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https://issues.apache.org/jira/browse/CASSANDRA-8001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15828846#comment-15828846
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Russell Razoy commented on CASSANDRA-8001:
------------------------------------------

I ran into the same issue, although slightly different symptoms.
*TLRD:  Besides brew uninstalling and installing cassandra, I had to run this 
command:*
{code}brew link --overwrite cassandra{code}


Long version:
1. My python installation broke, so reinstalled it through brew, and 
reinstalled all modules through pip (cql included).
2. When connecting to remote cqlsh server, I would get this error:
{code}
Connection error: ('Unable to connect to any servers', {'17.169.33.31': 
DriverException('ProtocolError returned from server while using explicitly set 
client protocol_version 4',)})
{code}
3. Using --cqlshversion=4.x.x parameter on cqlsh command wouldn't work
4.  Forced pip install cqlsh==4.x.x and would get similar error to the one on 
your stacktrace:
{code}
Traceback (most recent call last):
  File "/usr/local/bin/cqlsh", line 2031, in <module>
    main(*read_options(sys.argv[1:], os.environ))
  File "/usr/local/bin/cqlsh", line 2017, in main
    display_float_precision=options.float_precision)
  File "/usr/local/bin/cqlsh", line 477, in __init__
    cql_version=cqlver, transport=transport)
  File "/usr/local/lib/python2.7/site-packages/cql/connection.py", line 143, in 
connect
    consistency_level=consistency_level, transport=transport)
  File "/usr/local/lib/python2.7/site-packages/cql/connection.py", line 59, in 
__init__
    self.establish_connection()
  File "/usr/local/lib/python2.7/site-packages/cql/thrifteries.py", line 157, 
in establish_connection
    self.client.login(AuthenticationRequest(credentials=self.credentials))
  File "/usr/local/lib/python2.7/site-packages/cql/cassandra/Cassandra.py", 
line 454, in login
    self.send_login(auth_request)
  File "/usr/local/lib/python2.7/site-packages/cql/cassandra/Cassandra.py", 
line 461, in send_login
    args.write(self._oprot)
  File "/usr/local/lib/python2.7/site-packages/cql/cassandra/Cassandra.py", 
line 2769, in write
    oprot.trans.write(fastbinary.encode_binary(self, (self.__class__, 
self.thrift_spec)))
TypeError: expecting 5 arguments for typeargs to map
{code}

Solution mentioned above worked like a charm, now I can run this successfully:
{code}
cqlsh <host> -u <user> -p <pass> --cqlversion=3.2.1
{code}

> CQLSH broken in Mac OS 10.9.5
> -----------------------------
>
>                 Key: CASSANDRA-8001
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8001
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Mac OS 10.9.5, homebrew python 2.7, cql 4.1.1
>            Reporter: Jonathan Hoskin
>              Labels: cqlsh
>
> Since upgrading to Mac OS 10.9.5, cqlsh has stopped working.
> Here is the error trace I get:
> {quote}
> $ cqlsh -u USER -k KEYSPACE HOST
> Traceback (most recent call last):
>   File "/usr/local/bin/cqlsh", line 2044, in <module>
>     main(*read_options(sys.argv[1:], os.environ))
>   File "/usr/local/bin/cqlsh", line 2030, in main
>     display_float_precision=options.float_precision)
>   File "/usr/local/bin/cqlsh", line 480, in __init__
>     cql_version=cqlver, transport=transport)
>   File "/usr/local/lib/python2.7/site-packages/cql/connection.py", line 143, 
> in connect
>     consistency_level=consistency_level, transport=transport)
>   File "/usr/local/lib/python2.7/site-packages/cql/connection.py", line 59, 
> in __init__
>     self.establish_connection()
>   File "/usr/local/lib/python2.7/site-packages/cql/thrifteries.py", line 157, 
> in establish_connection
>     self.client.login(AuthenticationRequest(credentials=self.credentials))
>   File "/usr/local/lib/python2.7/site-packages/cql/cassandra/Cassandra.py", 
> line 454, in login
>     self.send_login(auth_request)
>   File "/usr/local/lib/python2.7/site-packages/cql/cassandra/Cassandra.py", 
> line 461, in send_login
>     args.write(self._oprot)
>   File "/usr/local/lib/python2.7/site-packages/cql/cassandra/Cassandra.py", 
> line 2769, in write
>     oprot.trans.write(fastbinary.encode_binary(self, (self.__class__, 
> self.thrift_spec)))
> TypeError: expected string or Unicode object, NoneType found
> {quote}
> At first I suspected that some system dependency had changed, so I have clean 
> reinstalled python, pip and cql. The error persists.
> I have also tested the cqlsh command on another Mac running OS 10.9.2 and it 
> can connect fine.



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