[GitHub] [incubator-druid] love1693294577 commented on issue #7411: [materialized view] Too many Hadoop jobs doing the same thing

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love1693294577 commented on issue #7411: [materialized view] Too many Hadoop jobs doing the same thing
URL: https://github.com/apache/incubator-druid/issues/7411#issuecomment-482428382
 
 
   hello，materialized-view get all derivatives for datasource in query is null ，
   
   Have you ever met?
   
   [groupBy_[xxx_view2]_ad3ca90c-30b0-4be2-9169-739114c583b7]]
   org.apache.druid.query.materializedview.DataSourceOptimizer - +++++++derivatives+++++++[]
   
   this is my Configuration
   'http://xx.xx.xx.xx:8082/druid/v2/?pretty=' 
   {
   "type":"derivativeDataSource",
   "baseDataSource":"xx_view2",
   "dataSource":"xx_view_11",
   "dimensionsSpec":{
   "dimensions":[
   "xx",
   "xx"
   ]
   },
   "metricsSpec" : [
   { "name": "xx",
   "type": "doubleSum",
   "fieldName":"xx"}
   ],
   "tuningConfig": {
   "type":"hadoop",
   "jobProperties" : {
   "mapreduce.job.user.classpath.first":"true",
   "mapreduce.reduce.speculative" : "false",
   "mapreduce.map.speculative": "false"
   }
   }
   }
   submit task
   curl -XPOST -H'Content-Type: application/json' -d @xx.json http://xx.xx.xx.xx:8090/druid/indexer/v1/supervisor
   
   query
   '{"queryType":"view","query":{"queryType":"groupBy","dataSource":"xxx_view2","granularity":"all","descending":"true","limitSpec":{"type":"default","limit":1},"context":{"priority":1,"timeout":10000000,"queryId":"c7156e24-ad74-4a4b-ae24-2df660cd8287","groupByStrategy":"v2"},"dimensions":["xx"],"aggregations":[{"type":"longSum","name":"xx","fieldName":"xx"}],"intervals":["2017-04-26T00:00:00.000+08:00/2017-04-28T00:00:00.000+08:00"]}
   
   I can't get an optimized materialized view
   
   This is my log
   2019-04-11T11:54:21,057 INFO [qtp1556201248-110[topN_[xx_view2]_c7156e24-ad74-4a4b-ae24-2df660cd8287]] org.apache.druid.query.materializedview.DataSourceOptimizer - +++++++derivatives+++++++[]
   
   I am wondering why the derivatives are null, as normal, will get derivatives

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