fix sleep time

@@ -185,6 +185,8 @@ class Command(BaseCommand, LoggerMixin):
         return img_il_list
 
     def handle(self, *args, **kwargs):
+        sleep_second = 5
+        max_sleep_second = 300
         while self.switch:
             # 从队列获取文件信息
             doc_info = self.get_doc_info()
@@ -192,7 +194,8 @@ class Command(BaseCommand, LoggerMixin):
             doc_data_path, excel_path, pdf_path, doc_id = self.pdf_download(doc_info)
             # 队列为空时的处理
             if pdf_path is None:
-                time.sleep(10)
+                time.sleep(sleep_second)
+                sleep_second = min(max_sleep_second, sleep_second+5)
                 continue
             try:
                 # PDF文件提取图片

@@ -41,7 +41,7 @@ def url_to_parts(url):
 
 class Redis:
 
-    def __init__(self, url, connection_pool=None, max_connections=None, socket_timeout=120,
+    def __init__(self, url, connection_pool=None, max_connections=10, socket_timeout=120,
                  retry_on_timeout=None, socket_connect_timeout=None):
         self._ConnectionPool = connection_pool
         scheme, host, port, _, password, path, query = url_to_parts(url)