Question

我很熟悉这个错误，因此我将-- create the temporary table CREATE TABLE #CSVData ( IdValue int ) -- create a clustered index for this table (Note: this doesn't need to be unique) CREATE CLUSTERED INDEX IX_CSVData on #CSVData (IdValue ) -- insert the csv data to the table BULK INSERT #CSVData FROM 'c:\csvData.txt' WITH ( ROWTERMINATOR = ',' ) -- select the data SELECT T.* FROM table_name T INNER JOIN #CSVData ON(T.uId = IdValue) -- cleanup (the index will be dropped with the table) DROP TABLE #CSVData和interactive_timeout增加到X秒。因此，每当MySQL空闲超过X秒时，它就会重新连接（根据我的代码）。

以下是代码。

wait_timeout

filename.py

from filename import getconnection, DButil

CONNECTION = getconnection()

def user():
    try:
        global CONNECTION
        if CONNECTION is None:
            CONNECTION = getconnection()
    except Exception,e:
        print e


    dbutil = DButil(CONNECTION)

    try:
        dbutil.data_exist(loginfo)
    except Exception,e:
        print e

我得到的是连接正在进行并且是打开的，但当我CONNECTION = None def getconnection(recreate=True, db_name='db_name'): ''' Get a connection, if not available, make it ''' global CONNECTION if recreate or CONNECTION is None: if db_name == 'db_name': CONNECTION = makeconnection() return CONNECTION class DButil(object): '''Low level utiliity arrond db ''' def __init__(self, _connection): self.connection = _connection def data_exist(self,data_exist_query): with self.connection: print self.connection # <_mysql.connection open to '127.0.0.1' at 1a587b0> cur = self.connection.cursor() print cur # <MySQLdb.cursors.Cursor object at 0x1a22710> cur cur.execute(data_exist_query) rows = cur.fetchall() print rows # (2006, 'MySQL server has gone away') if len(rows) >= 1 : return True else : return False时，它会抛出rows = cur.fetchall()。为什么会出现这种行为？

当我重新连接时，即执行(2006, 'MySQL server has gone away')，它可以正常工作，MySQL连接再次建立。因为，当服务器空闲超过X秒时，我也再次创建了连接，但仍然会抛出错误。为什么？

Python - （2006，'MySQL服务器已经消失'）

0 个答案: