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| <a href="/docs/2.11.1/services/services" class='' >Using Ignite Services</a> |
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| <a href="/docs/2.11.1/messaging" class='' >Using Ignite Messaging</a> |
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| <li> |
| |
| <a href="/docs/2.11.1/perf-and-troubleshooting/yardstick-benchmarking" |
| class='' |
| >Benchmarking With Yardstick</a> |
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| </li> |
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| <div class="left-nav__overlay"></div> |
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| <article data-swiftype-index='true'> |
| <a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/events/events.adoc" target="_blank">Edit</a> |
| |
| <h1>Events</h1> |
| |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>This page describes different event types, when and where they are generated, and how you can use them.</p> |
| </div> |
| <div class="paragraph"> |
| <p>You can always find the most complete and up to date list of events in the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/EventType.html" target="_blank" rel="noopener">EventType</a> javadoc.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="general-information">General Information</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>All events implement the <code>Event</code> interface. |
| You may want to cast each event to the specific class to get extended information about the action the event was triggered by. |
| For example, the 'cache update' action triggers an event that is an instance of the <code>CacheEvent</code> class, which contains the information about the data that was modified, the ID of the subject that triggered the event, etc.</p> |
| </div> |
| <div class="paragraph"> |
| <p>All events contain information about the node where the event was generated. |
| For example, when you execute an <code>IgniteClosure</code> job, the <code>EVT_JOB_STARTED</code> and <code>EVT_JOB_FINISHED</code> events contain the information about the node where the closure was executed.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteEvents</span> <span class="n">events</span> <span class="o">=</span> <span class="n">ignite</span><span class="o">.</span><span class="na">events</span><span class="o">();</span> |
| |
| <span class="no">UUID</span> <span class="n">uuid</span> <span class="o">=</span> <span class="n">events</span><span class="o">.</span><span class="na">remoteListen</span><span class="o">(</span><span class="k">new</span> <span class="nc">IgniteBiPredicate</span><span class="o"><</span><span class="no">UUID</span><span class="o">,</span> <span class="nc">JobEvent</span><span class="o">>()</span> <span class="o">{</span> |
| <span class="nd">@Override</span> |
| <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">apply</span><span class="o">(</span><span class="no">UUID</span> <span class="n">uuid</span><span class="o">,</span> <span class="nc">JobEvent</span> <span class="n">e</span><span class="o">)</span> <span class="o">{</span> |
| |
| <span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"nodeID = "</span> <span class="o">+</span> <span class="n">e</span><span class="o">.</span><span class="na">node</span><span class="o">().</span><span class="na">id</span><span class="o">()</span> <span class="o">+</span> <span class="s">", addresses="</span> <span class="o">+</span> <span class="n">e</span><span class="o">.</span><span class="na">node</span><span class="o">().</span><span class="na">addresses</span><span class="o">());</span> |
| |
| <span class="k">return</span> <span class="kc">true</span><span class="o">;</span> <span class="c1">//continue listening</span> |
| <span class="o">}</span> |
| <span class="o">},</span> <span class="kc">null</span><span class="o">,</span> <span class="nc">EventType</span><span class="o">.</span><span class="na">EVT_JOB_FINISHED</span><span class="o">);</span></code></pre> |
| </div> |
| </div> |
| <div class="admonitionblock caution"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Caution</div> |
| </td> |
| <td class="content"> |
| <h3 id="event-ordering" class="discrete">Event Ordering</h3> |
| <div class="paragraph"> |
| <p>The order of events in the event listener is not guaranteed to be the same as the order in which they were generated.</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="sect2"> |
| <h3 id="subjectid">SubjectID</h3> |
| <div class="paragraph"> |
| <p>Some events contain the <code>subjectID</code> field, which represents the ID of the entity that initiated the action:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>When the action is initiated by a server or client node, the <code>subjectID</code> is the ID of that node.</p> |
| </li> |
| <li> |
| <p>When the action is done by a thin client, JDBC/ODBC/REST client, the <code>subjectID</code> is generated when the client connects to the cluster and remains the same as long as the client is connected to the cluster.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>Check the specific event class to learn if the <code>subjectID</code> field is present.</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="cluster-state-changed-events">Cluster State Changed Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Cluster state changed events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/ClusterStateChangeEvent.html" target="_blank" rel="noopener">ClusterStateChangeEvent</a> class.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The cluster state changed events are generated when the cluster state changes, which happens either on auto-activation, or when a user changes the state manually. |
| The events contain the new and old states, and the list of baseline nodes after the change.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLUSTER_STATE_CHANGED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The cluster state changed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All cluster nodes.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="cache-lifecycle-events">Cache Lifecycle Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Cache Lifecycle events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/CacheEvent.html" target="_blank" rel="noopener">CacheEvent</a> class. |
| Each cache lifecycle event is associated with a specific cache and has a field that contains the name of the cache.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_STARTED</p></td> |
