content/releases/qpid-broker-j-9.2.1/book/Java-Broker-Appendix-Queue-Alerts.html (128 lines of code) (raw):

<!DOCTYPE html> <!-- - - Licensed to the Apache Software Foundation (ASF) under one - or more contributor license agreements. See the NOTICE file - distributed with this work for additional information - regarding copyright ownership. The ASF licenses this file - to you 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. - --> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta charset="UTF-8"> <title>Appendix E. Queue Alerts - Apache Qpid&#8482;</title> <meta http-equiv="X-UA-Compatible" content="IE=edge"/> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <link rel="stylesheet" href="/site.css" type="text/css" async="async"/> <link rel="stylesheet" href="/deferred.css" type="text/css" defer="defer"/> <script type="text/javascript">var _deferredFunctions = [];</script> <script type="text/javascript" src="/deferred.js" defer="defer"></script> <!--[if lte IE 8]> <link rel="stylesheet" href="/ie.css" type="text/css"/> <script type="text/javascript" src="/html5shiv.js"></script> <![endif]--> <!-- Redirects for `go get` and godoc.org --> <meta name="go-import" content="qpid.apache.org git https://gitbox.apache.org/repos/asf/qpid-proton.git"/> <meta name="go-source" content="qpid.apache.org https://github.com/apache/qpid-proton/blob/go1/README.md https://github.com/apache/qpid-proton/tree/go1{/dir} https://github.com/apache/qpid-proton/blob/go1{/dir}/{file}#L{line}"/> </head> <body> <div id="-content"> <div id="-top" class="panel"> <a id="-menu-link"><img width="16" height="16" src="" alt="Menu"/></a> <a id="-search-link"><img width="22" height="16" src="" alt="Search"/></a> <ul id="-global-navigation"> <li><a id="-logotype" href="/index.html">Apache Qpid<sup>&#8482;</sup></a></li> <li><a href="/documentation.html">Documentation</a></li> <li><a href="/download.html">Download</a></li> <li><a href="/discussion.html">Discussion</a></li> </ul> </div> <div id="-menu" class="panel" style="display: none;"> <div class="flex"> <section> <h3>Project</h3> <ul> <li><a href="/overview.html">Overview</a></li> <li><a href="/components/index.html">Components</a></li> <li><a href="/releases/index.html">Releases</a></li> </ul> </section> <section> <h3>Messaging APIs</h3> <ul> <li><a href="/proton/index.html">Qpid Proton</a></li> <li><a href="/components/jms/index.html">Qpid JMS</a></li> <li><a href="/components/messaging-api/index.html">Qpid Messaging API</a></li> </ul> </section> <section> <h3>Servers and tools</h3> <ul> <li><a href="/components/broker-j/index.html">Broker-J</a></li> <li><a href="/components/cpp-broker/index.html">C++ broker</a></li> <li><a href="/components/dispatch-router/index.html">Dispatch router</a></li> </ul> </section> <section> <h3>Resources</h3> <ul> <li><a href="/dashboard.html">Dashboard</a></li> <li><a href="https://cwiki.apache.org/confluence/display/qpid/Index">Wiki</a></li> <li><a href="/resources.html">More resources</a></li> </ul> </section> </div> </div> <div id="-search" class="panel" style="display: none;"> <form action="http://www.google.com/search" method="get"> <input type="hidden" name="sitesearch" value="qpid.apache.org"/> <input type="text" name="q" maxlength="255" autofocus="autofocus" tabindex="1"/> <button type="submit">Search</button> <a href="/search.html">More ways to search</a> </form> </div> <div id="-middle" class="panel"> <ul id="-path-navigation"><li><a href="/index.html">Home</a></li><li><a href="/releases/index.html">Releases</a></li><li><a href="/releases/qpid-broker-j-9.2.1/index.html">Qpid Broker-J 9.2.1</a></li><li><a href="/releases/qpid-broker-j-9.2.1/book/index.html">Apache Qpid Broker-J</a></li><li>Appendix E. Queue Alerts</li></ul> <div id="-middle-content"> <div class="docbook"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Appendix E. Queue Alerts</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apds03.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="Java-Broker-Miscellaneous.html">Next</a></td></tr></table><hr /></div><div class="appendix"><div class="titlepage"><div><div><h1 class="title"><a id="Java-Broker-Appendix-Queue-Alerts"></a>Appendix E. Queue Alerts</h1></div></div></div><p>The Broker supports a variety of queue alerting thresholds. Once configured on a queue, these limits will be periodically written to the log if these limits are breached, until the condition is rectified.