com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: Too many connections
最简单的办法是因为你的my.ini中设定的并发连接数太少或者系统繁忙导致连接数被占满解决方式：打开MySQL安装目录打开MY.INI找到max_connections默认是100.--实例WINDOWS解决mysql Errno.:1040错误XXXXinfo:CannotconnecttoMySQLserv...
ORA-30678: too many open connections
文档解释ORA-30678:toomanyopenconnectionsCause:Anattempttoopenaconnectionfailedbecausetoomanyarealreadyopenbythissession.Thenumberofallowedconnectionsvariesassomemay...
ORA-44827: Number of Performance Classes is too large
文档解释ORA-44827:NumberofPerformanceClassesistoolargeCause:Alargenumber(>=50)ofPerformanceClasseswererequested.Action:Submitasmaller(ORA-44827：表示性能类的数量太多。官方解释OR...
ORA-55379: too many triples
文档解释ORA-55379:toomanytriplesCause:Aninternalerroroccurredduringvalidation.Toomanytripleswerepassedin.Action:Specifyavalidnumberoftriplesfortheoperation,orcontac...
ORA-29372: identifier string is too long; it must be less than string characters
文档解释ORA-29372:identifierstringistoolong;itmustbelessthanstringcharactersCause:Anattemptwasmadetospecifyanidentifierthatismorethan30characterslong.Action:Useanid...