mihai-cazacu-adswizz opened a new issue #6945: The materialized view is not created for a data source produced by Kafka Indexing Service URL: https://github.com/apache/incubator-druid/issues/6945 Hi, I'm trying to create a materialized view for a data source created by an ingestion from Kafka (using [Kafka Indexing Service](http://druid.io/docs/latest/development/extensions-core/kafka-ingestion.html)). The used spec: ``` { "baseDataSource": "the-kafka-data-source", "dataSource": "the-kafka-data-source-view", "dimensionsSpec": { "dimensions": [ "dimA", "dimB" ] }, "metricsSpec": [ { "fieldName": "metricA", "name": "metricASum", "type": "longSum" } ], "hadoopDependencyCoordinates": [ "org.apache.hadoop:hadoop-client:2.7.3" ], "tuningConfig": { "jobProperties": { "fs.s3.impl": "org.apache.hadoop.fs.s3native.NativeS3FileSystem", "fs.s3n.impl": "org.apache.hadoop.fs.s3native.NativeS3FileSystem", "io.compression.codecs": "org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.BZip2Codec,org.apache.hadoop.io.compress.SnappyCodec", "mapreduce.job.classloader": "true" }, "type": "hadoop" }, "type": "derivativeDataSource" } ``` Once the spec is used, the Supervisor is successfully created but there is no task for creating the view. The Supervisor's payload: ``` { "type": "derivativeDataSource", "baseDataSource": "the-kafka-data-source", "dimensionsSpec": { "dimensions": [ { "type": "string", "name": "dimA", "multiValueHandling": "SORTED_ARRAY", "createBitmapIndex": true }, { "type": "string", "name": "dimB", "multiValueHandling": "SORTED_ARRAY", "createBitmapIndex": true } ], "dimensionExclusions": [] }, "metricsSpec": [ { "type": "longSum", "name": "metricASum", "fieldName": "metricA", "expression": null } ], "tuningConfig": { "type": "hadoop", "workingPath": null, "version": "2019-01-29T12:42:15.475Z", "partitionsSpec": { "type": "hashed", "targetPartitionSize": -1, "maxPartitionSize": -1, "assumeGrouped": false, "numShards": -1, "partitionDimensions": [] }, "shardSpecs": {}, "indexSpec": { "bitmap": { "type": "concise" }, "dimensionCompression": "lz4", "metricCompression": "lz4", "longEncoding": "longs" }, "maxRowsInMemory": 1000000, "maxBytesInMemory": 0, "leaveIntermediate": false, "cleanupOnFailure": true, "overwriteFiles": false, "ignoreInvalidRows": false, "jobProperties": { "fs.s3.impl": "org.apache.hadoop.fs.s3native.NativeS3FileSystem", "fs.s3n.impl": "org.apache.hadoop.fs.s3native.NativeS3FileSystem", "io.compression.codecs": "org.apache.hadoop.io.compress.GzipCodec,org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.BZip2Codec,org.apache.hadoop.io.compress.SnappyCodec", "mapreduce.job.classloader": "true" }, "combineText": false, "useCombiner": false, "buildV9Directly": true, "numBackgroundPersistThreads": 0, "forceExtendableShardSpecs": false, "useExplicitVersion": false, "allowedHadoopPrefix": [], "logParseExceptions": false, "maxParseExceptions": 0 }, "dataSource": "the-kafka-data-source-view", "hadoopCoordinates": null, "hadoopDependencyCoordinates": [ "org.apache.hadoop:hadoop-client:2.7.3" ], "classpathPrefix": null, "context": {}, "suspended": false } ``` and its status: ``` { "id": "the-kafka-data-source-view", "generationTime": "2019-01-29T13:21:17.721Z", "payload": "{dataSource='the-kafka-data-source-view', baseDataSource='the-kafka-data-source', suspended='false', dimensions=[dimA, dimB], metrics=[metricASum], missTimeline[]}" } ``` I've tried to use the same specification for another data source which was created by an ingestion task from S3 and it worked as expected. @zhangxinyu1: Is this a special case for Materalized View that requires a different approach?
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