Known Issues in Cloudera Distribution of Kafka 1.2.0
— High CPU utilization
Brokers with high partition count (approximately 2000) experience high CPU usage.
Bug: KAFKA-1952
Severity: Medium
Workaround: None
— NPE in Flume Kafka Source
A Kafka source in Flume throws a NullPointerException if it processes a message with no key.
Bug: FLUME-2578
Severity: Medium
Workaround: Ensure that all messages have a key.