openstack
/
oslo.cache
Code Issues Proposed changes

Add bug comment and fix nits 

Change-Id: Icb2b62d7d51cac652f9958ee094fef78a8ac9574
This commit is contained in:
Hervé Beraud 2021-01-25 19:19:04 +01:00
parent a437b219ac
commit e5d0b2019e
2 changed files with 6 additions and 7 deletions
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6
oslo_cache/core.py
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@ -140,9 +140,9 @@ def _build_cache_config(conf):
# backends. Use setdefault for url to support old-style setting through
# backend_argument=url:127.0.0.1:11211
#
# NOTE(morgan): Explicitly set flush_on_reconnect for pooled
# connections. This should ensure that stale data is never consumed
# from a server that pops in/out due to a network partition
# NOTE(morgan): If requested by config, 'flush_on_reconnect' will be set
# for pooled connections. This can ensure that stale data is never
# consumed from a server that pops in/out due to a network partition
# or disconnect.
#
# See the help from python-memcached:

7
releasenotes/notes/bug-1888394-5a53e7a9cb25375b.yaml
View File

@ -7,16 +7,15 @@ fixes:
possible that the server will contain stale data. To avoid this, param
flush_on_reconnect was used in code.
But unfortunatelly this option is causing another issue.
But unfortunately this option is causing another issue.
If memcache server disappears, or client had broken connection to memcache server,
clients start to flush server on reconnect.
This means that network connections will go UP and can cause server to be overloaded
until memcache will be unresponsive.
Simply said this option can cause loop of flushs and overloaded memcached servers.
This change is moving optional parameter `flush_on_reconnect` to oslo.cache config.
Simply said this option can cause loops of flushes and overloaded memcached servers.
This change is moving optional parameter ``flush_on_reconnect`` to oslo.cache config.
features:
- Configuration option ``memcache_pool_flush_on_reconnect`` added to control
if flush will be sent to memcached server after reconnect.