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.mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Apache RocketMQ</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Apache_RocketMQ_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Apache_RocketMQ_logo.svg/220px-Apache_RocketMQ_logo.svg.png" decoding="async" width="220" height="303" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Apache_RocketMQ_logo.svg/330px-Apache_RocketMQ_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/89/Apache_RocketMQ_logo.svg/440px-Apache_RocketMQ_logo.svg.png 2x" data-file-width="130" data-file-height="179" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data">Apache Software Foundation</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">2012<span class="noprint">; 12 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">2012</span>)</span></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">5.0.0 / September 9, 2022<span class="noprint">; 2 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">2022-09-09</span>)</span><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://gitbox.apache.org/repos/asf?p=rocketmq.git">RocketMQ Repository</a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Cross-platform" class="mw-redirect" title="Cross-platform">Cross-platform</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Stream_processing" title="Stream processing">Stream processing</a>, <a href="/wiki/Message_broker" title="Message broker">Message broker</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Apache_License_2.0" class="mw-redirect" title="Apache License 2.0">Apache License 2.0</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://rocketmq.apache.org/">rocketmq<wbr />.apache<wbr />.org</a></span></td></tr></tbody></table> <p><b>RocketMQ</b><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> is a distributed messaging and streaming platform with low latency, high performance and reliability, trillion-level capacity and flexible scalability. It is the third generation distributed messaging middleware open sourced by <a href="/wiki/Alibaba_Group" title="Alibaba Group">Alibaba</a> in 2012. On November 21, 2016, Alibaba donated RocketMQ to <a href="/wiki/Apache_Software_Foundation" class="mw-redirect" title="Apache Software Foundation">the Apache Software Foundation</a>. Next year, on February 20, the Apache Software Foundation announced Apache RocketMQ as a Top-Level Project. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The development of RocketMQ can be divided into three stages.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>The first generation uses the push mode in data transportation, and relational database in data storage. It shows low latency in message delivery and meets the command of a typical E-commerce platform<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> with distributed transactions. </p><p>The second generation uses the pull mode in data transportation, and file system in data storage. It paid more attention to stability and reliability, and shows a comparable performance to the first generation in response time and Kafka on log collection. </p><p>The third generation combines the Pull mode with some Push operations. It inherits the advantages of the first and second generation, and shows high performance in concurrency and massive amounts of data scenarios. </p> <div class="mw-heading mw-heading2"><h2 id="Features">Features</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=2" title="Edit section: Features"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Much comparison have been made between the various messaging solutions, and it is widely known that when the number of topics increases dramatically, the throughput of RocketMQ dropped much less than Kafka.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Because the characteristics of high performance, high reliability and high real-time ability, more and more efforts have been made to the combination of RocketMQ and other protocol components in every type of messaging scenarios such as MQTT.