We recently upgraded from Druid 0.8.2. to 0.9.2 and would like to use roaring bitmaps by default. Unfortunately the config option druid.processing.bitmap.type=roaring doesn’t work anymore, it was removed by https://github.com/druid-io/druid/pull/1804.
We can now use roaring bitmaps by configuring indexSpec in our Hadoop Index Tasks but the Merge Tasks created by the coordinator to merge small segments to larger ones use the default consise bitmaps. I don’t see an option to set another default value.
Thanks for help,