Dear colleagues,
During my pilot testing I've got an error message during a text pattern
search operation coded as a Riak Client "map" logic. This error appeared
at a volume of approximately 20.000 keys, each with an 1 KB free text data
block associated. The Map function was coded in JavaScript. Here the
source:
query.map("""function(v) { var str = '"""+search_string+"""'; var data =
JSON.parse(v.values[0].data); if (v.values[0].data.toString().search(str)
!= -1) { return [[v.key, data]]; } return []; }""")
query.reduce("function(v) { var counteri = 0; for(var i in v) {counteri
+= 1;} return [['counter_found', counteri]]; } ")
The error shown is the following : [preflist_exhausted]
zbra:/opt/python/myprojects/riak # python pilot3.py
starts at : 2012-05-21 07:35:49.070470
How many keys in the bucket: 19760
Riak client exception: Error running MapReduce operation. Status: 500 :
{"phase":0,"error":"[preflist_exhausted]","input":"{ok,{r_object,<<\"ramtest\">>,<<\"XDHt25887344\">>,[{r_content,{dict,6,16,16,8,80,48,{[],[],[],[],[],[],[],[],[],[],[],[],[],[],[],[]},{{[],[],[[<<\"Links\">>]],[],[],[],[],[],[],[],[[<<\"content-type\">>,97,112,112,108,105,99,97,116,105,111,110,47,106,115,111,110],[<<\"X-Riak-VTag\">>,53,86,72,48,120,77,53,99,114,86,111,77,77,54,109,114,79,70,54,52,49,109]],[[<<\"index\">>]],[],[[<<\"X-Riak-Last-Modified\">>|{1337,595548,374416}]],[],[[<<\"X-Riak-Meta\">>]]}}},<<\"{\"is_valid\":
true, \"cEDO\":
\"GQZumfdWBCfX...\">>}],...},...}","type":"forward_preflist","stack":"[]"}
Any suggestions how to improve the pattern scan capability in the in the
RiakClient map function, or how enhance the JavaScript code for better
capacity?
Are there any servers setup tuning options to adjust?
Thanks in advance for your support.
Regards,
Claude
Claude Falbriard
Certified IT Specialist L2 - Middleware
AMS Hortolândia / SP - Brazil
phone: +55 19 9837 0789
cell: +55 13 8117 3316
e-mail: clau...@br.ibm.com
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