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable" width="100%"> <tbody><tr> <th><b><small>Client SDK</small></b> </th> <th><b><small>Protocol and Specification</small></b> </th> <th><b><small>Ordered Message</small></b> </th> <th><b><small>Scheduled Message</small></b> </th> <th><b><small>Batched Message</small></b> </th> <th><b><small>BroadCast Message</small></b> </th> <th><b><small>Message Filter</small></b> </th> <th><b><small>Server Triggered Redelivery</small></b> </th></tr> <tr> <td><small>Java, C/C++, Python, Go, Nodejs</small> </td> <td><small>Pull model, support TCP, JMS, OpenMessaging</small> </td> <td><small>Ensure strict ordering of messages, and can scale out gracefully</small> </td> <td><small>Supported</small> </td> <td><small>Supported, with sync mode to avoid message loss</small> </td> <td><small>Supported</small> </td> <td><small>Supported, property filter expressions based on SQL92</small> </td> <td><small>Supported</small> </td></tr> <tr> <th><b><small>Message Storage</small></b> </th> <th><b><small>Message Retroactive</small></b> </th> <th><b><small>Message Priority</small></b> </th> <th><b><small>High Availability and Failover</small></b> </th> <th><b><small>Message Track</small></b> </th> <th><b><small>Configuration</small></b> </th></tr> <tr> <td><small>High performance and low latency file storage</small> </td> <td><small>Supported timestamp and offset two indicates</small> </td> <td><small>Not Supported</small> </td> <td><small>Supported, Master-Slave model, without another kit</small> </td> <td><small>Supported</small> </td> <td><small>Work out of box,user only need to pay attention to a few configurations</small> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Architecture">Architecture</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=3" title="Edit section: Architecture"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-left" typeof="mw:File"><a href="/wiki/File:Rmq-structure.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Rmq-structure.png/809px-Rmq-structure.png" decoding="async" width="809" height="373" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/a/a2/Rmq-structure.png 1.5x" data-file-width="925" data-file-height="426" /></a><figcaption></figcaption></figure> <p>RocketMQ consists of four parts: name servers, brokers, producers and consumers. Each of them can be horizontally extended without a single point of Failure. As shown in image left. </p> <div class="mw-heading mw-heading3"><h3 id="NameServer_Cluster">NameServer Cluster</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=4" title="Edit section: NameServer Cluster"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The lightweight component for service discovery and they can be used to read and write routing information. Each one records global information, and supports fast storage expansion. </p> <div class="mw-heading mw-heading3"><h3 id="Broker_Cluster">Broker Cluster</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=5" title="Edit section: Broker Cluster"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>They use lightweight TOPIC and QUEUE mechanisms to manage data storage. To realize fault tolerance, two copies or three copies of data are provided. And Client can get message in Push and Pull model. In addition, disaster recovery and rich metrics statistics are also supported. </p> <div class="mw-heading mw-heading3"><h3 id="Producer_Cluster">Producer Cluster</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=6" title="Edit section: Producer Cluster"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Producers can be distributed deployed, and messages from producers to brokers can be balanced through multi-path. In addition, fast failure and low latency are supported. </p> <div class="mw-heading mw-heading3"><h3 id="Consumer_Cluster">Consumer Cluster</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=7" title="Edit section: Consumer Cluster"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Consumers can also be distributed deployed in the push and pull model, and they can subscribe message real-time, consume message in the unit of cluster. Message broadcasting is also supported. </p> <div class="mw-heading mw-heading2"><h2 id="Applications">Applications</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=8" title="Edit section: Applications"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>There are at least five aspects Apache RocketMQ could relate to: </p> <ul><li>The integration of heterogeneous systems;</li> <li>Decoupling between applications;</li> <li>Backbone in the event-driven mechanism and complex event architecture model;</li> <li>Data replication channels;</li> <li>Integration with flow calculation engine;</li> <li>Stream data access.