lucene RAMDirectory org.apache.lucene.index.IndexNotFoundException

wendu

　　lucene   RAMDirectory org.apache.lucene.index.IndexNotFoundException
　　今天在使用lucene的时候遇见这个异常:
　　org.apache.lucene.index.IndexNotFoundException: no segments* file found in  org.apache.lucene.store.RAMDirectory@149b290 lockFactory=org.apache.lucene.store.SingleInstanceLockFactory@16a38b5: files: []
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:712)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:75)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:462)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:322)
at org.apache.lucene.search.IndexSearcher.<init>(IndexSearcher.java:93)
at service.IndexServiceImpl.searchByboolean(IndexServiceImpl.java:136)
at service.IndexServiceImpl.byBooleanQueryFromM(IndexServiceImpl.java:107)
at test.IndexTest.testIndexCreateImMAndSearch(IndexTest.java:116)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)





其实问题很简单....  (但是百度,谷歌却没定点痕迹 告诉我怎么做...)

这里是创建内存索引的地方:

writer = new IndexWriter(new RAMDirectory (), indexConfig);
 

实例化一个IndexWriter.. 其中的RAMDirectory  是新实例化的:




好.在读取内存索引的语句是:

searcher = new IndexSearcher( new  RAMDirectory());
 

注意:这里产生了两个 RAMDirectory ..就是这里出现的问题...





解决方法很简单,用单例模式,保证是同一个引用就好:

ramDir = IndexFactroy.getRAMDirtoryInstance();
writer = new IndexWriter(ramDir , indexConfig);