start_cluster = True, cluster = <cluster.Cluster object at 0x7fbd107e3650>

    @pytest.mark.timeout(300,func_only=True)
    def test_incremental(start_cluster,cluster):
        cluster.check_pbm_status()
        cluster.make_backup("incremental --base")
        pymongo.MongoClient(cluster.connection)["test"]["test"].insert_many(documents)
        backup = cluster.make_backup("incremental")
        result=pymongo.MongoClient(cluster.connection)["test"]["test"].delete_many({})
        assert int(result.deleted_count) == len(documents)
        cluster.upgrade()
        cluster.check_pbm_status()
        try:
            cluster.make_restore(backup,restart_cluster=True, check_pbm_status=True)
>           assert pymongo.MongoClient(cluster.connection)["test"]["test"].count_documents({}) == len(documents)

test_upgrade.py:89: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/lib/python3.11/site-packages/pymongo/collection.py:1915: in count_documents
    return self._retryable_non_cursor_read(_cmd, session)
/usr/lib/python3.11/site-packages/pymongo/collection.py:1925: in _retryable_non_cursor_read
    return client._retryable_read(func, self._read_preference_for(s), s)
/usr/lib/python3.11/site-packages/pymongo/_csot.py:108: in csot_wrapper
    return func(self, *args, **kwargs)
/usr/lib/python3.11/site-packages/pymongo/mongo_client.py:1535: in _retryable_read
    return func(session, server, conn, read_pref)
/usr/lib/python3.11/site-packages/pymongo/collection.py:1910: in _cmd
    result = self._aggregate_one_result(conn, read_preference, cmd, collation, session)
/usr/lib/python3.11/site-packages/pymongo/collection.py:1766: in _aggregate_one_result
    result = self._command(
/usr/lib/python3.11/site-packages/pymongo/collection.py:310: in _command
    return conn.command(
/usr/lib/python3.11/site-packages/pymongo/helpers.py:315: in inner
    return func(*args, **kwargs)
/usr/lib/python3.11/site-packages/pymongo/pool.py:960: in command
    self._raise_connection_failure(error)
/usr/lib/python3.11/site-packages/pymongo/pool.py:932: in command
    return command(
/usr/lib/python3.11/site-packages/pymongo/network.py:181: in command
    reply = receive_message(conn, request_id)
/usr/lib/python3.11/site-packages/pymongo/network.py:247: in receive_message
    length, _, response_to, op_code = _UNPACK_HEADER(_receive_data_on_socket(conn, 16, deadline))
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

conn = Connection(<socket.socket [closed] fd=-1, family=2, type=1, proto=6>) CLOSED at 140450002673424
length = 16, deadline = None

    def _receive_data_on_socket(conn: Connection, length: int, deadline: Optional[float]) -> memoryview:
        buf = bytearray(length)
        mv = memoryview(buf)
        bytes_read = 0
        while bytes_read < length:
            try:
                wait_for_read(conn, deadline)
                # CSOT: Update timeout. When the timeout has expired perform one
                # final non-blocking recv. This helps avoid spurious timeouts when
                # the response is actually already buffered on the client.
                if _csot.get_timeout() and deadline is not None:
                    conn.set_conn_timeout(max(deadline - time.monotonic(), 0))
>               chunk_length = conn.conn.recv_into(mv[bytes_read:])
E               Failed: Timeout >300.0s

/usr/lib/python3.11/site-packages/pymongo/network.py:328: Failed