Druid 0.2.21 发布了，该版本主要改进内容有：
[DRUID-261] - OracleExceptionSorter识别ORA-17401错误
[DRUID-262] - OracleExceptionSorter支持动态配置errorCode
[DRUID-264] - 减少内存占用
[DRUID-265] - MySqlValidConnectionChecker支持禁用ping方法检测
[DRUID-266] - DruidDataSourceStatLoggerImpl支持配置logger
[DRUID-267] - 优化pooledPreparedStatements关闭时的性能
[DRUID-268] - 降低SQL拦截误报率
[DRUID-269] - MySqlExceptionSorter支持Oceanbase
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0.2.21的快照地址：
http://code.alibabatech.com/mvn/snapshots/com/alibaba/druid/0.2.21-SNAPSHOT/
来自:开源中国社区
