此版本修复了2.9.0中的一些bug，包括一个严重的问题，即布尔查询可能无法检索到某些匹配文档。此外还进行了一些小的API更改，并强烈建议从2.9.0升级到2.9.1。为了确保升级到3.0时的兼容性，请确保代码在2.9.1下没有弃用警告。
This release fixes bugs from 2.9.0, including one serious bug whereby BooleanQuery could silently fail to retrieve certain matching documents.
There are also some minor API changes, including a Version parameter added to QueryParser and contrib Analyzers, so that version dependent defaults are consistent across classes, as well as un-deprecating of certain methods (we were too zealous in a few cases!).
Otherwise the changes are all bug fixes and documentation improvements.
This release is fully compatible with 2.9.0. We strongly recommend upgrading to 2.9.1 if you are using 2.9.0. Furthermore, because some additional APIs were deprecated in 2.9.1, to ensure a clean ("JAR drop in") upgrade to 3.0 you'll need to ensure your code compiles against 2.9.1 without deprecation warnings.
See CHANGES for details.
Binary and source distributions are available here.
Maven artifacts are available here.
There are also some minor API changes, including a Version parameter added to QueryParser and contrib Analyzers, so that version dependent defaults are consistent across classes, as well as un-deprecating of certain methods (we were too zealous in a few cases!).
Otherwise the changes are all bug fixes and documentation improvements.
This release is fully compatible with 2.9.0. We strongly recommend upgrading to 2.9.1 if you are using 2.9.0. Furthermore, because some additional APIs were deprecated in 2.9.1, to ensure a clean ("JAR drop in") upgrade to 3.0 you'll need to ensure your code compiles against 2.9.1 without deprecation warnings.
See CHANGES for details.
Binary and source distributions are available here.
Maven artifacts are available here.
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