在Lucene中，关闭一个IndexWriter时抛出AlreadyClosedException异常：
D:\java\JDK8\JDK\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 -javaagent:D:\IDEA\lib\idea_rt.jar=50120:D:\IDEA\bin -Dfile.encoding=UTF-8 -classpath D:\IDEA\lib\idea_rt.jar;D:\IDEA\plugins\junit\lib\junit-rt.jar;D:\IDEA\plugins\junit\lib\junit5-rt.jar;D:\java\JDK8\JDK\jre\lib\charsets.jar;D:\java\JDK8\JDK\jre\lib\deploy.jar;D:\java\JDK8\JDK\jre\lib\ext\access-bridge-64.jar;D:\java\JDK8\JDK\jre\lib\ext\cldrdata.jar;D:\java\JDK8\JDK\jre\lib\ext\dnsns.jar;D:\java\JDK8\JDK\jre\lib\ext\jaccess.jar;D:\java\JDK8\JDK\jre\lib\ext\jfxrt.jar;D:\java\JDK8\JDK\jre\lib\ext\localedata.jar;D:\java\JDK8\JDK\jre\lib\ext\nashorn.jar;D:\java\JDK8\JDK\jre\lib\ext\sunec.jar;D:\java\JDK8\JDK\jre\lib\ext\sunjce_provider.jar;D:\java\JDK8\JDK\jre\lib\ext\sunmscapi.jar;D:\java\JDK8\JDK\jre\lib\ext\sunpkcs11.jar;D:\java\JDK8\JDK\jre\lib\ext\zipfs.jar;D:\java\JDK8\JDK\jre\lib\javaws.jar;D:\java\JDK8\JDK\jre\lib\jce.jar;D:\java\JDK8\JDK\jre\lib\jfr.jar;D:\java\JDK8\JDK\jre\lib\jfxswt.jar;D:\java\JDK8\JDK\jre\lib\jsse.jar;D:\java\JDK8\JDK\jre\lib\management-agent.jar;D:\java\JDK8\JDK\jre\lib\plugin.jar;D:\java\JDK8\JDK\jre\lib\resources.jar;D:\java\JDK8\JDK\jre\lib\rt.jar;D:\Javautils\Usertestrootguangl\lucene1\target\test-classes;D:\Javautils\Usertestrootguangl\lucene1\target\classes;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-core\6.6.1\lucene-core-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-queryparser\6.6.1\lucene-queryparser-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-queries\6.6.1\lucene-queries-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-sandbox\6.6.1\lucene-sandbox-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-analyzers-common\6.6.1\lucene-analyzers-common-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-analyzers-smartcn\6.6.1\lucene-analyzers-smartcn-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-highlighter\6.6.1\lucene-highlighter-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-join\6.6.1\lucene-join-6.6.1.jar;D:\Javautils\Meven\repository\repository\org\apache\lucene\lucene-memory\6.6.1\lucene-memory-6.6.1.jar;D:\Javautils\Meven\repository\repository\com\janeluo\ikanalyzer\2012_u6\ikanalyzer-2012_u6.jar;D:\Javautils\Meven\repository\repository\junit\junit\4.12\junit-4.12.jar;D:\Javautils\Meven\repository\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 -junit4 luncene.LuceneTest,testCrestIndex
org.apache.lucene.store.AlreadyClosedException: this Directory is closed
at org.apache.lucene.store.BaseDirectory.ensureOpen(BaseDirectory.java:51)
at org.apache.lucene.store.FSDirectory.createOutput(FSDirectory.java:248)
at org.apache.lucene.store.LockValidatingDirectoryWrapper.createOutput(LockValidatingDirectoryWrapper.java:44)
at org.apache.lucene.store.TrackingDirectoryWrapper.createOutput(TrackingDirectoryWrapper.java:43)
at org.apache.lucene.codecs.lucene53.Lucene53NormsConsumer.<init>(Lucene53NormsConsumer.java:43)
at org.apache.lucene.codecs.lucene53.Lucene53NormsFormat.normsConsumer(Lucene53NormsFormat.java:77)
at org.apache.lucene.index.DefaultIndexingChain.writeNorms(DefaultIndexingChain.java:299)
at org.apache.lucene.index.DefaultIndexingChain.flush(DefaultIndexingChain.java:136)
at org.apache.lucene.index.DocumentsWriterPerThread.flush(DocumentsWriterPerThread.java:444)
at org.apache.lucene.index.DocumentsWriter.doFlush(DocumentsWriter.java:539)
at org.apache.lucene.index.DocumentsWriter.flushAllThreads(DocumentsWriter.java:653)
at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3401)
at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3376)
at org.apache.lucene.index.IndexWriter.shutdown(IndexWriter.java:1126)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1171)
at luncene.LuceneTest.testCrestIndex(LuceneTest.java:42)
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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Process finished with exit code -1
一定要注意 顺序的位置------->感谢---->http://www.hankcs.com/program/java/solve-org-apache-lucene-store-alreadyclosedexception-this-directory-is-closed.html
IndexWriter依赖于一个Directory，当Directory关闭的时候，IndexWriter也就随之关闭了。所以正确的关闭顺序是
-
先关闭IndexWriter
-
后关闭Directory