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| <p><strong>Yan Xu</strong></p> |
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| <p><em>Posted February 11, 2014</em></p> |
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| <h1>Mesos 0.16.0 Released</h1> |
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| <p>We recently released Mesos v0.16.0 on our <a href="http://mesos.apache.org/downloads/">downloads</a> page. It includes major <a href="https://issues.apache.org/jira/browse/MESOS-496">refactoring work</a> of the leading master election and detection process. This improves the reliability and flexibility of running multiple masters in your cluster, which provides Mesos with high availability.</p> |
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| <p>In high availability mode, if a leading master machine fails, Mesos holds elections to determine a new leader. Slave machines and schedulers detect the new leading master and connect to it, without disrupting services running on Mesos. Leader election implementation details, including how it works with <a href="http://zookeeper.apache.org">Zookeeper</a>, are detailed in the <a href="http://mesos.apache.org/documentation/latest/high-availability/">high availablity documentation</a>.</p> |
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| <h2>What’s Changed</h2> |
| |
| <p>Aside from the refactoring, v0.16.0 includes fixes for bugs which caused incorrect termination of Mesos masters and slaves:</p> |
| |
| <ul> |
| <li>Fixed ZooKeeper related bugs which terminated Mesos processes instead of automatically retrying them: <a href="https://issues.apache.org/jira/browse/MESOS-463">MESOS-463</a>, <a href="https://issues.apache.org/jira/browse/MESOS-465">MESOS-465</a>, <a href="https://issues.apache.org/jira/browse/MESOS-814">MESOS-814</a>.</li> |
| <li>Non-leading Master now stays up after ZooKeeper session expiration or after it is partitioned from ZooKeeper.</li> |
| <li>Slave no longer attempts to recover checkpointed data after a reboot: <a href="https://issues.apache.org/jira/browse/MESOS-844">MESOS-844</a>.</li> |
| </ul> |
| |
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| <p>Click to read the full <a href="https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12311242&version=12325295">release notes</a>.</p> |
| |
| <h2>Upgrading</h2> |
| |
| <p>To upgrade a live cluster, please refer to the <a href="http://mesos.apache.org/documentation/latest/upgrades/">Upgrades document</a>.</p> |
| |
| <h2>Getting Involved</h2> |
| |
| <p>We encourage you to try out this release, and let us know what you think on the <a href="mailto:user@mesos.apache.org">user mailing list</a>. You can also get in touch with us via <a href="https://twitter.com/intent/user?screen_name=ApacheMesos">@ApacheMesos</a> or via <a href="https://mesos.apache.org/community">mailing lists and IRC</a>.</p> |
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