remove pool_pre_ping

@@ -16,8 +16,6 @@ from .models import UploadDocRecords, DocStatus, HILDoc, AFCDoc, PriorityApplica
 from .mixins import DocHandler
 from . import consts
 
-# Create your views here.
-
 
 # restframework将request.body封装至request.data, webargs从request.data中获取参数
 @parser.location_loader("data")

@@ -18,8 +18,7 @@ MYSQLPOOL_ARGUMENTS = {
     'pool_size': 64,
     'max_overflow': 10,
     'timeout': 5,
-    'use_threadlocal': True,
-    'pool_pre_ping': True,
+    'use_threadlocal': False,
 }