Lucene的索引不跨平臺

在windows上使用Lucene生成索引文件，將索引文件複製到Linux服務器上，報錯「校驗錯誤，多是硬件問題」。
因此，Lucene的跨平臺只是代碼跨平臺，生成的索引不跨平臺。

使用Java自帶的ObjectStream也是同樣，實際上並不跨平臺。

必定要學會使用日誌，重視日誌。
e.printStackTrace()默認把錯誤輸出到了標準錯誤流，因此在日誌文件中是看不見異常的。正確姿式是使用logger.error(String msg,Throwable e);
也能夠使用System.setErr()進行輸入輸出重定向，把信息打印到某個文件中去，可是，這種方式不如打印到日誌文件中好。日誌系統的設計考慮了不少，如今的日誌系統不只效率極高，並且格式化很好、很系統，便於分析找出錯誤。
三軍未動，糧草先行。要把日誌擺到頭等位置。

下面是異常詳情：

org.apache.lucene.index.CorruptIndexException: checksum failed (hardware problem?) : expected=58f3d50e actual=af1eb55c (resource=BufferedChecksumIndexInput(MMapIndexInput(path="/home/ubuntu/poem-index/poem/segments_2")))
    at org.apache.lucene.codecs.CodecUtil.checkFooter(CodecUtil.java:416)
    at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:400)
    at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:284)
    at org.apache.lucene.index.StandardDirectoryReader$1.doBody(StandardDirectoryReader.java:57)
    at org.apache.lucene.index.StandardDirectoryReader$1.doBody(StandardDirectoryReader.java:54)
    at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:685)
    at org.apache.lucene.index.StandardDirectoryReader.open(StandardDirectoryReader.java:77)
    at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:63)
    at data.model.PoemData.loadIndex(PoemData.java:27)
    at controller.MyApplication.init(MyApplication.java:47)
    at controller.MyApplication.configure(MyApplication.java:58)
    at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:119)
    at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:87)
    at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5178)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:724)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:700)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:952)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:473)
    at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1617)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
    at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1483)
    at org.apache.catalina.manager.HTMLManagerServlet.upload(HTMLManagerServlet.java:285)
    at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:206)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:136)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:586)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)