The Apache ZooKeeper team has announced that Apache ZooKeeper release 3.5.3-beta is now available! This release is the first beta release of the 3.5 series, which cover 77 issues, thirteen of which were considered blockers. Here are some highlights:
- ZOOKEEPER-2719 Enable creation of TTL nodes, which are znode that’s not tied to a session and will get cleaned up automatically once expired.
- ZOOKEEPER-2014 Only admin roles should be allowed to reconfigure a cluster
- ZOOKEEPER-2693 Prevent DOS attack on wchp/wchc four letter words (4lw)
Critical Bug Fixes
- ZOOKEEPER-2383 Solve startup race in ZooKeeperServer
- ZOOKEEPER-2172 Cluster crashes when reconfig a new node as a participant
- ZOOKEEPER-2737 NettyServerCnxFactory leaks connection if exception happens while writing to a channel
- ZOOKEEPER-2247 Zookeeper service becomes unavailable when leader fails to write transaction log
- ZOOKEEPER-2080 Fix deadlock in dynamic reconfiguration
- ZOOKEEPER-2687 Deadlock while shutting down the Leader server
The Apache Hadoop project announced the release of 3.0.0-alpha2 on January 25th, 2017. This is the second alpha release in the 3.0.0 release series leading up to 3.0.0 GA, and incorporates 857 new fixes, improvements, and features since 3.0.0-alpha1 last September. It’s worth reading our previous blog post about 3.0.0-alpha1; in this post, we’ll discuss the new improvements that landed in alpha2.
Classpath Isolation for Hadoop Client Jars
The pain of classpath isolation has been experienced by many Java developers.
After the GA of Apache Kudu in Cloudera CDH 5.10, we take a look at the Apache Spark on Kudu integration, share code snippets, and explain how to get up and running quickly, as Kudu is already a first-class citizen in Spark’s ecosystem.
As the Apache Kudu development team celebrates the initial 1.0 release launched on September 19, and the most recent 1.2.0 version now GA as part of Cloudera’s CDH 5.10 release,
[Update: A new package for Apache Phoenix 4.7.0 on CDH 5.7 was released in June 2016.]
New Cloudera Labs packages for Apache Phoenix 4.5.2 (which includes Apache Spark integration) is now available for CDH 5.4.x and CDH 5.5.x.
Earlier this year, Cloudera announced the inclusion of Apache Phoenix in Cloudera Labs.
To recap: Phoenix adds SQL to Apache HBase,
The new support for complex types in Impala makes running analytic workloads considerably simpler.
Impala 2.3 (shipping starting in Cloudera Enterprise 5.5) contains support for querying complex types in Apache Parquet tables, specifically ARRAY, MAP, and STRUCTs. This capability enables users to query against naturally nested data sets without having to perform ETL to flatten them. This feature provides a few major benefits, including:
- It removes additional ETL and data modeling work to flatten data sets.