Apache Chukwa Java JavaScript Chukwa is an open source data collection system for monitoring large distributed systems. Chukwa is an open source data collection system for monitoring large distributed systems. Chukwa is built on top of the Hadoop Distributed File System (HDFS) and Map/Reduce framework and inherits Hadoop’s scalability and robustness. Chukwa also includes a flexible and powerful toolkit for displaying, monitoring and analyzing results to make the best use of the collected data. Recommended current 0.5 release 2012-01-25 0.5.0 Hypertext Transfer Protocol -- HTTP/1.1 IETF RFC 2616 HTTP Authentication: Basic and Digest Access Authentication IETF RFC 2617