Traceback (most recent call last):
  File "/home/zulip/deployments/2020-01-26-16-04-35/zulip-py3-venv/lib/python3.6/site-packages/django_pylibmc/memcached.py", line 130, in get
    return super(PyLibMCCache, self).get(key, default, version)  File "/home/zulip/deployments/2020-01-26-16-04-35/zulip-py3-venv/lib/python3.6/site-packages/django/core/cache/backends/memcached.py", line 79, in get
    val = self._cache.get(key)pylibmc.ServerDown: error 47 from memcached_get(:1:RLF_TEST_KEY): (0x2e1f3b0) SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY,  host: 127.0.0.1:11211 -> libmemcached/connect.cc:7202020-01-26 16:05:14.018 ERR  [django.pylibmc] MemcachedError: error 47 from memcached_delete(:1:86668db259e54bdba09d69554cd0c): (0x2e1f3b0) SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY,  host: 127.0.0.1:11211 -> libmemcached/connect.cc:720
Traceback (most recent call last):  File "/home/zulip/deployments/2020-01-26-16-04-35/zulip-py3-venv/lib/python3.6/site-packages/django_pylibmc/memcached.py", line 172, in delete_many
    return super(PyLibMCCache, self).delete_many(*args, **kwargs)  File "/home/zulip/deployments/2020-01-26-16-04-35/zulip-py3-venv/lib/python3.6/site-packages/django/core/cache/backends/memcached.py", line 153, in delete_many
    self._cache.delete_multi(self.make_key(key, version=version) for key in keys)pylibmc.ServerDown: error 47 from memcached_delete(:1:86668db259e54bdba09d69554cd0c): (0x2e1f3b0) SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY,  host: 127.0.0.1:11211 -> libmemcached/connect.cc:720