create mapped file引发io异常，但该文件确实是在磁盘上成功创建的。

我在创建新地图文件时遇到问题。它引发一个io异常并重试30次，但都以io异常失败。但我发现mapfile确实是在磁盘上创建的succ文件，并且它的文件大小是正确的。

你能帮我吗？

下面是异常堆栈。

2018-10-09 01:14:50 WARN ReputMessageService - [BUG]put commit log position info to BenchmarkTest:304 265047020213 failed, retry 2 times 2018-10-09 01:14:51 ERROR ReputMessageService - map file /data/services/rocketmq-all-4.2.0/data/store/consumequeue/BenchmarkTest/304/00000000000040200000 Failed. java.io.IOException: Map failed at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:940) ~[na:1.8.0_121] at org.apache.rocketmq.store.MappedFile.init(MappedFile.java:164) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.MappedFile.(MappedFile.java:73) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.MappedFileQueue.getLastMappedFile(MappedFileQueue.java:217) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.MappedFileQueue.getLastMappedFile(MappedFileQueue.java:237) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.ConsumeQueue.putMessagePositionInfo(ConsumeQueue.java:435) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.ConsumeQueue.putMessagePositionInfoWrapper(ConsumeQueue.java:397) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.DefaultMessageStore.putMessagePositionInfo(DefaultMessageStore.java:1371) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.DefaultMessageStore$CommitLogDispatcherBuildConsumeQueue.dispatch(DefaultMessageStore.java:1418) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.DefaultMessageStore.doDispatch(DefaultMessageStore.java:1365) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.DefaultMessageStore$ReputMessageService.doReput(DefaultMessageStore.java:1763) [rocketmq-store-4.2.0.jar:4.2.0] at org.apache.rocketmq.store.DefaultMessageStore$ReputMessageService.run(DefaultMessageStore.java:1818) [rocketmq-store-4.2.0.jar:4.2.0] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121] Caused by: java.lang.OutOfMemoryError: Map failed at sun.nio.ch.FileChannelImpl.map0(Native Method) ~[na:1.8.0_121] at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:937) ~[na:1.8.0_121] ... 12 common frames omitted

原提问者GitHub用户yujun777