hazelcast-python-client with python 3.4

[india...@gmail.com]

Hi,

I tried hazelcast-python-client with python 3.4.  I know docs says its ready for 2.7 on my machine I think pip install put it into 3.4.

I tried simple program below and it gave error.

import hazelcast

config = hazelcast.ClientConfig()

# Hazelcast.Address is the hostname or IP address, e.g. 'localhost:5701'

config.network_config.addresses.append('10.135.128.100')

client = hazelcast.HazelcastClient(config)

Traceback (most recent call last):

  File "hz.py", line 1, in <module>

    import hazelcast

  File "/usr/lib/python3.4/site-packages/hazelcast/__init__.py", line 1, in <module>

    from hazelcast.client import HazelcastClient

  File "/usr/lib/python3.4/site-packages/hazelcast/client.py", line 2, in <module>

    from hazelcast.cluster import ClusterService, RandomLoadBalancer

  File "/usr/lib/python3.4/site-packages/hazelcast/cluster.py", line 8, in <module>

    from hazelcast.invocation import ListenerInvocation

  File "/usr/lib/python3.4/site-packages/hazelcast/invocation.py", line 4, in <module>

    from Queue import Queue

ImportError: No module named 'Queue'

[india...@gmail.com]

I now installed on python2 and it seems to atleast run but it kind of shows no output.  It complain like "No handlers could be found for logger "Reactor"" and then its stuck.  I cannot even terminate the process.

[Asim Arslan]

Hi,

Please setup python logging to see why it is not connecting with

logging.basicConfig()
# logging.basicConfig(format='%(asctime)s%(msecs)03d [%(name)s] %(levelname)s: %(message)s', datefmt="%H:%M%:%S,")
logging.getLogger().setLevel(logging.INFO)

config = hazelcast.ClientConfig()
# Hazelcast.Address is the hostname or IP address, e.g. 'localhost:5701'

config.network_config.addresses.append('127.0.0.1:5701')
client = hazelcast.HazelcastClient(config)

And also please configure the ip and port of hazelcast server not just ip.

Asım Arslan
Clients Team Lead 
Mahir İz Cad. No:35, Altunizade, İstanbul 
as...@hazelcast.com

@asimarslan

skype: asimarslan

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[india...@gmail.com]

Hi,

Here are debug logs:

$ python2 hz.py

DEBUG:LifecycleService:New Lifecycle state is STARTING

DEBUG:Reactor:Starting Reactor Thread

INFO:ClusterService:Connecting to Address(host=10.135.128.100, port=5701)

DEBUG:InvocationService:Sending ClientMessage:{length=60, correlationId=1, messageType=2, partitionId=-1, isComplete=False, isRetryable=True, isEvent=False, writeOffset=22} to Connection(address=('10.135.128.100', 5701), id=0)

DEBUG:Connection[0](10.135.128.100:5701):Connected to ('10.135.128.100', 5701)

DEBUG:ConnectionManager:Error opening Connection(address=('10.135.128.100', 5701), id=0)

ERROR:Reactor:Error in Reactor Thread

Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/reactor.py", line 38, in _loop

    self._check_timers()

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/reactor.py", line 57, in _check_timers

    self._timers.get_nowait()

  File "/usr/lib/python2.7/Queue.py", line 190, in get_nowait

    return self.get(False)

  File "/usr/lib/python2.7/Queue.py", line 165, in get

    raise Empty

Empty

WARNING:ClusterService:Error connecting to Address(host=10.135.128.100, port=5701), attempt 1 of 4, trying again in 3 seconds

Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/cluster.py", line 81, in _connect_to_cluster

    self._connect_to_address(address)

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/cluster.py", line 111, in _connect_to_address

    connection = self._client.connection_manager.get_or_connect(address, self._authenticate_manager).result()

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/future.py", line 105, in callback

    future.set_result(continuation_func(f, *args))

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/future.py", line 105, in callback

    future.set_result(continuation_func(f, *args))

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/cluster.py", line 99, in callback

    parameters = client_authentication_codec.decode_response(f.result())

  File "/usr/lib/python2.7/site-packages/hazelcast_python_client-0.3-py2.7.egg/hazelcast/future.py", line 42, in result

    raise self._exception, None, self._traceback

TimeoutError: Request timed out after 120 seconds.

INFO:ClusterService:Connecting to Address(host=10.135.128.100, port=5701)

DEBUG:InvocationService:Sending ClientMessage:{length=60, correlationId=2, messageType=2, partitionId=-1, isComplete=False, isRetryable=True, isEvent=False, writeOffset=22} to Connection(address=('10.135.128.100', 5701), id=1)

Here is script where I tried adding group_config but it makes no difference:

import hazelcast

import logging

logging.basicConfig()

logging.getLogger().setLevel(logging.DEBUG)

config = hazelcast.ClientConfig()

# Hazelcast.Address is the hostname or IP address, e.g. 'localhost:5701'

config.network_config.addresses.append('10.135.128.100:5701')

config.group_config.name = "dev1"

config.group_config.password = "password"

client = hazelcast.HazelcastClient(config)

In the config on Node at 10.135.100.128 there is mention of cluster name and password so I tried to add them.

[Asim Arslan]

Hi Miten,

Can you validate your Hazelcast Cluster runs 3.6 or above. Hazelcast Python client supports Hazelcast 3.6+

Asım Arslan
Clients Team Lead 
Mahir İz Cad. No:35, Altunizade, İstanbul 
as...@hazelcast.com

@asimarslan

skype: asimarslan

To view this discussion on the web visit https://groups.google.com/d/msgid/hazelcast/0486617e-3d61-4cc3-83e1-eaa77c233913%40googlegroups.com.

[india...@gmail.com]

Hi Asim,

We are using 3.5.  I guess that is reason for this observation.  Sorry about not noticing this in first place.

Regards,

Miten.

[jma...@gmail.com]

Hi am getting the same error but am using 3.6.4 hazelcast any pointers

[Asim Arslan]

Can you update your client config to point to hazelcast server ip and port (or validate it is correct).

Asım Arslan
Clients Team Lead 
Mahir İz Cad. No:35, Altunizade, İstanbul 
as...@hazelcast.com

@asimarslan

skype: asimarslan

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