| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <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 1.4.0 Release Notes</title> |
| <!-- Bootstrap core CSS --> |
| <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" |
| integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" |
| crossorigin="anonymous"> |
| |
| <!-- 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="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.1/css/font-awesome.min.css" /> |
| |
| |
| |
| <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries --> |
| <!--[if lt IE 9]> |
| <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script> |
| <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> |
| <![endif]--> |
| </head> |
| <body> |
| <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> |
| </button> |
| |
| <a class="logo" href="/"><img |
| src="//d3dr9sfxru4sde.cloudfront.net/i/k/apachekudu_logo_0716_80px.png" |
| srcset="//d3dr9sfxru4sde.cloudfront.net/i/k/apachekudu_logo_0716_80px.png 1x, //d3dr9sfxru4sde.cloudfront.net/i/k/apachekudu_logo_0716_160px.png 2x" |
| alt="Apache Kudu"/></a> |
| |
| </div> |
| <div id="navbar" class="collapse navbar-collapse"> |
| <ul class="nav navbar-nav navbar-right"> |
| <li > |
| <a href="/">Home</a> |
| </li> |
| <li > |
| <a href="/overview.html">Overview</a> |
| </li> |
| <li class="active"> |
| <a href="/docs/">Documentation</a> |
| </li> |
| <li > |
| <a href="/releases/">Download</a> |
| </li> |
| <li > |
| <a href="/blog/">Blog</a> |
| </li> |
| <!-- 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="https://getkudu-slack.herokuapp.com/">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="https://github.com/apache/incubator-kudu">GitHub</a></li> |
| <li><a class="icon gerrit" href="http://gerrit.cloudera.org:8080/#/q/status:open+project:kudu">Gerrit Code Review</a></li> |
| <li><a class="icon jira" href="https://issues.apache.org/jira/browse/KUDU">JIRA Issue Tracker</a></li> |
| <li role="separator" class="divider"></li> |
| <li class="dropdown-header">SOCIAL MEDIA</li> |
| <li><a class="icon twitter" href="https://twitter.com/ApacheKudu">Twitter</a></li> |
| </ul> |
| </li> |
| <li > |
| <a href="/faq.html">FAQ</a> |
| </li> |
| </ul><!-- /.nav --> |
| </div><!-- /#navbar --> |
| </div><!-- /.container-fluid --> |
| </nav> |
| |
| <!-- |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| |
| |
| <div class="container"> |
| <div class="row"> |
| <div class="col-md-9"> |
| |
| <h1>Apache Kudu 1.4.0 Release Notes</h1> |
| <div class="sect1"> |
| <h2 id="rn_1.4.0_new_features"><a class="link" href="#rn_1.4.0_new_features">New features</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>The C++ and Java client libraries now support the ability to alter the |
| storage attributes (e.g. encoding and compression) and default value |
| of existing columns. Additionally, it is now possible to rename |
| a column which is part of a table’s primary key.</p> |
| </li> |
| <li> |
| <p>The C++ client library now includes an experimental <code>KuduPartitioner</code> API which may |
| be used to efficiently map rows to their associated partitions and hosts. |
| This may be used to achieve better locality or distribution of writes |
| in client applications.</p> |
| </li> |
| <li> |
| <p>The Java client library now supports enabling fault tolerance on scanners. |
| Fault tolerant scanners are able to transparently recover from concurrent |
| server crashes at the cost of some performance overhead. See the Java |
| API documentation for more details on usage.</p> |
| </li> |
| <li> |
| <p>The <code>kudu</code> command line tool now includes a new advanced administrative |
| command <code>kudu remote_replica unsafe_change_config</code>. This command may be used |
| to force a tablet to perform an unsafe change of its Raft replication |
| configuration. This can be used to recover from scenarios such as a loss |
| of a majority of replicas, at the risk of losing edits.</p> |
| </li> |
| <li> |
| <p>The <code>kudu</code> command line tool now includes the <code>kudu fs check</code> command |
| which performs various offline consistency checks on the local on-disk |
| storage of a Kudu Tablet Server or Master. In addition to detecting |
| various inconsistencies or corruptions, it can also detect and remove |
