pomdtr opened a new issue #9388: Unable to set maxNumConcurrentSubTasks 
property for index_parallel ingestion task
URL: https://github.com/apache/druid/issues/9388
 
 
   ### Affected Version
   
   Druid 0.17
   
   ### Description
   
   The maxNumConcurrentSubTasks property is not parsed
   
   #### My Task
   
   ```json
   {
       "type": "index_parallel",
       "spec": {
           "dataSchema": {
               "dataSource": "mydatasource",
               "timestampSpec": {
                   "column": "jour"
               },
               "dimensionsSpec": {
                   "dimensions": [dim1...]
               }
               "metricsSpec": [metric1...],
               "granularitySpec": {
                   "type": "uniform",
                   "segmentGranularity": "DAY",
                   "queryGranularity": "none",
                   "intervals": [
                       "2018-12-31/2020-02-10"
                   ],
                   "rollup": false
               }
           },
           "ioConfig": {
               "type": "index_parallel",
               "inputSource": {
                   "type": "google",
                   "prefixes": [
                       "gs://my-path/"
                   ]
               },
               "inputFormat": {
                   "type": "json"
               }
           }
       },
       "tuningConfig": {
           "type": "index_parallel",
           "maxNumConcurrentSubTasks": 4
       }
   }
   ```
   
   #### Genetated query:
   
   ```json
   {
     "type" : "index_parallel",
     "id" : "*****-jsonplain_chpijoec_2020-02-21T10:38:00.017Z",
     "groupId" : "*****-jsonplain_chpijoec_2020-02-21T10:38:00.017Z",
     "resource" : {
       "availabilityGroup" : 
"*****-jsonplain_chpijoec_2020-02-21T10:38:00.017Z",
       "requiredCapacity" : 1
     },
     "spec" : {
       "dataSchema" : {
         "dataSource" : "mydatasource",
         "timestampSpec" : {
           "column" : "jour",
           "format" : "auto",
           "missingValue" : null
         },
         "dimensionsSpec" : {
           "dimensions" : [],
           "dimensionExclusions" : [ "jour" ]
         },
         "metricsSpec" : [ ],
         "granularitySpec" : {
           "type" : "uniform",
           "segmentGranularity" : "DAY",
           "queryGranularity" : {
             "type" : "none"
           },
           "rollup" : false,
           "intervals" : [ "2018-12-31T00:00:00.000Z/2020-02-10T00:00:00.000Z" ]
         },
         "transformSpec" : {
           "filter" : null,
           "transforms" : [ ]
         }
       },
       "ioConfig" : {
         "type" : "index_parallel",
         "inputSource" : {
           "type" : "google",
           "uris" : null,
           "prefixes" : [ "gs://mypath" ],
           "objects" : null
         },
         "inputFormat" : {
           "type" : "json",
           "flattenSpec" : {
             "useFieldDiscovery" : true,
             "fields" : [ ]
           },
           "featureSpec" : { }
         },
         "appendToExisting" : false
       },
       "tuningConfig" : {
         "type" : "index_parallel",
         "maxRowsPerSegment" : null,
         "maxRowsInMemory" : 1000000,
         "maxBytesInMemory" : 0,
         "maxTotalRows" : null,
         "numShards" : null,
         "splitHintSpec" : null,
         "partitionsSpec" : null,
         "indexSpec" : {
           "bitmap" : {
             "type" : "concise"
           },
           "dimensionCompression" : "lz4",
           "metricCompression" : "lz4",
           "longEncoding" : "longs"
         },
         "indexSpecForIntermediatePersists" : {
           "bitmap" : {
             "type" : "concise"
           },
           "dimensionCompression" : "lz4",
           "metricCompression" : "lz4",
           "longEncoding" : "longs"
         },
         "maxPendingPersists" : 0,
         "forceGuaranteedRollup" : false,
         "reportParseExceptions" : false,
         "pushTimeout" : 0,
         "segmentWriteOutMediumFactory" : null,
         "maxNumConcurrentSubTasks" : 1,
         "maxRetry" : 3,
         "taskStatusCheckPeriodMs" : 1000,
         "chatHandlerTimeout" : "PT10S",
         "chatHandlerNumRetries" : 5,
         "maxNumSegmentsToMerge" : 100,
         "totalNumMergeTasks" : 10,
         "logParseExceptions" : false,
         "maxParseExceptions" : 2147483647,
         "maxSavedParseExceptions" : 0,
         "buildV9Directly" : true,
         "partitionDimensions" : [ ]
       }
     },
     "context" : {
       "forceTimeChunkLock" : true
     },
     "dataSource" : "mydatasource"
   }
   ```

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