我一直在環顧四周,搜索互聯網,但我找不到答案。也許我對我的聚合錯了,如果我錯了,請糾正我。mongodb組和計數,在分片環境中的錯誤
假想我有這樣
mongos數據> db.data_analytics.find()排序({_識別符:1})。。限制(1).pretty()
{ "title" : "data weather currency", "time" : "Sun Dec 08 2013 04:01:51 GMT+0900 (JST)", "_id" : ObjectId("52a3709f52d744c201000ba6"), "dataAnalytics" : [ { "keyItem" : "currency-yen-php", "currency" : 0.427044, "from" : "JPY", "to" : "PHP", "time" : "Sun Dec 08 2013 04:01:49 GMT+0900 (JST)", "key" : "currency" }, { "keyItem" : "weather-akiruno", "main-temp" : "5.78", "main-temp_min" : "2.78", "main-temp_max" : "7.78", "weather-main" : "Clouds", "weather-description" : "scattered clouds", "time" : "Sun Dec 08 2013 04:01:50 GMT+0900 (JST)", "key" : "weather" }, ], "__v" : 0 }
我想組和「$ dataAnalytics.currency」算,但我得到一個錯誤在分片環境這樣
mongos> db.data_analytics.aggregate([{$unwind: "$dataAnalytics"}, {$group:{_id:"$dataAnalytics.currency", c: {$sum:1}}}]) { "code" : 16390, "ok" : 0, "errmsg" : "exception: sharded pipeline failed on shard jeanepaul_set_pi_debian_01: { errmsg: \"exception: invalid operator \"$const\"\", code: 15999, ok: 0.0 }" }
我曾試圖複製成功設置這樣做,但在分片環境沒有運氣。可能是什麼問題呢?
我很感激任何幫助,並感謝您提前提供任何幫助!
感謝您的評論,我已經發現了什麼是錯的。它在運行在樹莓派上的碎片中。刪除後,一切工作正常:D – Hokutosei