blob: 40b7e8a4432987370c0df0535d0f2ff0f5bc1b70 [file] [log] [blame]
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="A new open source Apache Hadoop ecosystem project, Apache Kudu completes Hadoop's storage layer to enable fast analytics on fast data" />
<meta name="author" content="Cloudera" />
<title>Apache Kudu - Apache Kudu Weekly Update July 26, 2016</title>
<!-- Bootstrap core CSS -->
<link rel="stylesheet" href=""
<!-- Custom styles for this template -->
<link href="/css/kudu.css" rel="stylesheet"/>
<link href="/css/asciidoc.css" rel="stylesheet"/>
<link rel="shortcut icon" href="/img/logo-favicon.ico" />
<link rel="stylesheet" href="" />
<link rel="alternate" type="application/atom+xml"
title="RSS Feed for Apache Kudu blog"
href="/feed.xml" />
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src=""></script>
<script src=""></script>
<div class="kudu-site container-fluid">
<!-- Static navbar -->
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<a class="logo" href="/"><img
srcset="// 1x, // 2x"
alt="Apache Kudu"/></a>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li >
<a href="/">Home</a>
<li >
<a href="/overview.html">Overview</a>
<li >
<a href="/docs/">Documentation</a>
<li >
<a href="/releases/">Releases</a>
<li class="active">
<a href="/blog/">Blog</a>
<!-- NOTE: this dropdown menu does not appear on Mobile, so don't add anything here
that doesn't also appear elsewhere on the site. -->
<li class="dropdown">
<a href="/community.html" role="button" aria-haspopup="true" aria-expanded="false">Community <span class="caret"></span></a>
<ul class="dropdown-menu">
<li class="dropdown-header">GET IN TOUCH</li>
<li><a class="icon email" href="/community.html">Mailing Lists</a></li>
<li><a class="icon slack" href="">Slack Channel</a></li>
<li role="separator" class="divider"></li>
<li><a href="/community.html#meetups-user-groups-and-conference-presentations">Events and Meetups</a></li>
<li><a href="/committers.html">Project Committers</a></li>
<!--<li><a href="/roadmap.html">Roadmap</a></li>-->
<li><a href="/community.html#contributions">How to Contribute</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">DEVELOPER RESOURCES</li>
<li><a class="icon github" href="">GitHub</a></li>
<li><a class="icon gerrit" href="">Gerrit Code Review</a></li>
<li><a class="icon jira" href="">JIRA Issue Tracker</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">SOCIAL MEDIA</li>
<li><a class="icon twitter" href="">Twitter</a></li>
<li><a href="">Reddit</a></li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">APACHE SOFTWARE FOUNDATION</li>
<li><a href="" target="_blank">Security</a></li>
<li><a href="" target="_blank">Sponsorship</a></li>
<li><a href="" target="_blank">Thanks</a></li>
<li><a href="" target="_blank">License</a></li>
<li >
<a href="/faq.html">FAQ</a>
</ul><!-- /.nav -->
</div><!-- /#navbar -->
</div><!-- /.container-fluid -->
<div class="row header">
<div class="col-lg-12">
<h2><a href="/blog">Apache Kudu Blog</a></h2>
<div class="row-fluid">
<div class="col-lg-9">
<h1 class="entry-title">Apache Kudu Weekly Update July 26, 2016</h1>
<p class="meta">Posted 26 Jul 2016 by Jean-Daniel Cryans</p>
<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>
<h2 id="project-news">Project news</h2>
<li>Kudu has graduated from the Apache Incubator and is now a Top-Level Project! All the details
are in this <a href="">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>
<h2 id="development-discussions-and-code-in-progress">Development discussions and code in progress</h2>
<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="">a discussion</a>
initiated in May. It won’t have an impact on C++ or Python users, and it isn’t affecting wire
<p>Still on the Java-side, J-D Cryans pushed <a href="">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>
<p>Alexey Serbin’s <a href="">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>
<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="">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="">now faster</a> when run against a large
cluster with a lot of tablets, among other improvements.</p>
<p>As mentioned last week, Dan has been working on <a href="">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="">Java client</a>.</p>
<p>Adar Dembo is also hard at work on the master. The <a href="">series</a>
<a href="">of</a> <a href="">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>
<p>Want to learn more about a specific topic from this blog post? Shoot an email to the
<a href="">kudu-user mailing list</a> or
tweet at <a href="">@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 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>
<footer class="footer">
<div class="row">
<div class="col-md-9">
<p class="small">
Copyright &copy; 2019 The Apache Software Foundation.
<p class="small">
Apache Kudu, Kudu, Apache, the Apache feather logo, and the Apache Kudu
project logo are either registered trademarks or trademarks of The
Apache Software Foundation in the United States and other countries.
<div class="col-md-3">
<a class="pull-right" href="">
<img src=""/>
<script src=""></script>
// Try to detect touch-screen devices. Note: Many laptops have touch screens.
$(document).ready(function() {
if ("ontouchstart" in document.documentElement) {
} else {
<script src=""
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
ga('create', 'UA-68448017-1', 'auto');
ga('send', 'pageview');
<script src=""></script>
anchors.options = {
placement: 'right',
visible: 'touch',