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awesomized / libmemcached

Resurrection of libmemcached
https://awesomized.github.io/libmemcached/
BSD 3-Clause "New" or "Revised" License
45 stars 26 forks source link

num_replicas works when server goes down but not when it comes back up #64

Closed m6w6 closed 4 years ago

m6w6 commented 4 years ago

Imported from Launchpad using lp2gh.

I'm using pylibmc but I think this is just a wrapper for functionality in libmemcached.

The situation is:

  1. create a connection with num_replicas:1 on two servers (server_1, server_2)
  2. add a key to this connection (note the this connection does show this new value, server_1 directly does not, server_2 directly does)
  3. stop server_2
  4. check the main connection for the key. Connection error received.
  5. check the main connection again for the key, key is found so replicas did work (checking server_1 directly also shows the key)

-- all good so far --

Now, bring back up server_2. check the main connection for the key. Not found! check server_2 directly for the key, not found. check server_1 directly for the key, found!

It seems to me that in this situation, the main connection should find the key still, regardless of server_2 coming back up. I am imagining situations where people have an autostart in case the service goes down.

m6w6 commented 4 years ago

See also #21