| <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> |
| <p>A cache is started on a specific node. |
| Each server node holds an internal instance of a cache. |
| This event is fired when the instance is created, which includes the following actions:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>A cluster with existing caches is activated. The event is generated for every cache on all server nodes where the cache is configured.</p> |
| </li> |
| <li> |
| <p>A server node joins the cluster with existing caches (the caches are started on that node).</p> |
| </li> |
| <li> |
| <p>When you create a new cache dynamically by calling <code>Ignite.getOrCreateCache(…​)</code> or similar methods. The event is fired on all nodes that host the cache.</p> |
| </li> |
| <li> |
| <p>When you obtain an instance of a cache on a client node.</p> |
| </li> |
| <li> |
| <p>When you create a cache via the <a href="/docs/2.11.1/sql-reference/ddl#create-table">CREATE TABLE</a> command.</p> |
| </li> |
| </ul> |
| </div></div></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All nodes where the cache is started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_STOPPED</p></td> |
| <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> |
| <p>This event happens when a cache is stopped, which includes the following actions:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>The cluster is deactivated. All caches on all server nodes are stopped.</p> |
| </li> |
| <li> |
| <p><code>IgniteCache.close()</code> is called. The event is triggered on the node where the method is called.</p> |
| </li> |
| <li> |
| <p>A SQL table is dropped.</p> |
| </li> |
| <li> |
| <p>If you call <code>cache = Ignite.getOrCreateCache(…​)</code> and then call <code>Ignite.close()</code>, the <code>cache</code> is also closed on that node.</p> |
| </li> |
| </ul> |
| </div></div></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All nodes where the cache is stopped.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_NODES_LEFT</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All nodes that host a specific cache have left the cluster. This can happen when a cache is deployed on a subset of server nodes or when all server nodes leave the cluster and only client nodes remain.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All remaining nodes.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="cache-events">Cache Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Cache events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/CacheEvent.html">CacheEvent</a> class and |
| represent the operations on cache objects, such as 'get', 'put', 'remove', 'lock', etc.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Each event contains the information about the cache, the key that is accessed by the operation, the value before and after the operation (if applicable), etc.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Cache events are also generated when you use DML commands.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_OBJECT_PUT</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">An object is put to a cache. This event is fired for every invocation of <code>IgniteCache.put()</code>. The bulk operations, such as <code>putAll(…​)</code>, produce multiple events of this type.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary and backup nodes for the entry.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_OBJECT_READ</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">An object is read from a cache. |
| This event is not emitted when you use <a href="/docs/2.11.1/key-value-api/using-scan-queries">scan queries</a> (use <a href="#cache-query-events">Cache Query Events</a> to monitor scan queries).</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where read operation is executed. |
| It can be either the primary or backup node (the latter case is only possible when <a href="/docs/2.11.1/configuring-caches/configuration-overview#readfrombackup">reading from backups is enabled</a>). |
| In transactional caches, the event can be generated on both the primary and backup nodes depending on the concurrency and isolation levels.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_OBJECT_REMOVED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">An object is removed from a cache.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary and backup nodes for the entry.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_OBJECT_LOCKED</p></td> |
| <td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph"> |
| <p>A lock is acquired on a specific key. |
| Locks can be acquired only on keys in transactional caches. |
| User actions that acquire a lock include the following cases:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>The user explicitly acquires a lock by calling <code>IgniteCache.lock()</code> or <code>IgniteCache.lockAll()</code>.</p> |
| </li> |
| <li> |
| <p>A lock is acquired for every atomic (non-transactional) data modifying operation (put, update, remove). |
| In this case, the event is triggered on both primary and backup nodes for the key.</p> |
| </li> |
| <li> |
| <p>Locks are acquired on the keys accessed within a transaction (depending on the <a href="/docs/2.11.1/key-value-api/transactions#concurrency-modes-and-isolation-levels">concurrency and isolation levels</a>).</p> |
| </li> |
| </ul> |
| </div></div></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary or/and backup nodes for the entry depending on the <a href="/docs/2.11.1/key-value-api/transactions#concurrency-modes-and-isolation-levels">concurrency and isolation levels</a>.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_OBJECT_UNLOCKED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A lock on a key is released.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary node for the entry.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_OBJECT_EXPIRED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The event is fired when a cache entry expires. This happens only if an <a href="/docs/2.11.1/configuring-caches/expiry-policies">expiry policy</a> is configured.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary and backup nodes for the entry.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_ENTRY_CREATED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">This event is triggered when Ignite creates an internal entry for working with a specific object from a cache. We don’t recommend using this event. If you want to monitor cache put operations, the <code>EVT_CACHE_OBJECT_PUT</code> event should be enough for most cases.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary and backup nodes for the entry.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_ENTRY_DESTROYED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">This event is triggered when Ignite destroys an internal entry that was created for working with a specific object from a cache. |
