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JRE Version Migration Guide If possible, use the same JRE major version at both index and search time. When upgrading to a different JRE major version, consider re-indexing. 尽量保证索引和查询时，使用相同的JRE版本，当

Apache Lucene - Index File Formats IntroductionDefinitions Inverted IndexingTypes of FieldsSegmentsDocument Numbers Index Structure OverviewFile NamingSummary of File Extens