question

i had 5 connections to the database(sqlserver2012)among first 2 connections executed the connections and 3rd connection failed to execute the same query. 2016/04/28 20:03:39 普通: Creating statement Done 2016/04/28 20:03:39 普通: Executing query of Select COUNT(*) from metriclistinfo 2016/04/28 20:03:39 普通: Executing next function on ResultSet object 2016/04/28 20:03:39 普通: Returned no of rows8 2016/04/28 20:03:39 普通: Executing query ofSelect * from metriclistinfo 2016/04/28 20:03:39 普通: Data available in resultset2 : APPLICATIONIndex0 2016/04/28 20:03:39 普通: Data available in resultset2 : GLOBALIndex1 2016/04/28 20:03:39 普通: Data available in resultset2 : SYSDOWNTIMEIndex2 2016/04/28 20:03:39 普通: Data available in resultset2 : TRANSACTIONSIndex3 2016/04/28 20:03:39 普通: Data available in resultset2 : UPTIMEIndex4 2016/04/28 20:03:39 普通: Data available in resultset2 : VM_CONFIGIndex5 2016/04/28 20:03:39 普通: Data available in resultset2 : VM_GLOBALIndex6 2016/04/28 20:03:39 普通: Data available in resultset2 : VM_LOGICALIndex7 2016/04/28 20:03:39 普通: Creating statement Done 2016/04/28 20:03:39 普通: Executing query of Select COUNT(*) from metriclistinfo 2016/04/28 20:03:39 普通: Executing next function on ResultSet object 2016/04/28 20:03:39 普通: Returned no of rows8 2016/04/28 20:03:39 重大: Exception while getting metadata from source:Unknown data type:78