| data blocks that are no longer referenced by any tablet but were not |
| fully removed from disk due to a crash or a bug in prior versions of Kudu.</p> |
| </li> |
| <li> |
| <p>The <code>kudu</code> command line tool can now be used to list the addresses and |
| identifiers of the servers in the cluster using either <code>kudu master list</code> |
| or <code>kudu tserver list</code>.</p> |
| </li> |
| <li> |
| <p>Kudu 1.4 now includes the optional ability to compute, store, and verify |
| checksums on all pieces of data stored on a server. Prior versions only |
| performed checksums on certain portions of the stored data. This feature |
| is not enabled by default since it makes a backward-incompatible change |
| to the on-disk formats and thus prevent downgrades. Kudu 1.5 will enable |
| the feature by default.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_optimizations_and_improvements"><a class="link" href="#_optimizations_and_improvements">Optimizations and improvements</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>kudu cluster ksck</code> now detects and reports new classes of |
| inconsistencies and issues. In particular, it is better able to |
| detect cases where a configuration change such as a replica eviction |
| or addition is pending but is unable to be committed. It also now |
| properly detects and reports cases where a tablet has no elected |
| leader.</p> |
| </li> |
| <li> |
| <p>The default size for Write Ahead Log (WAL) segments has been reduced |
| from 64MB to 8MB. Additionally, in the case that all replicas of a |
| tablet are fully up to date and data has been flushed from memory, |
| servers will now retain only a single WAL segment rather than |
| two. These changes are expected to reduce the average consumption of |
| disk space on the configured WAL disk by 16x, as well as improve the |
| startup speed of tablet servers by reducing the number and size of |
| WAL segments that need to be re-read.</p> |
| </li> |
| <li> |
| <p>The default on-disk storage system used by Kudu servers (Log Block Manager) |
| has been improved to compact its metadata and remove dead containers. |
| This compaction and garbage collection occurs only at startup. Thus, the |
| first startup after upgrade is expected to be longer than usual, and |
| subsequent restarts should be shorter.</p> |
| </li> |
| <li> |
| <p>The usability of the Kudu web interfaces has been improved, |
| particularly for the case where a server hosts many tablets or a |
| table has many partitions. Pages that list tablets now include |
| a top-level summary of tablet status and show the complete list |
| under a toggleable section.</p> |
| </li> |
| <li> |
| <p>The Maintenance Manager has been improved to improve utilization of the |
| configured maintenance threads. Previously, maintenance work would |
| only be scheduled a maximum of 4 times per second, but now maintenance |
| work will be scheduled immediately whenever any configured thread is |
| available. This can improve the throughput of write-heavy workloads.</p> |
| </li> |
| <li> |
| <p>The Maintenance Manager will now aggressively schedule flushes of |
| in-memory data when memory consumption crosses 60% of the configured |
| process-wide memory limit. The backpressure mechanism which begins |
| to throttle client writes has been accordingly adjusted to not begin |
| throttling until reaching 80% of the configured limit. These two |
| changes together result in improved write throughput, more consistent |
| latency, and fewer timeouts due to memory exhaustion.</p> |
| </li> |
| <li> |
| <p>Many performance improvements were made to write performance. Applications |
| which send large batches of writes to Kudu should see substantially |
| improved throughput in Kudu 1.4.</p> |
| </li> |
| <li> |
| <p>Several improvements were made to reduce the memory consumption of |
| Kudu Tablet Servers which hold large volumes of data. The specific |
| amount of memory saved varies depending on workload, but the expectation |
| is that approximately 350MB of excess peak memory usage has been eliminated |
| per TB of data stored.</p> |
| </li> |
| <li> |
| <p>The number of threads used by the Kudu Tablet Server has been reduced. |
