Apache ZooKeeper is practically a simple service that provides a centralized inventory about applications distributed across multiple servers.
ZeeKeeper can track and monitor services, managing joint or separate configurations for each of them, keeping them and their data in sync from a central, easier to manage location.
The project was developed at first for Apache Hadoop services, but its recent versions can be used for a whole lot more than data processing.
Apache ZooKeeper is recommended for any distributed software or application that needs to manage environment changes but also needs to adhere to a governing set of rules.
Using Zookeeper also allows applications to be lighter, out-sourcing their management controls to a centralized location and only needing to handle one or few finite jobs instead.
What is new in this release:
- NPE in FileTxnSnapLog when restarting a cluster.
- C client doesn't compile on FreeBSD.
What is new in version 3.2.2:
- ASyncHammerTest is failing intermittently on hudson trunk.
- Sanity check in QuorumCnxn Manager and quorum communication port.
- ZooKeeper can revert to old data when a snapshot is created outside of normal processing.
- LearnerHandler is misspelt in the thread's constructor.
- zkpython limited to 256 handles.
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