Unable to bootstrap from [('localhost', 9092, 0)] on Windows: socket issues?

[ZmeiGorynych]

I've just installed kafka and zookeeper on Windows 10 Home based on instructions at https://dzone.com/articles/running-apache-kafka-on-windows-os, and as per that page tested it using
kafka-console-producer.bat --broker-list localhost:9092 --topic test
and
kafka-console-consumer.bat --zookeeper localhost:2181 --topic test
which work fine.

Unfortunately, when I try to use kafka-python from jupyter, I run into problems:

First, trying to call

from kafka import KafkaConsumer
consumer = KafkaConsumer(api_version=(0,10))

gave an error

ERROR:kafka.conn:Connection attempt to <BrokerConnection host=localhost/::1 port=9092> timed out
ERROR:kafka.client:Unable to bootstrap from [('localhost', 9092, 0)]

Thinking it was an IPv6 issue (kafka itself uses ipv4 in its terminal output), I tracked down in the code debugger the place where the ::1 appeared and hard-wired it to use 127.0.0.1 instead.

That merely switched the error to

ERROR:kafka.conn:Connection attempt to <BrokerConnection host=localhost/127.0.0.1 port=9092> timed out
ERROR:kafka.client:Unable to bootstrap from [('localhost', 9092, 0)]

Stepping through the code, I tracked the failure down to line 289 of conn.py
elif ret not in (errno.EINPROGRESS, errno.EALREADY, errno.EWOULDBLOCK, 10022)
In the original version (IPV6), the value of ret there is 10035 once and then alternates between 10035 (EWOULDBLOCK) and 10022 (WSAEINVAL), so 10035,10035,10022,10035,10022,10035,etc; if I force the address to 127.0.0.1, it is 10035 once, and then keeps repeating 10022.

Finally, if I try calling
producer = KafkaProducer(bootstrap_servers=['localhost:9092'],api_version=(0,10))
then in addition to the above error, I get
WARNING:kafka.conn:socket.inet_pton not available on this platform. consider pip install win_inet_pton
When I run pip install win_inet_pton and restart jupyter, that message doesn't go away.

Any idea what the matter could be?
Thanks a lot!

[ZmeiGorynych]

Update: adding import win_inet_pton to the top of conn.py fixed the last issue, but it's still unable to boostrap

[lateRunnr]

Any update on this issue? I am still facing it.

[siva5055]

I'm facing similar issue, when trying to produce from a cloud VM to a broker in private Network, ports 9092 and 2181 are made accessible to the VM and can check connection established.

But it throws

[Error 7] RequestTimedOutError: Request timed out after 30000 ms
ERROR:kafka.client:Unable to bootstrap from []

[scy245]

The problem seems to persist. I've installed kafka and zookeeper on Windows 10 Pro based on instructions at https://dzone.com/articles/running-apache-kafka-on-windows-os too and when I try to consume from a docker container, this error occurs:

Unable connect to "localhost:9092": Multiple exceptions: [Errno 111] Connection refused, [Errno 99] Address not available
Task exception was never retrieved
future: <Task finished coro=<task() done, defined at /app/rs_consumer/main.py:32> exception=ConnectionError("Unable to bootstrap from [('localhost', 9092, <AddressFamily.AF_UNSPEC: 0>)]")>
Traceback (most recent call last):
  File "/app/rs_consumer/main.py", line 34, in task
    await consumer.start()
  File "/usr/local/lib/python3.7/site-packages/aiokafka/consumer/consumer.py", line 336, in start
    yield from self._client.bootstrap()
  File "/usr/local/lib/python3.7/site-packages/aiokafka/client.py", line 228, in bootstrap
    'Unable to bootstrap from {}'.format(self.hosts))
kafka.errors.ConnectionError: ConnectionError: Unable to bootstrap from [('localhost', 9092, <AddressFamily.AF_UNSPEC: 0>)]

Any idea of what happens?