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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6663) Connecting to a Raspberry PI Cassandra Cluster crashes the node being connected to
Date Thu, 06 Feb 2014 12:24:09 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13893306#comment-13893306
] 

Benedict commented on CASSANDRA-6663:
-------------------------------------

I'm not sure if that edit was supposed to be in answer to Brandon or not, but it didn't answer
his question. You will need to look at the Cassandra system.log on the Raspberry Pi at 192.168.200.151.

> Connecting to a Raspberry PI Cassandra Cluster crashes the node being connected to
> ----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6663
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6663
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Drivers (now out of tree)
>         Environment: 4x node Raspberry PI cluster
> Macbook running Idle 2.7
>            Reporter: ian mccrae
>
> I have a working 4x node Raspberry Pi cluster and
> # DevCenter happily connects to this (...which has an option to turn Snappy compression
off)
> # ...however the Python Driver fails to connect and crashes the node being connected
to with the errors in the error-log below.
> There appears to be a problem with Snappy compression (not supported on the Raspberry
Pi).  So I also tried "compression = None" with the same result.
> How might I fix this?
> *Python Code*
> >>> from cassandra.cluster import Cluster
> >>> cluster = Cluster(['192.168.200.151'], compression = None)
> >>> session = cluster.connect()
> *Error Log*
> {quote}
> Traceback (most recent call last):
>   File "<pyshell#58>", line 1, in <module>
>     session = cluster.connect()
>   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cassandra/cluster.py",
line 471, in connect
>     self.control_connection.connect()
>   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cassandra/cluster.py",
line 1351, in connect
>     self._set_new_connection(self._reconnect_internal())
>   File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/cassandra/cluster.py",
line 1386, in _reconnect_internal
>     raise NoHostAvailable("Unable to connect to any servers", errors)
> NoHostAvailable: ('Unable to connect to any servers', {'192.168.200.151': ConnectionShutdown('Connection
to 192.168.200.151 is closed',))
> {quote}
> *A Dump of the "cluster" class attributes*
> {quote}
> >>> pprint(vars(cluster))
> {'_core_connections_per_host': {0: 2, 1: 1},
>  '_is_setup': True,
>  '_is_shutdown': True,
>  '_listener_lock': <thread.lock object at 0x10616d230>,
>  '_listeners': set([]),
>  '_lock': <_RLock owner=None count=0>,
>  '_max_connections_per_host': {0: 8, 1: 2},
>  '_max_requests_per_connection': {0: 100, 1: 100},
>  '_min_requests_per_connection': {0: 5, 1: 5},
>  '_prepared_statements': <WeakValueDictionary at 4396942904>,
>  'compression': None,
>  'contact_points': ['192.168.200.151'],
>  'control_connection': <cassandra.cluster.ControlConnection object at 0x106168cd0>,
>  'control_connection_timeout': 2.0,
>  'cql_version': None,
>  'executor': <concurrent.futures.thread.ThreadPoolExecutor object at 0x106148410>,
>  'load_balancing_policy': <cassandra.policies.RoundRobinPolicy object at 0x104adae50>,
>  'max_schema_agreement_wait': 10,
>  'metadata': <cassandra.metadata.Metadata object at 0x1061481d0>,
>  'metrics_enabled': False,
>  'port': 9042,
>  'scheduler': <cassandra.cluster._Scheduler object at 0x106148550>,
>  'sessions': <_weakrefset.WeakSet object at 0x106148750>,
>  'sockopts': None,
>  'ssl_options': None}
> >>>
> {quote}



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