In the "+ Generate random datapoint" click event of http://localhost:3000/datastreams/

 Each child in an array or iterator should have a unique "key" prop. Check the render method of `Datastream`. See https://fb.me/react-warning-keys for more information.
    in div (at Datastream.js:33)
    in Datastream (created by Connect(Datastream))
    in Connect(Datastream) (created by Route)
    in Route (at App.js:26)
    in div (created by Container)
    in Container (at App.js:22)
    in div (at App.js:17)
    in App (at index.js:33)
    in Router (created by ConnectedRouter)
    in ConnectedRouter (at index.js:32)
    in Provider (at index.js:31)

and also the transaction fails with

POST http://localhost:9984/api/v1/transactions 400 (BAD REQUEST)

is this a known issue? I can help to fix this if needed.

After run 'docker-compose up ' , it throws:

bdb_1     |     'BigchainDB currently supports {}'.format(backend, BACKENDS.keys()))
bdb_1     | bigchaindb.common.exceptions.ConfigurationError: Backend `mongodb` is not supported. 

BigchainDB currently supports dict_keys(['localmongodb'])

docker logs below

$ docker logs 95
INFO:bigchaindb.config_utils:Cannot find config file /data/.bigchaindb.
[2019-01-10 07:39:54] [INFO] (bigchaindb.commands.bigchaindb) BigchainDB Version 2.0.0b9 (MainProcess - pid: 1)
[2019-01-10 07:39:54] [WARNING] (bigchaindb.backend.localmongodb.connection) Lost connection to the database, retrying query. (MainProcess - pid: 1)
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/bigchaindb/backend/localmongodb/connection.py", line 64, in run
return query.run(self.conn)
File "/usr/local/lib/python3.6/site-packages/bigchaindb/utils.py", line 176, in run
last = last(*item[0], **item[1])
File "/usr/local/lib/python3.6/site-packages/pymongo/collection.py", line 1262, in find_one
for result in cursor.limit(-1):
File "/usr/local/lib/python3.6/site-packages/pymongo/cursor.py", line 1189, in next
if len(self.__data) or self._refresh():
File "/usr/local/lib/python3.6/site-packages/pymongo/cursor.py", line 1104, in _refresh
self.__send_message(q)
File "/usr/local/lib/python3.6/site-packages/pymongo/cursor.py", line 982, in __send_message
helpers._check_command_response(first)
File "/usr/local/lib/python3.6/site-packages/pymongo/helpers.py", line 132, in _check_command_response
raise NotMasterError(errmsg, response)
pymongo.errors.NotMasterError: node is not in primary or recovering state

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/bigchaindb/backend/localmongodb/connection.py", line 68, in run
return query.run(self.conn)
File "/usr/local/lib/python3.6/site-packages/bigchaindb/utils.py", line 176, in run
last = last(*item[0], **item[1])
File "/usr/local/lib/python3.6/site-packages/pymongo/collection.py", line 1262, in find_one
for result in cursor.limit(-1):
File "/usr/local/lib/python3.6/site-packages/pymongo/cursor.py", line 1189, in next
if len(self.__data) or self._refresh():
File "/usr/local/lib/python3.6/site-packages/pymongo/cursor.py", line 1104, in _refresh
self.__send_message(q)
File "/usr/local/lib/python3.6/site-packages/pymongo/cursor.py", line 982, in __send_message
helpers._check_command_response(first)
File "/usr/local/lib/python3.6/site-packages/pymongo/helpers.py", line 132, in _check_command_response
raise NotMasterError(errmsg, response)
pymongo.errors.NotMasterError: node is not in primary or recovering state

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/bin/bigchaindb", line 11, in
load_entry_point('BigchainDB==2.0.0b9', 'console_scripts', 'bigchaindb')()
File "/usr/local/lib/python3.6/site-packages/bigchaindb/commands/bigchaindb.py", line 397, in main
utils.start(create_parser(), sys.argv[1:], globals())
File "/usr/local/lib/python3.6/site-packages/bigchaindb/commands/utils.py", line 137, in start
return func(args)
File "/usr/local/lib/python3.6/site-packages/bigchaindb/commands/utils.py", line 48, in configure
command(args)
File "/usr/local/lib/python3.6/site-packages/bigchaindb/commands/bigchaindb.py", line 283, in run_start
run_recover(bigchaindb.lib.BigchainDB())
File "/usr/local/lib/python3.6/site-packages/bigchaindb/commands/bigchaindb.py", line 272, in run_recover
rollback(b)
File "/usr/local/lib/python3.6/site-packages/bigchaindb/core.py", line 264, in rollback
pre_commit = b.get_pre_commit_state()
File "/usr/local/lib/python3.6/site-packages/bigchaindb/lib.py", line 448, in get_pre_commit_state
return backend.query.get_pre_commit_state(self.connection)
File "/usr/local/lib/python3.6/functools.py", line 807, in wrapper
return dispatch(args[0].class)(*args, **kw)
File "/usr/local/lib/python3.6/site-packages/bigchaindb/backend/localmongodb/query.py", line 272, in get_pre_commit_state
return conn.run(conn.collection('pre_commit').find_one())
File "/usr/local/lib/python3.6/site-packages/bigchaindb/backend/localmongodb/connection.py", line 70, in run
raise ConnectionError from exc
bigchaindb.backend.exceptions.ConnectionError