprint.cassandra.model.ExecutingKeyspace.doExecuteOperation(ExecutingKeyspace.java:97)
at me.prettyprint.cassandra.model.MutatorImpl.execute(MutatorImpl.java:243)
at com.epocrates.soa.rx.util.DiseaseImporter.insertDisease(DiseaseImporter.java:207)
at com.epocrates.soa.rx.util.DiseaseImporter.batchProcess(DiseaseImporter.java:81)
at com.epocrates.soa.rx.
util.DiseaseImporter.main（DiseaseImporter.java:37）
java.io.IOError: java.io.IOException: Map failed
at org.apache.cassandra.db.commitlog.CommitLogSegment.<init>(CommitLogSegment.java:127)
at org.apache.cassandra.db.commitlog.CommitLogSegment.freshSegment(CommitLogSegment.java:80)
at org.apache.cassandra.db.commitlog.CommitLogAllocator.createFreshSegment(CommitLogAllocator.java:244)
at org.apache.cassandra.db.commitlog.CommitLogAllocator.access$500(CommitLogAllocator.java:49)
at org.apache.cassandra.db.commitlog.CommitLogAllocator$1.runMayThrow(CommitLogAllocator.java:104)
at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: Map failed
at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:758)
at org.apache.cassandra.db.commitlog.CommitLogSegment.<init>(CommitLogSegment.java:119)
... 6 more
Caused by: java.lang.OutOfMemoryError: Map failed
at sun.nio.ch.FileChannelImpl.map0(Native Method)
at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:755)
... 7 more
java.util.concurrent.RejectedExecutionException: ThreadPoolExecutor has shut down
at org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor$1.rejectedExecution(DebuggableThreadPoolExecutor.java:60)
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:767)
at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:658)
at org.apache.cassandra.service.StorageProxy.insertLocal(StorageProxy.java:457)
at org.apache.cassandra.service.StorageProxy.sendToHintedEndpoints(StorageProxy.java:314)
at org.apache.cassandra.service.StorageProxy$2.apply(StorageProxy.java:119)
at org.apache.cassandra.service.StorageProxy.performWrite(StorageProxy.java:260)
at org.apache.cassandra.service.StorageProxy.mutate(StorageProxy.java:193)
at org.apache.cassandra.thrift.CassandraServer.doInsert(CassandraServer.java:637)
at org.apache.cassandra.thrift.CassandraServer.internal_batch_mutate(CassandraServer.java:587)
at org.apache.cassandra.thrift.CassandraServer.batch_mutate(CassandraServer.java:595)
at org.apache.cassandra.thrift.Cassandra$Processor$batch_mutate.getResult(Cassandra.java:3112)
at org.apache.cassandra.thrift.Cassandra$Processor$batch_mutate.getResult(Cassandra.java:3100)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:32)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:34)
at org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:186)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
答案 0 :(得分：3)
这意味着你已经用完地址空间来将commitlog段映射到。
最佳解决方案：升级到64位JVM。
更糟糕的解决方案：在cassandra.yaml中，将commitlog_segment_size_in_mb和commitlog_total_space_in_mb都设置为16。
这不是第一次出现;我已经打开https://issues.apache.org/jira/browse/CASSANDRA-4422来改善默认值。