How to fix IndexNotFoundException: no segments* file found?
solr
Solution
As you can see from your log file Solr/Lucene can't find the segments file within the data directory.
If you remove the data directory, Solr will recreate a brand new index (empty, of course)automatically on startup. From the error it seems that your data directory is there, but with some file missing. Since I understood that you are willing to reindex everything, you can fix the error just deleting your index directory and then reindex.
Problem
I write my own code to index some data files myself. It was all working. Once I modified the `schema.xml` file, now i get internal server error that i have no idea how to interpret it. ``` Internal Server Error request: http://127.0.0.1:8080/solr/update?wt=javabin&version=2 at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:427) at org.apache.solr.client.solrj.impl.CommonsHttpSolrServer.request(CommonsHttpSolrServer.java:249) at org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:105) at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:69) at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:54) at solr.client.SolrClient.index(SolrClient.java:109) at solr.client.SolrClient.main(SolrClient.java:26) ``` Then I look into catalina log file, it's saying that no core created... ``` Jun 26, 2012 2:09:21 AM org.apache.solr.core.SolrCore close INFO: [] CLOSING SolrCore org.apache.solr.core.SolrCore@5675b3ee Jun 26, 2012 2:09:21 AM org.apache.solr.common.SolrException log SEVERE: java.lang.NullPointerException at org.apache.solr.core.SolrCore.close(SolrCore.java:712) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:599) at org.apache.solr.core.CoreContainer.create(CoreContainer.java:483) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:335) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:219) at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:161) at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:96) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4638) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5294) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:649) at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1585) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) 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:680) Jun 26, 2012 2:09:21 AM org.apache.solr.core.SolrCore closeSearcher INFO: [] Closing main searcher on request. Jun 26, 2012 2:09:21 AM org.apache.solr.common.SolrException log SEVERE: org.apache.solr.common.SolrException at org.apache.solr.core.SolrCore.<init>(SolrCore.java:600) at org.apache.solr.core.CoreContainer.create(CoreContainer.java:483) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:335) at org.apache.solr.core.CoreContainer.load(CoreContainer.java:219) at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:161) at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:96) at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:277) at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:258) at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382) at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103) at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4638) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5294) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:649) at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1585) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) 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:680) Caused by: java.lang.RuntimeException: org.apache.lucene.index.IndexNotFoundException: no segments* file found in org.apache.lucene.store.NIOFSDirectory@/Users/nan/solr-tomcat/solr/data/index lockFactory=org.apache.lucene.store.NativeFSLockFactory@11396ef7: files: [] at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1104) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:585) ... 23 more Caused by: org.apache.lucene.index.IndexNotFoundException: no segments* file found in org.apache.lucene.store.NIOFSDirectory@/Users/nan/solr-tomcat/solr/data/index lockFactory=org.apache.lucene.store.NativeFSLockFactory@11396ef7: files: [] at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:667) at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:72) at org.apache.lucene.index.IndexReader.open(IndexReader.java:375) at org.apache.solr.core.StandardIndexReaderFactory.newReader(StandardIndexReaderFactory.java:38) at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1093) ... 24 more ``` Updated catalina log file above...yes i removed the index data since i thought i am going to create new index...and i did this earlier today but i didnt see this kinda error until now...how should i fix this? :( Thanks a lot!!! (^infinitive times)