| Previously, each tablet used a dedicated thread to append to its WAL. |
| Those threads now automatically stop running if there is no activity |
| on a given tablet for a short period of time.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="rn_1.4.0_fixed_issues"><a class="link" href="#rn_1.4.0_fixed_issues">Fixed Issues</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="https://issues.apache.org/jira/browse/KUDU-2020">KUDU-2020</a> |
| Fixed an issue where re-replication after a failure would proceed |
| significantly slower than expected. This bug caused many tablets |
| to be unnecessarily copied multiple times before successfully |
| being considered re-replicated, resulting in significantly more |
| network and IO bandwidth usage than expected. Mean time to recovery |
| on clusters with large amounts of data is improved by up to 10x by this |
| fix.</p> |
| </li> |
| <li> |
| <p><a href="https://issues.apache.org/jira/browse/KUDU-1982">KUDU-1982</a> |
| Fixed an issue where the Java client would call <code>NetworkInterface.getByInetAddress</code> |
| very often, causing performance problems particularly on Windows |
| where this function can be quite slow.</p> |
| </li> |
| <li> |
| <p><a href="https://issues.apache.org/jira/browse/KUDU-1755">KUDU-1755</a> |
| Improved the accuracy of the <code>on_disk_size</code> replica metrics to |
| include the size consumed by bloom filters, primary key indexes, |
| and superblock metadata, and delta files. Note that, because the size |
| metric is now more accurate, the reported values are expected to |
| increase after upgrading to Kudu 1.4. This does not indicate that |
| replicas are using more space after the upgrade; rather, it is |
| now accurately reporting the amount of space that has always been |
| used.</p> |
| </li> |
| <li> |
| <p><a href="https://issues.apache.org/jira/browse/KUDU-1192">KUDU-1192</a> |
| Kudu servers will now periodically flush their log messages to disk |
| even if no <code>WARNING</code>-level messages have been logged. This makes it |
| easier to tail the logs to see progress output during normal startup.</p> |
| </li> |
| <li> |
| <p><a href="https://issues.apache.org/jira/browse/KUDU-1999">KUDU-1999</a> |
| Fixed the ability to run Spark jobs in "cluster" mode against |
| Kudu clusters secured by Kerberos.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="rn_1.4.0_wire_compatibility"><a class="link" href="#rn_1.4.0_wire_compatibility">Wire Protocol compatibility</a></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Kudu 1.4.0 is wire-compatible with previous versions of Kudu:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Kudu 1.4 clients may connect to servers running Kudu 1.0 or later. If the client uses |
| features that are not available on the target server, an error will be returned.</p> |
| </li> |
| <li> |
| <p>Kudu 1.0 clients may connect to servers running Kudu 1.4 with the exception of the |
| below-mentioned restrictions regarding secure clusters.</p> |
| </li> |
| <li> |
| <p>Rolling upgrade between Kudu 1.3 and Kudu 1.4 servers is believed to be possible |
| though has not been sufficiently tested. Users are encouraged to shut down all nodes |
| in the cluster, upgrade the software, and then restart the daemons on the new version.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The authentication features introduced in Kudu 1.3 place the following limitations |
| on wire compatibility between Kudu 1.4 and versions earlier than 1.3:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>If a Kudu 1.4 cluster is configured with authentication or encryption set to "required", |
| clients older than Kudu 1.3 will be unable to connect.</p> |
| </li> |
| <li> |
| <p>If a Kudu 1.4 cluster is configured with authentication and encryption set to "optional" |
| or "disabled", older clients will still be able to connect.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="rn_1.4.0_incompatible_changes"><a class="link" href="#rn_1.4.0_incompatible_changes">Incompatible Changes in Kudu 1.4.0</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Kudu servers, by default, will now only allow unencrypted or unauthenticated connections |
| from trusted subnets, which are private networks (127.0.0.0/8,10.0.0.0/8,172.16.0.0/12, |