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Community_Maintenance">Community Maintenance</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=9" title="Edit section: Community Maintenance"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The RocketMQ team has done much to keep the community active. Meetups, workshops, ApacheCon and Code Marathons are regularly held in Beijing, Shenzhen and Hangzhou to attract new contributors and committers. The OpenMessaging benchmarking suites are available for RocketMQ now, helping RocketMQ keep pace with the global standard for distributed messaging.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> As for version management, a series of standardized software development processes have been adopted. The latest version is 4.2.0, with 4.3.0 on the way. More information can be obtained <a rel="nofollow" class="external text" href="https://github.com/apache/rocketmq">here</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Awards">Awards</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=10" title="Edit section: Awards"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a rel="nofollow" class="external text" href="https://www.oschina.net/question/2886655_2216338">2016 China's most popular open source software award</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180619063413/https://www.oschina.net/question/2886655_2216338">Archived</a> 2018-06-19 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </p><p><a rel="nofollow" class="external text" href="https://www.oschina.net/question/2896879_2271735">2017 China's most popular open source software award</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180619063522/https://www.oschina.net/question/2896879_2271735">Archived</a> 2018-06-19 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </p><p><a rel="nofollow" class="external text" href="http://www.copu.org.cn/new/266">16th CJK(China-Japan-South Korea) open source software outstanding technology award</a> </p><p><a rel="nofollow" class="external text" href="https://www.oschina.net/question/2896879_2290300?sort=default&">2018 China's most popular open source software award</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190102143223/https://www.oschina.net/question/2896879_2290300?sort=default&">Archived</a> 2019-01-02 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </p><p><a rel="nofollow" class="external text" href="https://www.oschina.net/question/2918182_2313492">2019 China's most popular open source software award</a> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=11" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col" style="column-width: 15em;"> <ul><li><a href="/wiki/Apache_ActiveMQ" title="Apache ActiveMQ">Apache ActiveMQ</a></li> <li><a href="/wiki/Apache_Flink" title="Apache Flink">Apache Flink</a></li> <li><a href="/wiki/Apache_Qpid" title="Apache Qpid">Apache Qpid</a></li> <li><a href="/wiki/Apache_Samza" title="Apache Samza">Apache Samza</a></li> <li><a href="/wiki/Apache_Spark" title="Apache Spark">Apache Spark Streaming</a></li> <li><a href="/wiki/Data_Distribution_Service" title="Data Distribution Service">Data Distribution Service</a></li> <li><a href="/wiki/Enterprise_Integration_Patterns" title="Enterprise Integration Patterns">Enterprise Integration Patterns</a></li> <li><a href="/wiki/Enterprise_messaging_system" title="Enterprise messaging system">Enterprise messaging system</a></li> <li><a href="/wiki/Event_stream_processing" class="mw-redirect" title="Event stream processing">Streaming analytics</a></li> <li><a href="/wiki/Event-driven_SOA" title="Event-driven SOA">Event-driven SOA</a></li> <li><a href="/wiki/Message-oriented_middleware" title="Message-oriented middleware">Message-oriented middleware</a></li> <li><a href="/wiki/Service-oriented_architecture" title="Service-oriented architecture">Service-oriented architecture</a></li> <li><a href="/wiki/Apache_Kafka" title="Apache Kafka">Apache