Kafka Appender causes Log4j Deadlock; patched by David Arthur; reviewed by Jun Rao; kafka-524
KAFKA-870 hadoop-producer KafkaRecordWriter writes entire input buffer capacity, even when intended payload is smaller; reviewed by Neha Narkhede
kafka-882; Enhance 0.7 ProducerPerformance to send sequential MessageID as in 0.8; patched by John Fung; reviewed by Jun Rao