| 192.168.0.0/16,169.254.0.0/16) and local subnets of all local network interfaces. |
| Unencrypted or unauthenticated connections from publicly routable IPs will be rejected, |
| even if encryption and authentication are not configured.</p> |
| <div class="paragraph"> |
| <p>The trusted subnets can be configured using the <code>--trusted_subnets</code> flag, which can be set |
| to IP blocks represented in CIDR notation separated by comma. Set it to '0.0.0.0/0' to |
| allow unauthenticated connections from all remote IP addresses. However, if network access |
| is not otherwise restricted by a firewall, malicious users may be able to gain unauthorized |
| access. This can be mitigated if authentication and encryption are configured to be |
| required.</p> |
| </div> |
| </li> |
| </ul> |
| </div> |
| <div class="sect2"> |
| <h3 id="rn_1.4.0_client_compatibility"><a class="link" href="#rn_1.4.0_client_compatibility">Client Library Compatibility</a></h3> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>The Kudu 1.4 Java client library is API- and ABI-compatible with Kudu 1.3. Applications |
| written against Kudu 1.3 will compile and run against the Kudu 1.4 client library and |
| vice-versa, unless one of the following newly added APIs is used:</p> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>[Async]KuduScannerBuilder.setFaultTolerant(…​)</code></p> |
| </li> |
| <li> |
| <p>New methods in <code>AlterTableOptions</code>: <code>removeDefault</code>, <code>changeDefault</code>, <code>changeDesiredBlockSize</code>, |
| <code>changeEncoding</code>, <code>changeCompressionAlgorithm</code></p> |
| </li> |
| <li> |
| <p><code>KuduClient.updateLastPropagatedTimestamp</code></p> |
| </li> |
| <li> |
| <p><code>KuduClient.getLastPropagatedTimestamp</code></p> |
| </li> |
| <li> |
| <p>New getters in <code>PartialRow</code>: <code>getBoolean</code>, <code>getByte</code>, <code>getShort</code>, <code>getInt</code>, <code>getLong</code>, |
| <code>getFloat</code>, <code>getDouble</code>, <code>getString</code>, <code>getBinaryCopy</code>, <code>getBinary</code>, <code>isNull</code>, |
| <code>isSet</code>.</p> |
| </li> |
| </ul> |
| </div> |
| </li> |
| <li> |
| <p>The Kudu 1.4 C++ client is API- and ABI-forward-compatible with Kudu 1.3. |
| Applications written and compiled against the Kudu 1.3 client library will run without |
| modification against the Kudu 1.4 client library. Applications written and compiled |
| against the Kudu 1.4 client library will run without modification against the Kudu 1.3 |
| client library unless they use one of the following new APIs:</p> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>KuduPartitionerBuilder</code></p> |
| </li> |
| <li> |
| <p>`KuduPartitioner</p> |
| </li> |
| <li> |
| <p><code>KuduScanner::SetRowFormatFlags</code> (unstable API)</p> |
| </li> |
| <li> |
| <p><code>KuduScanBatch::direct_data</code>, <code>KuduScanBatch::indirect_data</code> (unstable API)</p> |
| </li> |
| </ul> |
| </div> |
| </li> |
| <li> |
| <p>The Kudu 1.4 Python client is API-compatible with Kudu 1.3. Applications |
| written against Kudu 1.3 will continue to run against the Kudu 1.4 client |
| and vice-versa.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="rn_1.4.0_known_issues"><a class="link" href="#rn_1.4.0_known_issues">Known Issues and Limitations</a></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Please refer to the <a href="known_issues.html">Known Issues and Limitations</a> section of the |
| documentation.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="resources_and_next_steps"><a class="link" href="#resources_and_next_steps">Resources</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="http://kudu.apache.org">Kudu Website</a></p> |
| </li> |
| <li> |
| <p><a href="http://github.com/apache/kudu">Kudu GitHub Repository</a></p> |
| </li> |
| <li> |
| <p><a href="index.html">Kudu Documentation</a></p> |
| </li> |
| <li> |
| <p><a href="prior_release_notes.html">Release notes for older releases</a></p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_installation_options"><a class="link" href="#_installation_options">Installation Options</a></h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>For full installation details, see <a href="installation.html">Kudu Installation</a>.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_next_steps"><a class="link" href="#_next_steps">Next Steps</a></h2> |
