Tagar commented on issue #6673: NPE at io.druid.cli.CliInternalHadoopIndexer URL: https://github.com/apache/incubator-druid/issues/6673#issuecomment-442342142 NPE probably happens because `metadataSpec` is null returned by https://github.com/apache/incubator-druid/blob/0.12.3/services/src/main/java/io/druid/cli/CliInternalHadoopIndexer.java#L91 (my json file doesn't have `metadataUpdateSpec` ) - I thought it is optional. Hopefully this would be captured and reported better, and hopefully documented too.
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