Kafka</a></li></ul></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_RocketMQ&action=edit&section=12" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output 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title="Apache Felix">Felix</a></li> <li><a href="/wiki/Apache_Flex" title="Apache Flex">Flex</a></li> <li><a href="/wiki/Apache_Flink" title="Apache Flink">Flink</a></li> <li><a href="/wiki/Apache_Flume" class="mw-redirect" title="Apache Flume">Flume</a></li> <li><a href="/wiki/FreeMarker" title="FreeMarker">FreeMarker</a></li> <li><a href="/wiki/Apache_Geronimo" title="Apache Geronimo">Geronimo</a></li> <li><a href="/wiki/Apache_Groovy" title="Apache Groovy">Groovy</a></li> <li><a href="/wiki/Apache_Guacamole" title="Apache Guacamole">Guacamole</a></li> <li><a href="/wiki/Apache_Gump" title="Apache Gump">Gump</a></li> <li><a href="/wiki/Apache_Hadoop" title="Apache Hadoop">Hadoop</a></li> <li><a href="/wiki/Apache_HBase" title="Apache HBase">HBase</a></li> <li><a href="/wiki/Apache_Helix" title="Apache Helix">Helix</a></li> <li><a href="/wiki/Apache_Hive" title="Apache Hive">Hive</a></li> <li><a href="/wiki/Apache_Iceberg" title="Apache Iceberg">Iceberg</a></li> <li><a href="/wiki/Apache_Ignite" title="Apache Ignite">Ignite</a></li> <li><a href="/wiki/Apache_Impala" title="Apache Impala">Impala</a></li> <li><a href="/wiki/Apache_Jackrabbit" title="Apache Jackrabbit">Jackrabbit</a></li> <li><a href="/wiki/Apache_James" title="Apache James">James</a></li> <li><a href="/wiki/Apache_Jena" title="Apache Jena">Jena</a></li> <li><a href="/wiki/Apache_JMeter" title="Apache JMeter">JMeter</a></li> <li><a href="/wiki/Apache_Kafka" title="Apache Kafka">Kafka</a></li> <li><a href="/wiki/Apache_Kudu" title="Apache Kudu">Kudu</a></li> <li><a href="/wiki/Apache_Kylin" title="Apache Kylin">Kylin</a></li> <li><a href="/wiki/Apache_Lucene" title="Apache Lucene">Lucene</a></li> <li><a href="/wiki/Apache_Mahout" title="Apache Mahout">Mahout</a></li> <li><a href="/wiki/Apache_Maven" title="Apache Maven">Maven</a></li> <li><a href="/wiki/Apache_MINA" title="Apache MINA">MINA</a></li> <li><a href="/wiki/Mod_perl" title="Mod perl">mod_perl</a></li> <li><a href="/wiki/Apache_MyFaces" title="Apache MyFaces">MyFaces</a></li> <li><a href="/wiki/Apache_Mynewt" title="Apache Mynewt">Mynewt</a></li> <li><a href="/wiki/Apache_NiFi" title="Apache NiFi">NiFi</a></li> <li><a href="/wiki/NetBeans" title="NetBeans">NetBeans</a></li> <li><a href="/wiki/Apache_Nutch" title="Apache Nutch">Nutch</a></li> <li><a href="/wiki/NuttX" title="NuttX">NuttX</a></li> <li><a href="/wiki/Apache_OFBiz" title="Apache OFBiz">OFBiz</a></li> <li><a href="/wiki/Apache_Oozie" title="Apache Oozie">Oozie</a></li> <li><a href="/wiki/Apache_OpenEJB" title="Apache OpenEJB">OpenEJB</a></li> <li><a href="/wiki/Apache_OpenJPA" title="Apache OpenJPA">OpenJPA</a></li> <li><a href="/wiki/Apache_OpenNLP" title="Apache OpenNLP">OpenNLP</a></li> <li><a href="/wiki/Apache_OpenOffice" title="Apache OpenOffice">OрenOffice</a></li> <li><a href="/wiki/Apache_ORC" title="Apache ORC">ORC</a></li> <li><a href="/wiki/Apache_PDFBox" title="Apache PDFBox">PDFBox</a></li> <li><a href="/wiki/Apache_Parquet" title="Apache Parquet">Parquet</a></li> <li><a href="/wiki/Apache_Phoenix" title="Apache Phoenix">Phoenix</a></li> <li><a href="/wiki/Apache_POI" title="Apache POI">POI</a></li> <li><a href="/wiki/Apache_Pig" title="Apache Pig">Pig</a></li> <li><a href="/wiki/Apache_Pinot" title="Apache Pinot">Pinot</a></li> <li><a href="/wiki/Apache_Pivot" title="Apache Pivot">Pivot</a></li> <li><a href="/wiki/Apache_Qpid" title="Apache Qpid">Qpid</a></li> <li><a href="/wiki/Apache_Roller" title="Apache Roller">Roller</a></li> <li><a class="mw-selflink selflink">RocketMQ</a></li> <li><a href="/wiki/Apache_Samza" title="Apache Samza">Samza</a></li> <li><a href="/wiki/Apache_Shiro" title="Apache Shiro">Shiro</a></li> <li><a href="/wiki/Apache_SINGA" title="Apache SINGA">SINGA</a></li> <li><a href="/wiki/Apache_Sling" title="Apache Sling">Sling</a></li> <li><a href="/wiki/Apache_Solr" title="Apache Solr">Solr</a></li> <li><a href="/wiki/Apache_Spark" title="Apache Spark">Spark</a></li> <li><a href="/wiki/Apache_Storm" title="Apache Storm">Storm</a></li> <li><a href="/wiki/Apache_SpamAssassin" title="Apache