Add pymongo.server_api.ServerApi and the MongoClient server_api option.
Support Unified Test Format version 1.1 (serverParameters in
runOnRequirements)
Skip dropRole tests due to SERVER-53499.
Mark server unknown and clear the pool when background connections fail.
Eagerly evict threads from the wait queue when pool is paused. Evicted
threads will raise the following error:
AutoReconnect('localhost:27017: connection pool paused')
Introduce PoolClearedEvent and ConnectionPoolListener.pool_ready.
CMAP spec test changes:
- CMAP unit tests should not use real monitors
- Assert that CMAP threads complete all scheduled operations
At most 2 connections can be in the pending state per connection pool.
The pending state covers all the work required to setup a new connection
including TCP, TLS, and MongoDB authentication. For example, if two
threads are currently creating connections, a third thread will wait for
either an existing connection to be checked back into the pool or for
one of the two threads to finish creating a connection.
The change reduces the likelihood of connection storms and improves the
driver's ability to reuse existing connections.
Fix DeprecationWarning: PY_SSIZE_T_CLEAN will be required for '#' formats
Fix DeprecationWarning: isAlive() is deprecated, use is_alive() instead
Fix SyntaxWarning: invalid escape sequence
Test Python 3.8 on Travis
Each Pool guards its poll.poll with a mutex to prevent concurrent calls.
poll and select are retried if they are interrupted with EINTR. Also fixes
PYTHON-1179.
SocketInfo and Pool are now responsible for catching all socket.errors and
gaierrors and translating them to ConnectionFailure. Server and MongoClient
need no longer worry about anything but ConnectionFailure. Functions in pool.py
and network.py still throw socket.errors into SocketInfo and Pool.
With this change the max_pool_size named parameter to
MongoClient is removed. It is replaced by the maxPoolSize
MongoDB URI option, which can be passed in a URI, or as a
keyword argument to MongoClient.
Call ismaster on each new connection and store the results on the SocketInfo
instance.
The upcoming Authentication Spec says: "If credentials exist, upon opening a
socket, drivers MUST send an isMaster command immediately. This allows a driver
to determine whether the server is an Arbiter. Calling ismaster additionally
allows the driver to know if the default authentication method for each socket
is MONGODB-CR or SCRAM-SHA-1, avoiding races when the driver repopulates the
pool after a disconnect."
In theory we could choose not to call ismaster if there are no credentials, but
it's simpler always to call ismaster, and paves the way for future breaking
changes to the wire protocol besides the current breaking change to
authentication.
