ektravel commented on code in PR #16522: URL: https://github.com/apache/druid/pull/16522#discussion_r1622569127
########## docs/release-info/upgrade-notes.md: ########## @@ -26,6 +26,83 @@ The upgrade notes assume that you are upgrading from the Druid version that imme For the full release notes for a specific version, see the [releases page](https://github.com/apache/druid/releases). +## 30.0.0 + +### Upgrade notes + +#### Append JsonPath function + +The `append` function for JsonPath for ORC format now fails with an exception. Previously, it would run but not append anything. + +[#15772](https://github.com/apache/druid/pull/15772) + +#### Kinesis ingestion tuning + +The following properties have been deprecated as part of simplifying the memory tuning for Kinesis ingestion: + +- `recordBufferSize`, use `recordBufferSizeBytes` instead +- `maxRecordsPerPoll`, use `maxBytesPerPoll` instead + +[#15360](https://github.com/apache/druid/pull/15360) + +#### Improved Supervisor rolling restarts + +The `stopTaskCount` config now prioritizes stopping older tasks first. As part of this change, you must also explicitly set a value for `stopTaskCount`. It no longer defaults to the same value as `taskCount`. + +[#15859](https://github.com/apache/druid/pull/15859) + +#### Changes to Coordinator default values + +The following are the changes to the default values for the Coordinator service: + +* The default value for `druid.coordinator.kill.period` (if unspecified) has changed from `P1D` to the value of `druid.coordinator.period.indexingPeriod`. Operators can choose to override `druid.coordinator.kill.period` and that takes precedence over the default behavior. +* The default value for the dynamic configuration property `killTaskSlotRatio` has been updated from `1.0` to `0.1`. This ensures that kill tasks take up only one task slot by default instead of consuming all available task slots. + +[#16247](https://github.com/apache/druid/pull/16247) + +#### `GoogleTaskLogs` upload buffer size + +Changed the upload buffer size in `GoogleTaskLogs` to 1 MB instead of 15 MB to allow more uploads in parallel and prevent the MiddleManager service from running out of memory. + +[#16236](https://github.com/apache/druid/pull/16236) + +### Incompatible changes + +#### Changes to `targetDataSource` in EXPLAIN queries + +Druid 30.0.0 includes a breaking change that restores the behavior for `targetDataSource` to its 28.0.0 and earlier state, different from Druid 29.0.0 and only 29.0.0. In 29.0.0, `targetDataSource` returns a JSON object that includes the datasource name. In all other versions, `targetDataSource` returns a string containing the name of the datasource. + +If you're upgrading from any version other than 29.0.0, there is no change in behavior. + +If you are upgrading from 29.0.0, this is an incompatible change. + +[#16004](https://github.com/apache/druid/pull/16004) + +#### Removed ZooKeeper-based segment loading Review Comment: @cryptoe The change you requested is on PR https://github.com/apache/druid/pull/16526. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For additional commands, e-mail: commits-h...@druid.apache.org