</p><p>For example, if queue <code class="literal">myqueue</code> is configured with a message count alert of 1000, and then owing to a failure of a downstream system messages begin to accumulate on the queue, the following alerts will be written periodically to the log. </p><pre class="screen">INFO [default:VirtualHostHouseKeepingTask] (queue.NotificationCheck) - MESSAGE_COUNT_ALERT On Queue myqueue - 1272: Maximum count on queue threshold (1000) breached. </pre><p>Note that queue alerts are <span class="emphasis"><em>soft</em></span> in nature; breaching the limit will merely cause the alerts to be generated but messages will still be accepted to the queue.</p><div class="table"><a id="Java-Broker-Appendix-Queue-Alerts-Alerting-Messages"></a><p class="title"><strong>Table E.1. Queue Alerts</strong></p><div class="table-contents"><table class="table" summary="Queue Alerts" width="100%" border="1"><colgroup><col class="alertname" /><col class="purpose" /></colgroup><thead><tr><th>Alert Name</th><th>Alert Format and Purpose</th></tr></thead><tbody><tr><td rowspan="2">MESSAGE_COUNT_ALERT</td><td> MESSAGE_COUNT_ALERT On Queue <em class="replaceable"><code>queuename</code></em> - <em class="replaceable"><code>number of messages</code></em>: Maximum count on queue threshold (<em class="replaceable"><code>limit</code></em>) breached. </td></tr><tr><td> <p>The number of messages on the given queue has breached its configured limit.</p> </td></tr><tr><td rowspan="2">MESSAGE_SIZE_ALERT</td><td> MESSAGE_SIZE_ALERT On Queue <em class="replaceable"><code>queuename</code></em> -<em class="replaceable"><code>message size</code></em> : Maximum message size threshold (<em class="replaceable"><code>limit</code></em>) breached. [Message ID=<em class="replaceable"><code>message id</code></em>]</td></tr><tr><td> <p>The size of an individual messages has breached its configured limit.</p> </td></tr><tr><td rowspan="2">QUEUE_DEPTH_ALERT</td><td> QUEUE_DEPTH_ALERT On Queue <em class="replaceable"><code>queuename</code></em> - <em class="replaceable"><code>total size of all messages on queue</code></em> : Maximum queue depth threshold (<em class="replaceable"><code>limit</code></em>) breached.</td></tr><tr><td> <p>The total size of all messages on the queue has breached its configured limit.</p> </td></tr><tr><td rowspan="2">MESSAGE_AGE_ALERT</td><td>MESSAGE_AGE_ALERT On Queue <em class="replaceable"><code>queuename</code></em> - <em class="replaceable"><code>age of message</code></em> : Maximum age on queue threshold (<em class="replaceable"><code>limit</code></em>) breached. </td></tr><tr><td> <p>The age of a message on the given queue has breached its configured limit.</p> </td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="apds03.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="Java-Broker-Miscellaneous.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">D.3. Examples </td><td width="20%" align="center"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td width="40%" align="right" valign="top"> Appendix F. Miscellaneous</td></tr></table></div></div> <hr/> <ul id="-apache-navigation"> <li><a href="http://www.apache.org/">Apache</a></li> <li><a href="http://www.apache.org/licenses/">License</a></li> <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li> <li><a href="http://www.apache.org/foundation/thanks.html">Thanks!</a></li> <li><a href="/security.html">Security</a></li> <li><a href="http://www.apache.org/"><img id="-apache-feather" width="48" height="14" src="" alt="Apache"/></a></li> </ul> <p id="-legal"> Apache Qpid, Messaging built on AMQP; Copyright &#169; 2015 The Apache Software Foundation; Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>; Apache Qpid, Qpid, Qpid Proton, Proton, Apache, the Apache feather logo, and the Apache Qpid project logo are trademarks of The Apache Software Foundation; All other marks mentioned may be trademarks or registered trademarks of their respective owners </p> </div> </div> </div> </body> </html>