I am working on upgrading our internal cluster to 0.12.1 release and seeing that a few data sources fail to load. Looking at coordinator logs, I am seeing messages like this for the datasource:
@400000005b50dbc637061cec 2018-07-19T18:43:08,923 INFO [Coordinator-Exec--0] io.druid.server.coordinator.CuratorLoadQueuePeon - Asking server peon[/druid-test--001/loadQueue/127.0.0.1:7103] to drop segment[*datasource* _2015-09-03T00:00:00.000Z_2015-09-04T00:00:00.000Z_2018-04-23T21:24:04.910Z] @400000005b50dbc637391f84 2018-07-19T18:43:08,926 WARN [Coordinator-Exec--0] io.druid.server.coordinator.rules.LoadRule - No available [_default_tier] servers or node capacity to assign primary segment[*datasource*-08-10T00:00:00.000Z_2015-08-11T00:00:00.000Z_2018-04-23T21:24:04.910Z]! Expected Replicants[1] The datasource failed to load for a long time and then eventually was loaded successfully. Has anyone else seen this? I see a few fixes around segment loading and coordination in 0.12.2 (which I am hoping will be out soon) but I am not sure if they address this issue.