| We don’t recommend using it. |
| Destroying the internal entry does not remove any data from the cache. |
| If you want to monitor cache remove operations, use the <code>EVT_CACHE_OBJECT_REMOVED</code> event.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary and backup nodes for the entry.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="cache-query-events">Cache Query Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>There are two types of events that are related to cache queries:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Cache query object read events, which are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/CacheQueryReadEvent.html" target="_blank" rel="noopener">CacheQueryReadEvent</a> class.</p> |
| </li> |
| <li> |
| <p>Cache query executed events, which are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/CacheQueryExecutedEvent.html" target="_blank" rel="noopener">CacheQueryExecutedEvent</a> class.</p> |
| </li> |
| </ul> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_QUERY_OBJECT_READ</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">An object is read as part of a query execution. This event is generated for every object that matches the <a href="/docs/2.11.1/key-value-api/using-scan-queries#executing-scan-queries">query filter</a>.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The primary node of the object that is read.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_QUERY_EXECUTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">This event is generated when a query is executed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All server nodes that host the cache.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="class-and-task-deployment-events">Class and Task Deployment Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Deployment events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/DeploymentEvent.html">DeploymentEvent</a> class.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLASS_DEPLOYED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A class (non-task) is deployed on a specific node.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the class is deployed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLASS_UNDEPLOYED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A class is undeployed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the class is undeployed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLASS_DEPLOY_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Class deployment failed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the class is to be deployed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_DEPLOYED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A task class is deployed on a specific node.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the class is deployed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_UNDEPLOYED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A task class is undeployed on a specific node.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the class is undeployed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_DEPLOY_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Class deployment failed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the class is to be deployed.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="discovery-events">Discovery Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Discovery events occur when nodes (both servers and clients) join or leave the cluster, including cases when nodes leave due to a failure.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Discovery events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/DiscoveryEvent.html">DiscoveryEvent</a> class.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_NODE_JOINED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A node joins the cluster.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All nodes in the cluster (other than the one that joined).</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_NODE_LEFT</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A node leaves the cluster.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All remaining nodes in the cluster.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_NODE_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The cluster detects that a node left the cluster in a non-graceful way.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All remaining nodes in the cluster.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_NODE_SEGMENTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">This happens on a node that decides that it was segmented.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node that is segmented.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLIENT_NODE_DISCONNECTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A client node loses connection to the cluster.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The client node that disconnected from the cluster.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLIENT_NODE_RECONNECTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A client node reconnects to the cluster.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The client node that reconnected to the cluster.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="task-execution-events">Task Execution Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Task execution events are associated with different stages of <a href="/docs/2.11.1/distributed-computing/map-reduce">task execution</a>. |
