Hi,
I've been trying to piece together some notion of how to use cassandra from
an erlang client.
So far I have managed to come up with the following, but it doesn't work.
Unfortunately there does not seem to be any decent documentation on the
subject I can find with googling so I'm hoping some more experienced members
of this mailing list can point out what I'm doing wrong.
I'm using cassandra 0.5, and I think the latest version of thrift.
I generated the thrift erlang client code using:
$ thrift -r --gen erl cassandra.thrift
And compiled and copied that into my ebin area, along with the rest of the
thrift erlc library code.
I start cassandra using its default config bin/cassandra -f and there are no
apparent errors:
$ bin/cassandra -f
Listening for transport dt_socket at address: 8888
INFO - Sampling index for
/var/lib/cassandra/data/system/LocationInfo-9-Data.db
INFO - Replaying /var/lib/cassandra/commitlog/CommitLog-1267655779083.log
INFO - Log replay complete
INFO - Saved Token found: 141354730401634313333347303685581151939
INFO - Starting up server gossip
INFO - Cassandra starting up...
then after a few seconds, it displays this:
Debugger failed to attach: timeout during handshake
Then from an erl vm I try the following:
rr(cassandra_types).
{ok, C} = thrift_client:start_link("localhost",8888, cassandra_thrift).
thrift_client:call( C,
'insert',
[ "Keyspace1",
"1",
#columnPath{column_family="Standard1", column="email"},
"[email protected]",
1,
1
] ).
Unfortunately, although I get a cassandra_thrift client connection, the call
to insert fails with :
=ERROR REPORT==== 4-Mar-2010::07:57:50 ===
** Generic server <0.333.0> terminating
** Last message in was {call,insert,
["Keyspace1","1",
{columnPath,"Standard1",undefined,"email"},
"[email protected]",1,1]}
** When Server state == {state,cassandra_thrift,
{protocol,thrift_binary_protocol,
{binary_protocol,
{transport,thrift_buffered_transport,<0.334.0>},
true,true}},
0}
** Reason for termination ==
** {{case_clause,{error,closed}},
[{thrift_client,read_result,3},
{thrift_client,catch_function_exceptions,2},
{thrift_client,handle_call,3},
{gen_server,handle_msg,5},
{proc_lib,init_p_do_apply,3}]}
** exception exit: {case_clause,{error,closed}}
in function thrift_client:read_result/3
in call from thrift_client:catch_function_exceptions/2
in call from thrift_client:handle_call/3
in call from gen_server:handle_msg/5
in call from proc_lib:init_p_do_apply/3
Cassandra itself reports nothing.
-- JT.
