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-30996: Streams operations over non-existent stream
文档解释ORA-30996:Streamsoperationsovernon-existentstreamCause:ThestreampassedisNULLorinvalid.Action:Checktheinputparameters.OTRA-30996:Streamsoperationsovernon-exi...
ORA-28509: unable to establish a connection to non-Oracle system
文档解释ORA-28509:unabletoestablishaconnectiontonon-OraclesystemCause:Initializationofadatabaselinktoanon-OraclesystemfailedtoconnecttotheHeterogeneousServicesagent...
ORA-42301: definition of an Editioning view may not refer to a synonym
文档解释ORA-42301:definitionofanEditioningviewmaynotrefertoasynonymCause:AnattemptwasmadetocreateanEditioningviewreferringtoasynonym,whichisnotsupported.Action:Dono...
ORA-24782: Cannot detach from a non-migratable transaction
文档解释ORA-24782:Cannotdetachfromanon-migratabletransactionCause:Anattemptwasmadetodetachfromanon-migrateabletransaction.Action:Eithercommitorrollbackthetransactio...