SpamAssassin">SpamAssassin</a></li> <li><a href="/wiki/Apache_Struts" title="Apache Struts">Struts</a> <ul><li><a href="/wiki/Apache_Struts_1" title="Apache Struts 1">1</a></li></ul></li> <li><a href="/wiki/Apache_Subversion" title="Apache Subversion">Subversion</a></li> <li><a href="/wiki/Apache_Superset" title="Apache Superset">Superset</a></li> <li><a href="/wiki/Apache_SystemDS" title="Apache SystemDS">SystemDS</a></li> <li><a href="/wiki/Apache_Tapestry" title="Apache Tapestry">Tapestry</a></li> <li><a href="/wiki/Apache_Thrift" title="Apache Thrift">Thrift</a></li> <li><a href="/wiki/Apache_Tika" title="Apache Tika">Tika</a></li> <li><a href="/wiki/Apache_TinkerPop" class="mw-redirect" title="Apache TinkerPop">TinkerPop</a></li> <li><a href="/wiki/Apache_Tomcat" title="Apache Tomcat">Tomcat</a></li> <li><a href="/wiki/Apache_Trafodion" class="mw-redirect" title="Apache Trafodion">Trafodion</a></li> <li><a href="/wiki/Apache_Traffic_Server" title="Apache Traffic Server">Traffic Server</a></li> <li><a href="/wiki/UIMA" title="UIMA">UIMA</a></li> <li><a href="/wiki/Apache_Velocity" title="Apache Velocity">Velocity</a></li> <li><a href="/wiki/Apache_Wicket" title="Apache Wicket">Wicket</a></li> <li><a href="/wiki/Apache_Xalan" title="Apache Xalan">Xalan</a></li> <li><a href="/wiki/Apache_Xerces" title="Apache Xerces">Xerces</a></li> <li><a href="/wiki/Apache_XMLBeans" title="Apache XMLBeans">XMLBeans</a></li> <li>Yetus</li> <li><a href="/wiki/Apache_ZooKeeper" title="Apache ZooKeeper">ZooKeeper</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Apache_Commons" title="Apache Commons">Commons</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Byte_Code_Engineering_Library" title="Byte Code Engineering Library">BCEL</a></li> <li><a href="/wiki/Bean_Scripting_Framework" title="Bean Scripting Framework">BSF</a></li> <li><a href="/wiki/Commons_Daemon" title="Commons Daemon">Daemon</a></li> <li><a href="/wiki/Apache_Jelly" title="Apache Jelly">Jelly</a></li> <li><a href="/wiki/Apache_Commons_Logging" title="Apache Commons Logging">Logging</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Incubator</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Taverna" title="Apache Taverna">Taverna</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other projects</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Batik" title="Apache Batik">Batik</a></li> <li><a href="/wiki/Apache_FOP_(Formatting_Objects_Processor)" class="mw-redirect" title="Apache FOP (Formatting Objects Processor)">FOP</a></li> <li><a href="/wiki/Apache_Ivy" title="Apache Ivy">Ivy</a></li> <li><a href="/wiki/Log4j" title="Log4j">Log4j</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Attic</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Apex" title="Apache Apex">Apex</a></li> <li><a href="/wiki/AxKit" title="AxKit">AxKit</a></li> <li><a href="/wiki/Apache_Beehive" title="Apache Beehive">Beehive</a></li> <li><a href="/wiki/Apache_iBATIS" title="Apache iBATIS">iBATIS</a></li> <li><a href="/wiki/Apache_Click" title="Apache Click">Click</a></li> <li><a href="/wiki/Apache_Continuum" title="Apache Continuum">Continuum</a></li> <li><a href="/wiki/Deltacloud" title="Deltacloud">Deltacloud</a></li> <li><a href="/wiki/Etch_(protocol)" title="Etch (protocol)">Etch</a></li> <li><a href="/wiki/Apache_Giraph" title="Apache Giraph">Giraph</a></li> <li><a href="/wiki/Apache_Hama" title="Apache Hama">Hama</a></li> <li><a href="/wiki/Apache_Harmony" title="Apache Harmony">Harmony</a></li> <li><a href="/wiki/Jakarta_Project" title="Jakarta Project">Jakarta</a></li> <li><a href="/wiki/Apache_Marmotta" title="Apache Marmotta">Marmotta</a></li> <li><a href="/wiki/Apache_MXNet" title="Apache MXNet">MXNet</a></li> <li><a href="/wiki/Apache_ODE" title="Apache ODE">ODE</a></li> <li><a href="/wiki/Jini" title="Jini">River</a></li> <li><a href="/wiki/Apache_Shale" title="Apache Shale">Shale</a></li> <li><a href="/wiki/Jakarta_Slide" class="mw-redirect" title="Jakarta Slide">Slide</a></li> <li><a href="/wiki/Sqoop" title="Sqoop">Sqoop</a></li> <li><a href="/wiki/Apache_Stanbol" title="Apache Stanbol">Stanbol</a></li> <li><a href="/wiki/Apache_Tuscany" class="mw-redirect" title="Apache Tuscany">Tuscany</a></li> <li><a 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