| They are also generated when you execute <a href="/docs/2.11.1/distributed-computing/distributed-computing">simple closures</a> because internally a closure is treated as a task that produces a single job.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Task Execution events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/TaskEvent.html">TaskEvent</a> class.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_STARTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A task is started. <code>IgniteCompute.execute()</code> or other method is called</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node that initiates the task.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_REDUCED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">This event represents the 'reduce' stage of the task execution flow.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the task was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_FINISHED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The execution of the task finishes.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the task was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The task failed</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the task was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_TIMEDOUT</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The execution of the task timed out. This can happen when <code>Ignite.compute().withTimeout(…​)</code> to execute tasks. When a task times out, it cancels all jobs that are being executed. It also generates the <code>EVT_TASK_FAILED</code> event.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the task was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TASK_SESSION_ATTR_SET</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A job sets an attribute in the <a href="/docs/2.11.1/distributed-computing/map-reduce#distributed-task-session">session</a>.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is executed.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <div class="paragraph"> |
| <p><br></p> |
| </div> |
| <div class="paragraph"> |
| <p>Job Execution events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/JobEvent.html">JobEvent</a> class. |
| The job execution events are generated at different stages of job execution and are associated with particular instances of the job. |
| The event contains information about the task that produced the job (task name, task class, etc.).</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_MAPPED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A job is mapped to a specific node. Mapping happens on the node where the task is started. This event is generated for every job produced in the "map" stage.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node that started the task.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_QUEUED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The job is added to the queue on the node to which it was mapped.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is scheduled for execution.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_STARTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Execution of the job started.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is executed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_FINISHED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Execution of the job finished. This also includes cases when the job is cancelled.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is executed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_RESULTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The job returned a result to the node from which it was sent.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the task was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Execution of a job fails. If the job failover strategy is configured (default), this event is accompanied by the <code>EVT_JOB_FAILED_OVER</code> event.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is executed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_FAILED_OVER</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The job was failed over to another node.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node that started the task.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_TIMEDOUT</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The job timed out.</p></td> |
| <td class="tableblock halign-left valign-top"></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_REJECTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The job is rejected. The job can be rejected if a <a href="/docs/2.11.1/distributed-computing/job-scheduling">collision spi</a> is configured.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is rejected.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_JOB_CANCELLED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The job was cancelled.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the job is being executed.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="cache-rebalancing-events">Cache Rebalancing Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Cache Rebalancing events (all except for <code>EVT_CACHE_REBALANCE_OBJECT_LOADED</code> and <code>EVT_CACHE_REBALANCE_OBJECT_UNLOADED</code>) are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/CacheRebalancingEvent.html">CacheRebalancingEvent</a> class.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Rebalancing occurs on a per cache basis; therefore, each rebalancing event corresponds to a specific cache. |
| The event contains the name of the cache.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The process of moving a single cache partition from Node A to Node B consists of the following steps:</p> |
| </div> |
| <div class="olist arabic"> |
| <ol class="arabic"> |
| <li> |
| <p>Node A supplies a partition (REBALANCE_PART_SUPPLIED). The objects from the partition start to move to node B.</p> |
| </li> |
| <li> |
| <p>Node B receives the partition data (REBALANCE_PART_LOADED).</p> |
| </li> |
| <li> |
| <p>Node A removes the partition from its storage (REBALANCE_PART_UNLOADED).</p> |
| </li> |
