[英]python redis client fails to get existing hash values using .hgetall(key)
我遇到一種情況,當使用.hgetall(key)進行請求時,redis緩存的db2中一個明顯可知的哈希值消失了。 我希望獲得一些見識! 謝謝。
是的,所以...首先,一小段代碼:
def from_cache(self, cachekey):
""" pull oft needed material from our persistent redis memory cache, ensuring of course that we have a connection """
try:
log.debug('trying to get \'%s\' from cache' % cachekey)
return self.redis.hgetall(cachekey)
except Exception, e:
self.connect_to_cache()
return self.redis.get(cachekey)
導致:
2013-05-21 14:45:26,035 23202 DEBUG trying to get 'fax:1112223333' from cache
2013-05-21 14:45:26,036 23202 DEBUG initializing connection to redis/cache memory localhost, port 6379, db 2...
2013-05-21 14:45:26,039 23202 ERROR stopping with an exception
Traceback (most recent call last):
File "/usr/lib/python2.6/site-packages/simpledaemon/base.py", line 165, in start
self.run()
File "newgov.py", line 51, in run
if self.ready_for_queue(fax):
File "newgov.py", line 61, in ready_for_queue
if self.too_many_already_queued(fax):
File "newgov.py", line 116, in too_many_already_queued
rules = self.from_cache(key)
File "newgov.py", line 142, in from_cache
return self.redis.get(cachekey)
File "/usr/lib/python2.6/site-packages/redis/client.py", line 588, in get
return self.execute_command('GET', name)
File "/usr/lib/python2.6/site-packages/redis/client.py", line 378, in execute_command
return self.parse_response(connection, command_name, **options)
File "/usr/lib/python2.6/site-packages/redis/client.py", line 388, in parse_response
response = connection.read_response()
File "/usr/lib/python2.6/site-packages/redis/connection.py", line 309, in read_response
raise response
ResponseError: Operation against a key holding the wrong kind of value
這是redis中的內容:
$ redis-cli
redis 127.0.0.1:6379> SELECT 2
OK
redis 127.0.0.1:6379[2]> type fax:1112223333
hash
redis 127.0.0.1:6379[2]> hgetall fax:1112223333
1) "delay"
2) "0"
3) "concurrent"
4) "20"
5) "queued"
6) "20"
7) "exclude"
8) ""
查看您的Python堆棧跟蹤:“返回self.execute_command('GET',name)”失敗。 這意味着:
使用redis-cli,嘗試運行“ GET Fax:1112223333”,您將遇到相同的錯誤。
設置和設置時有不同類型的數據。 在hset中,您的值是哈希映射。 當您嘗試獲取哈希圖時,您將遇到相同的錯誤。 只需嘗試hgetall
和redis將返回哈希圖,或嘗試使用帶有cachekey和已設置哈希圖的任何鍵的hget並享受
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.