In this installment of “Meet the Engineer”, get to know Customer Operations Engineering Manager/Apache Sqoop committer Kathleen Ting (@kate_ting).
What do you do at Cloudera, and in what open-source projects are you involved?
I’m a support manager at Cloudera, and an Apache Sqoop committer and PMC member. I also contribute to the Apache Flume and Apache ZooKeeper mailing lists and organize and present at meetups, as well as speak at conferences,
For several good reasons, 2013 is a Happy New Year for Apache Hadoop enthusiasts.
In 2012, we saw continued progress on developing the next generation of the MapReduce processing framework (MRv2), work that will bear fruit this year. HDFS experienced major progress toward becoming a lights-out, fully enterprise-ready distributed filesystem with the addition of high availability features and increased performance. And a hint of the future of the Hadoop platform was provided with the Beta release of Cloudera Impala,
AssignmentManager is a module in the Apache HBase Master that manages regions to RegionServers assignment. (See HBase architecture for more information.) It ensures that all regions are assigned and each region is assigned to just one RegionServer.
Although the AssignmentManager generally does a good job, the existing implementation does not handle assignments as well as it could. For example, if a region was assigned to two or more RegionServers,
Apache ZooKeeper release 3.4.5 is now available. This is a bug fix release covering 3 issues, one of which was considered critical. These issues were:
- ZOOKEEPER-1550 ZooKeeperSaslClient does not finish anonymous login on OpenJDK
- ZOOKEEPER-1560 Zookeeper client hangs on creation of large nodes
- ZOOKEEPER-1376 zkServer.sh does not correctly check for $SERVER_JVMFLAGS
Stability, Compatibility and Testing
3.4.5 is a stable release that’s fully backward compatible with 3.4.4.
Update time! As a reminder, Cloudera releases major versions of CDH, our 100% open source distribution of Apache Hadoop and related projects, annually and then updates to CDH every three months. Updates primarily comprise bug fixes but we will also add enhancements. We only include fixes or enhancements in updates that maintain compatibility, improve system stability and still allow customers and users to skip updates as they see fit.
We’re pleased to announce the availability of CDH4.1.