diff --git a/dbpool.go b/dbpool.go
index 4436ce8..3c5718c 100644
--- a/dbpool.go
+++ b/dbpool.go
@@ -419,6 +419,9 @@ func (this *dbPool) internalQuery(dataSource string, sql string, params []string
 	}
 	rows, err := ds.conn.Query(sql, q5.ToInterfaces(params)...)
 	this.returnConn(ds)
+	if err != nil {
+		GetSysLog().Warning("f5.dbpool.internalQuery error:%s sql:%s", err, sql)
+	}
 
 	if this.style == GO_STYLE_DB {
 		cb(err, NewDataSet(rows))
@@ -439,6 +442,9 @@ func (this *dbPool) internalQueryNoMainThread(dataSource string, sql string, par
 	}
 	rows, err := ds.conn.Query(sql, q5.ToInterfaces(params)...)
 	this.returnConn(ds)
+	if err != nil {
+		GetSysLog().Warning("f5.dbpool.internalQueryNoMainThread error:%s sql:%s", err, sql)
+	}
 
 	cb(err, NewDataSet(rows))
 }
@@ -452,6 +458,9 @@ func (this *dbPool) internalQueryOne(dataSource string, sql string, params []str
 	}
 	rows, err := ds.conn.Query(sql, q5.ToInterfaces(params)...)
 	this.returnConn(ds)
+	if err != nil {
+		GetSysLog().Warning("f5.dbpool.internalQueryOne error:%s sql:%s", err, sql)
+	}
 
 	var dataSet *DataSet
 	if err == nil {