Mysql---SQLException: Prepared statement needs to be re-prepared raised in Connection_executeQuery

在使用Mysql的过程中，出现一下问题：SQLException: Prepared statement needs to be re-prepared
 raised in Connection_executeQuery at src/db/Connection.c:319

通过分析和查阅资料，最终定位原因是mysql的table_open_cache太小导致，实际的table_open_cahce如下如，mysql默认的table_open_cache=64，可以通过设置：mysql> set global table_open_cache=2048