| <div class="sectionbody"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><a href="quickstart.html">Kudu Quickstart</a></p> |
| </li> |
| <li> |
| <p><a href="installation.html">Installing Kudu</a></p> |
| </li> |
| <li> |
| <p><a href="configuration.html">Configuring Kudu</a></p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="col-md-3"> |
| |
| <div id="toc" data-spy="affix" data-offset-top="70"> |
| <ul> |
| |
| <li> |
| |
| <a href="index.html">Introducing Kudu</a> |
| </li> |
| <li> |
| <span class="active-toc">Kudu Release Notes</span> |
| <ul class="sectlevel1"> |
| <li><a href="#rn_1.4.0_new_features">New features</a></li> |
| <li><a href="#_optimizations_and_improvements">Optimizations and improvements</a></li> |
| <li><a href="#rn_1.4.0_fixed_issues">Fixed Issues</a></li> |
| <li><a href="#rn_1.4.0_wire_compatibility">Wire Protocol compatibility</a></li> |
| <li><a href="#rn_1.4.0_incompatible_changes">Incompatible Changes in Kudu 1.4.0</a> |
| <ul class="sectlevel2"> |
| <li><a href="#rn_1.4.0_client_compatibility">Client Library Compatibility</a></li> |
| </ul> |
| </li> |
| <li><a href="#rn_1.4.0_known_issues">Known Issues and Limitations</a></li> |
| <li><a href="#resources_and_next_steps">Resources</a></li> |
| <li><a href="#_installation_options">Installation Options</a></li> |
| <li><a href="#_next_steps">Next Steps</a></li> |
| </ul> |
| </li> |
| <li> |
| |
| <a href="quickstart.html">Getting Started with Kudu</a> |
| </li> |
| <li> |
| |
| <a href="installation.html">Installation Guide</a> |
| </li> |
| <li> |
| |
| <a href="configuration.html">Configuring Kudu</a> |
| </li> |
| <li> |
| |
| <a href="kudu_impala_integration.html">Using Impala with Kudu</a> |
| </li> |
| <li> |
| |
| <a href="administration.html">Administering Kudu</a> |
| </li> |
| <li> |
| |
| <a href="troubleshooting.html">Troubleshooting Kudu</a> |
| </li> |
| <li> |
| |
| <a href="developing.html">Developing Applications with Kudu</a> |
| </li> |
| <li> |
| |
| <a href="schema_design.html">Kudu Schema Design</a> |
| </li> |
| <li> |
| |
| <a href="security.html">Kudu Security</a> |
| </li> |
| <li> |
| |
| <a href="transaction_semantics.html">Kudu Transaction Semantics</a> |
| </li> |
| <li> |
| |
| <a href="background_tasks.html">Background Maintenance Tasks</a> |
| </li> |
| <li> |
| |
| <a href="configuration_reference.html">Kudu Configuration Reference</a> |
| </li> |
| <li> |
| |
| <a href="command_line_tools_reference.html">Kudu Command Line Tools Reference</a> |
| </li> |
| <li> |
| |
| <a href="known_issues.html">Known Issues and Limitations</a> |
| </li> |
| <li> |
| |
| <a href="contributing.html">Contributing to Kudu</a> |
| </li> |
| <li> |
| |
| <a href="export_control.html">Export Control Notice</a> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| </div> |
| <footer class="footer"> |
| <p class="small"> |
| Copyright © 2016 The Apache Software Foundation. Last updated 2017-06-08 18:46:50 PDT |
| </p> |
| </footer> |
| </div> |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script> |
| <script> |
| // Try to detect touch-screen devices. Note: Many laptops have touch screens. |
| $(document).ready(function() { |
| if ("ontouchstart" in document.documentElement) { |
| $(document.documentElement).addClass("touch"); |
| } else { |
| $(document.documentElement).addClass("no-touch"); |
| } |
| }); |
| </script> |
| <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" |
| integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" |
| crossorigin="anonymous"></script> |
| <script> |
| (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ |
| (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), |
| m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) |
| })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); |
| |
| ga('create', 'UA-68448017-1', 'auto'); |
| ga('send', 'pageview'); |
| </script> |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/anchor-js/3.1.0/anchor.js"></script> |
| <script> |
| anchors.options = { |
| placement: 'right', |
| visible: 'touch', |
| }; |
| anchors.add(); |
| </script> |
| </body> |
| </html> |
| |