| </ol> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_STARTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The rebalancing of a cache starts.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All nodes that host the cache.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_STOPPED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The rebalancing of a cache stops.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">All nodes that host the cache.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_PART_LOADED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A cache’s partition is loaded on the new node. This event is fired for every partition that participates in the cache rebalancing.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the partition is loaded.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_PART_UNLOADED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A cache’s partition is removed from the node after it has been loaded to its new destination.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the partition was held before the rebalancing process started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_OBJECT_LOADED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">An object is moved to a new node as part of cache rebalancing.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the object is loaded.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_OBJECT_UNLOADED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">An object is removed from a node after it has been moved to a new node.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node from which the object is removed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_PART_DATA_LOST</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A partition that is to be rebalanced is lost, for example, due to a node failure.</p></td> |
| <td class="tableblock halign-left valign-top"></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CACHE_REBALANCE_PART_SUPPLIED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A node supplies a cache partition as part of the rebalancing process.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node that owns the partition.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="transaction-events">Transaction Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Transaction events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/TransactionStateChangedEvent.html">TransactionStateChangedEvent</a> class. |
| They allow you to get notification about different stages of transaction execution. Each event contains the <code>Transaction</code> object this event is associated with.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TX_STARTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A transaction is started. Note that in transactional caches, each atomic operation executed outside a transaction is considered a transaction with a single operation.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the transaction was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TX_COMMITTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A transaction is committed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the transaction was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TX_ROLLED_BACK</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A transaction is rolled back.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the transaction was executed.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TX_SUSPENDED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A transaction is suspended.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the transaction was started.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_TX_RESUMED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A transaction is resumed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the transaction was started.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="snapshot-events">Snapshot Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>All snapshot events are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/SnapshotEvent.html">SnapshotEvent</a> class. The snapshot events |
| are always triggered at the node initiated a snapshot operation. They are also associated with the particular snapshot operation name. |
| These events can notify you about the states and the result of the cluster snapshot operation, which can be used for further processing in |
| your custom procedures.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLUSTER_SNAPSHOT_STARTED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A cluster snapshot operation is started.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the snapshot operation was initiated.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLUSTER_SNAPSHOT_FINISHED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A cluster snapshot operation is finished. The event is fired when the snapshot operation is finished on all the cluster nodes.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the snapshot operation was finished.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_CLUSTER_SNAPSHOT_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">A cluster snapshot operation is failed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The node where the snapshot operation was initiated. Note that the message will contain a failure description from another node. You may check the logs for details.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="node-validation-failure-events">Node Validation Failure Events</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>These events are triggered when a new node cannot join the Ignite cluster because some of the cluster member nodes failed to validate it. |
| Validation should be understood as the configuration and state compatibility check between the joining node and the cluster member nodes. |
| Node validation failure events provide information about the node that tried to join the cluster and the reason for the validation failure.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Events related to node validation failures are instances of the <a href="https://ignite.apache.org/releases/2.11.1/javadoc/org/apache/ignite/events/NodeValidationFailedEvent.html">NodeValidationFailedEvent</a> class.</p> |
| </div> |
| <table class="tableblock frame-all grid-all stripes-even stretch"> |
| <colgroup> |
| <col style="width: 20%;"> |
| <col style="width: 50%;"> |
| <col style="width: 30%;"> |
| </colgroup> |
| <thead> |
| <tr> |
| <th class="tableblock halign-left valign-top">Event Type</th> |
| <th class="tableblock halign-left valign-top">Event Description</th> |
| <th class="tableblock halign-left valign-top">Where Event Is Fired</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">EVT_NODE_VALIDATION_FAILED</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Node validation failed.</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">The cluster member node that failed to validate new node that tried to join the cluster.</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="copyright"> |
| © 2022 The Apache Software Foundation.<br/> |
| Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation. |
| |
| </div> |
| |
| </article> |
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