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| <h1 class="entry-title">Apache Kudu Weekly Update July 26, 2016</h1> |
| <p class="meta">Posted 26 Jul 2016 by Jean-Daniel Cryans</p> |
| </header> |
| <div class="entry-content"> |
| <p>Welcome to the eighteenth edition of the Kudu Weekly Update. This weekly blog post |
| covers ongoing development and news in the Apache Kudu project.</p> |
| |
| <!--more--> |
| |
| <h2 id="project-news">Project news</h2> |
| |
| <ul> |
| <li>Kudu has graduated from the Apache Incubator and is now a Top-Level Project! All the details |
| are in this <a href="http://kudu.apache.org/2016/07/25/asf-graduation.html">blog post</a>. |
| Mike Percy and Todd Lipcon made a few updates to the website to reflect the project’s |
| new name and status.</li> |
| </ul> |
| |
| <h2 id="development-discussions-and-code-in-progress">Development discussions and code in progress</h2> |
| |
| <ul> |
| <li> |
| <p>Dan Burkert contributed a few patches that repackage the Java client under <code class="language-plaintext highlighter-rouge">org.apache.kudu</code> |
| in place of <code class="language-plaintext highlighter-rouge">org.kududb</code>. This was done in a <strong>backward-incompatible</strong> way, meaning that import |
| statements will have to be modified in existing Java code to compile against a newer Kudu JAR |
| version (from 0.10.0 onward). This stems from <a href="http://mail-archives.apache.org/mod_mbox/kudu-dev/201605.mbox/%3CCAGpTDNcJohQBgjzXafXJQdqmBB4sL495p5V_BJRXk_nAGWbzhA@mail.gmail.com%3E">a discussion</a> |
| initiated in May. It won’t have an impact on C++ or Python users, and it isn’t affecting wire |
| compatibility.</p> |
| </li> |
| <li> |
| <p>Still on the Java-side, J-D Cryans pushed <a href="https://gerrit.cloudera.org/#/c/3055/">a patch</a> |
| that completely changes how Exceptions are managed. Before this change, users had to introspect |
| generic Exception objects, making it a guessing game and discouraging good error handling. |
| Now, the synchronous client’s methods throw <code class="language-plaintext highlighter-rouge">KuduException</code> which packages a <code class="language-plaintext highlighter-rouge">Status</code> object |
| that can be interrogated. This is very similar to how the C++ API works.</p> |
| |
| <p>Existing code that uses the new Kudu JAR should still compile since this change replaces generic |
| <code class="language-plaintext highlighter-rouge">Exception</code> with a more specific <code class="language-plaintext highlighter-rouge">KuduException</code>. Error handling done by string-matching the |
| exception messages should now use the provided <code class="language-plaintext highlighter-rouge">Status</code> object.</p> |
| </li> |
| <li> |
| <p>Alexey Serbin’s <a href="https://gerrit.cloudera.org/#/c/3619/">patch</a> that adds Doxygen-based |
| documentation was pushed and the new API documentation for C++ developers will be available |
| with the next release.</p> |
| </li> |
| <li> |
| <p>Todd has made many improvements to the <code class="language-plaintext highlighter-rouge">ksck</code> tool over the last week. Building upon Will |
| Berkeley’s <a href="https://gerrit.cloudera.org/#/c/3632/">WIP patch for KUDU-1516</a>, <code class="language-plaintext highlighter-rouge">ksck</code> can |
| now detect more problematic situations like if a tablet doesn’t have a majority of replicas on |
| live tablet servers, or if those replicas aren’t in a good state. |
| <code class="language-plaintext highlighter-rouge">ksck</code> is also <a href="https://gerrit.cloudera.org/#/c/3705/">now faster</a> when run against a large |
| cluster with a lot of tablets, among other improvements.</p> |
| </li> |
| <li> |
| <p>As mentioned last week, Dan has been working on <a href="https://gerrit.cloudera.org/#/c/3648/">adding add/remove range partition support</a> |
| in the C++ client and in the master. The patch has been through many rounds of review and |
| testing and it’s getting close to completion. Meanwhile, J-D started looking at adding support |
| for this functionality in the <a href="https://gerrit.cloudera.org/#/c/3731/">Java client</a>.</p> |
| </li> |
| <li> |
| <p>Adar Dembo is also hard at work on the master. The <a href="https://gerrit.cloudera.org/#/c/3609/">series</a> |
| <a href="https://gerrit.cloudera.org/#/c/3610/">of</a> <a href="https://gerrit.cloudera.org/#/c/3611/">patches</a> to |
| have the tablet servers heartbeat to all the masters that he published earlier this month is |
| getting near the finish line.</p> |
| </li> |
| </ul> |
| |
| <p>Want to learn more about a specific topic from this blog post? Shoot an email to the |
| <a href="mailto:user@kudu.incubator.apache.org">kudu-user mailing list</a> or |
| tweet at <a href="https://twitter.com/ApacheKudu">@ApacheKudu</a>. Similarly, if you’re |
| aware of some Kudu news we missed, let us know so we can cover it in |
| a future post.</p> |
| |
| </div> |
| </article> |
| |
| |
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| <div class="col-lg-3 recent-posts"> |
| <h3>Recent posts</h3> |
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| <li> <a href="/2024/03/07/introducing-auto-incrementing-column.html">Introducing Auto-incrementing Column in Kudu</a> </li> |
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| <li> <a href="/2023/09/07/apache-kudu-1-17-0-released.html">Apache Kudu 1.17.0 Released</a> </li> |
| |
| <li> <a href="/2022/06/17/apache-kudu-1-16-0-released.html">Apache Kudu 1.16.0 Released</a> </li> |
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| <li> <a href="/2021/06/22/apache-kudu-1-15-0-released.html">Apache Kudu 1.15.0 Released</a> </li> |
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| <li> <a href="/2021/01/28/apache-kudu-1-14-0-release.html">Apache Kudu 1.14.0 Released</a> </li> |
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| <li> <a href="/2021/01/15/bloom-filter-predicate.html">Optimized joins & filtering with Bloom filter predicate in Kudu</a> </li> |
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| <li> <a href="/2020/09/21/apache-kudu-1-13-0-release.html">Apache Kudu 1.13.0 released</a> </li> |
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| <li> <a href="/2019/11/20/apache-kudu-1-11-1-release.html">Apache Kudu 1.11.1 released</a> </li> |
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| <li> <a href="/2019/11/20/apache-kudu-1-10-1-release.html">Apache Kudu 1.10.1 released</a> </li> |
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