gipeshka opened a new issue #8280: The metrics specification on ingestSegment firehose is not clear URL: https://github.com/apache/incubator-druid/issues/8280 ### Affected Version 0.15 ### Description This issue actually addresses closed https://github.com/apache/incubator-druid/issues/2956 The issue that I encountered was exactly the same as in the referenced issue: when ingestSegment firehose is used to rollup data all metrics were 0. However after short investigation I found out that I have to put dimensions into `metrics` part of `ioConfig.firehose` like this: ```json "ioConfig":{ "type":"index", "firehose":{ "type":"ingestSegment", "dataSource":"rawSource", "interval":"2019-08-07T10:00:00.000/2019-08-07T11:00:00.000", "metrics":[ "dimension1", "dimension2" ] } } ``` then these `dimension1` and `dimension2` can be used to build new metrics. I think this thing should be addressed in the documentation at https://druid.apache.org/docs/latest/ingestion/firehose.html `IngestSegmentFirehose`.
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