Remove idle connections from pool (#309)

The Memcached server can be configured to drop idle connections (via the
idle_timeout option). When this occurs, pymemcache may still try to
use the connection, resulting in MemcacheUnexpectedCloseError. Hence
the need for client-side idle timeout logic.

1 files changed, 5 insertions, 0 deletions

diff --git a/pymemcache/client/base.py b/pymemcache/client/base.py
index 4db03b8..a0816cf 100644
--- a/pymemcache/client/base.py
+++ b/pymemcache/client/base.py
@@ -1039,6 +1039,9 @@ class PooledClient(object):
       max_pool_size: maximum pool size to use (going above this amount
                      triggers a runtime error), by default this is 2147483648L
                      when not provided (or none).
+      pool_idle_timeout: pooled connections are discarded if they have been
+                         unused for this many seconds. A value of 0 indicates
+                         that pooled connections are never discarded.
       lock_generator: a callback/type that takes no arguments that will
                       be called to create a lock or semaphore that can
                       protect the pool from concurrent access (for example a
@@ -1065,6 +1068,7 @@ class PooledClient(object):
                  socket_module=socket,
                  key_prefix=b'',
                  max_pool_size=None,
+                 pool_idle_timeout=0,
                  lock_generator=None,
                  default_noreply=True,
                  allow_unicode_keys=False,
@@ -1088,6 +1092,7 @@ class PooledClient(object):
             self._create_client,
             after_remove=lambda client: client.close(),
             max_size=max_pool_size,
+            idle_timeout=pool_idle_timeout,
             lock_generator=lock_generator)
         self.encoding = encoding
         self.tls_context = tls_context