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<h1 class="entry-title">Apache Kudu 1.6.0 released</h1>
<p class="meta">Posted 08 Dec 2017 by Mike Percy</p>
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<p>The Apache Kudu team is happy to announce the release of Kudu 1.6.0!</p>
<p>Apache Kudu 1.6.0 is a minor release that offers new features, performance
optimizations, incremental improvements, and bug fixes.</p>
<p>Release highlights:</p>
<li>Kudu servers can now tolerate short interruptions in NTP clock
synchronization. NTP synchronization is still required when any Kudu daemon
starts up.</li>
<li>Tablet servers will no longer crash when a disk containing data blocks
fails, unless that disk also stores WAL segments or tablet metadata. Instead
of crashing, the tablet server will shut down any tablets that may have lost
data locally and Kudu will re-replicate the affected tablets to another
tablet server. More information can be found in the documentation under
<a href="/releases/1.6.0/docs/administration.html#disk_failure_recovery">Recovering from Disk Failure</a>.</li>
<li>Tablet server startup time has been improved significantly on servers
containing large numbers of blocks.</li>
<li>The Spark DataSource integration now can take advantage of scan locality for
better scan performance. The scan will take place at the closest replica
instead of going to the leader.</li>
<li>Support for Spark 1 has been removed in Kudu 1.6.0 and now only Spark 2 is
supported. Spark 1 support was deprecated in Kudu 1.5.0.</li>
<li>HybridTime timestamp propagation now works in the Java client when using
scan tokens.</li>
<li>Tablet servers now consider the health of all replicas of a tablet before
deciding to evict one. This can improve the stability of the Kudu cluster
when multiple servers temporarily go down at the same time.</li>
<li>A bug in the C++ client was fixed that could cause tablets to be erroneously
pruned, or skipped, during certain scans, resulting in fewer results than
expected being returned from queries. The bug only affected tables whose
range partition columns are a proper prefix of the primary key.
See <a href="">KUDU-2173</a> for more
<p>For more details, and the complete list of changes in Kudu 1.6.0, please see
the <a href="/releases/1.6.0/docs/release_notes.html">Kudu 1.6.0 release notes</a>.</p>
<p>The Apache Kudu project only publishes source code releases. To build Kudu
1.6.0, follow these steps:</p>
<li>Download the <a href="/releases/1.6.0/">Kudu 1.6.0 source release</a>.</li>
<li>Follow the instructions in the documentation to
<a href="/releases/1.6.0/docs/installation.html#build_from_source">build Kudu 1.6.0 from source</a>.</li>
<p>For your convenience, binary JAR files for the Kudu Java client library, Spark
DataSource, Flume sink, and other Java integrations are published to the ASF
Maven repository and are
<a href="">now available</a>.</p>
<div class="col-lg-3 recent-posts">
<h3>Recent posts</h3>
<li> <a href="/2020/07/30/building-near-real-time-big-data-lake.html">Building Near Real-time Big Data Lake</a> </li>
<li> <a href="/2020/05/18/apache-kudu-1-12-0-release.html">Apache Kudu 1.12.0 released</a> </li>
<li> <a href="/2019/11/20/apache-kudu-1-11-1-release.html">Apache Kudu 1.11.1 released</a> </li>
<li> <a href="/2019/11/20/apache-kudu-1-10-1-release.html">Apache Kudu 1.10.1 released</a> </li>
<li> <a href="/2019/07/09/apache-kudu-1-10-0-release.html">Apache Kudu 1.10.0 Released</a> </li>
<li> <a href="/2019/04/30/location-awareness.html">Location Awareness in Kudu</a> </li>
<li> <a href="/2019/04/22/fine-grained-authorization-with-apache-kudu-and-impala.html">Fine-Grained Authorization with Apache Kudu and Impala</a> </li>
<li> <a href="/2019/03/19/testing-apache-kudu-applications-on-the-jvm.html">Testing Apache Kudu Applications on the JVM</a> </li>
<li> <a href="/2019/03/15/apache-kudu-1-9-0-release.html">Apache Kudu 1.9.0 Released</a> </li>
<li> <a href="/2019/03/05/transparent-hierarchical-storage-management-with-apache-kudu-and-impala.html">Transparent Hierarchical Storage Management with Apache Kudu and Impala</a> </li>
<li> <a href="/2018/12/11/call-for-posts.html">Call for Posts</a> </li>
<li> <a href="/2018/10/26/apache-kudu-1-8-0-released.html">Apache Kudu 1.8.0 Released</a> </li>
<li> <a href="/2018/09/26/index-skip-scan-optimization-in-kudu.html">Index Skip Scan Optimization in Kudu</a> </li>
<li> <a href="/2018/09/11/simplified-pipelines-with-kudu.html">Simplified Data Pipelines with Kudu</a> </li>
<li> <a href="/2018/08/06/getting-started-with-kudu-an-oreilly-title.html">Getting Started with Kudu - an O'Reilly Title</a> </li>
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