Howdy folks,
still trying to wrap my head arround riak and map/reduce, so I decided
to follow the fast-track and play arround with some of the examples.
Its easy enough and the examples work just like advertised. However, I
seem to be missing a critical part of knowledge about the map reduce
phases since I cannot explain this error.
I loaded the goog.csv into riak and try to run this job:
{
"inputs": [
["goog", "2008-10-10"]
],
"query": [
{"map":{"language":"javascript", "name":"Riak.mapValuesJson"}},
{"map":{"language":"javascript", "name":"Riak.mapValuesJson"}}
]
}
I know its pointless, but afaict I should end up with
"[{"Date":"2008-10-10","Open":313.16,"High":341.89,"Low":310.3,"Close":332,"Volume":10597800,"Adj.
Close":332}]", which is what I get when I run with only ONE map phase.
However I get a 500 with:
The server encountered an error while processing this request:
{error,{error,{case_clause,{bad_return_value,{error,bad_input}}},
[{riak_kv_wm_mapred,process_post,2},
{webmachine_resource,resource_call,3},
{webmachine_resource,do,3},
{webmachine_decision_core,resource_call,1},
{webmachine_decision_core,decision,1},
{webmachine_decision_core,handle_request,2},
{webmachine_mochiweb,loop,1},
{mochiweb_http,headers,5}]}}
I thought I can chain multiple map phases together?
Cheers,
/thomas
PS: this is on the riak-0.11.0-osx-x86_64.tar.gz release binary btw
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