A sentence is run multiple times, and different errors appear

Question

Run multiple times without modifying any line of code
cursor.execute(sql2)
1.AttributeError 'NoneType' object has no attribute 'read'
2.IndexError index out of range
3.AttributeError 'NoneType' object has no attribute 'settimeout'
4.AssertionError Protocol error, expecting EOF
5.OperationalError (2014, 'Command Out of Sync')
6.InternalError Packet sequence number wrong - got 1 expected 2
7.OSError [Errno 9] Bad file descriptor
.......

def getPosition(connect,ID):                                                       
    lock = threading.Lock()
    
    sql2 = "SELECT district,region,community FROM Position WHERE ID = {0};".format(ID)
    lock.acquire()
    cursor = connect.cursor()
    connect.ping(reconnect=True)
    cursor.execute(sql2)                         #the setnece 
    
   
    ans = ""
    try:
        l = cursor.fetchone()
        ans = l[0]+l[1]+l[2]
    except Exception:
        return False
    finally:
        lock.release()
    return ans

I use the producer-consumer model to connect to the mysql database through pymysql