Apache Flume Known Issues
Flume Kafka client incompatible changes in CDH 5.8
Due to the change of offset storage from ZooKeeper to Kafka in the CDH 5.8 Flume Kafka client, data might not be consumed by the Flume agents, or might be duplicated (if kafka.auto.offset.reset=smallest) during an upgrade to CDH 5.8.
Workaround: See Upgrading to CDH 5.8 When Using the Flume Kafka Client
Hive sink support
Flume does not provide a native sink that stores the data that can be directly consumed by Hive.
Fast Replay does not work with encrypted File Channel
If an encrypted file channel is set to use fast replay, the replay will fail and the channel will fail to start.
Workaround: Disable fast replay for the encrypted channel by setting use-fast-replay to false.