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EJB 3.1 Timer problems in scheduling recurring task
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created by <a href="http://community.jboss.org/people/andrea-b">Andrea Bennati</a> in <i>EJB3</i> - <a href="http://community.jboss.org/message/579029#579029">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm trying to use an EJB 3.1 Timer to schedule a recurring task every 5 minutes.</p><p>I'm using JBOSS 6.0.0.Final.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>This is the simple code I have deployed:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">import javax.ejb.Schedule;</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">import javax.ejb.Stateless;</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">import javax.ejb.Timeout;</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"> </div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">/**</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"> * Session Bean implementation class AlerMonitorBean</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"> */</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">@Stateless</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">public class AlerMonitorBean {</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"> </div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    /**</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">     * Default constructor. </div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">     */</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    public AlerMonitorBean() {</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">        // TODO Auto-generated constructor stub</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    }</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    </div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    @Schedule(minute="0/5")</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    public void GestisciAlert() {</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">         System.out.println("Gestisti Alert - Tick"+System.currentTimeMillis());</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    }</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    </div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    @Timeout</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">    public void GestisciTimeout(){</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;">         System.out.println("Timeout");</div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p> }</p></div><div id="_mcePaste" style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;"><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></div><p>import javax.ejb.Schedule;</p><p>import javax.ejb.Stateless;</p><p>import javax.ejb.Timeout;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>/**</p><p> * Session Bean implementation class AlerMonitorBean</p><p> */</p><p>@Stateless</p><p>public class AlerMonitorBean {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    /**</p><p>     * Default constructor. </p><p>     */</p><p>    public AlerMonitorBean() {</p><p>        // TODO Auto-generated constructor stub</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Schedule(minute="*/5")</p><p>    public void GestisciAlert() {</p><p>    <span style="white-space:pre"> </span>System.out.println("Gestisti Alert - Tick -> "+System.currentTimeMillis());</p><p>        //TODO: insert code</p><p>    }    </p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I notice the following in Jboss Console:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><p>15:40:00,006 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238400006</p><p>15:40:00,010 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238400010</p><p>15:40:01,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238401004</p><p>15:40:02,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238402004</p><p>15:40:03,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238403004</p><p>15:40:04,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238404004</p><p>15:40:05,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238405004</p><p>15:40:06,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238406004</p><p>15:40:07,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238407004</p><p>15:40:08,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238408003</p><p>15:40:09,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238409004</p><p>15:40:10,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238410003</p><p>15:40:11,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238411004</p><p>15:40:12,006 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238412006</p><p>15:40:13,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238413004</p><p>15:40:14,008 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238414008</p><p>15:40:15,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238415004</p><p>15:40:16,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238416004</p><p>15:40:17,008 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238417008</p><p>15:40:18,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238418004</p><p>15:40:19,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238419003</p><p>15:40:20,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238420004</p><p>15:40:21,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238421003</p><p>15:40:22,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238422004</p><p>15:40:23,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238423003</p><p>15:40:24,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238424004</p><p>15:40:25,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238425003</p><p>15:40:26,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238426004</p><p>15:40:27,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238427003</p><p>15:40:28,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238428004</p><p>15:40:29,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238429004</p><p>15:40:30,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238430004</p><p>15:40:31,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238431004</p><p>15:40:32,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238432004</p><p>15:40:33,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238433004</p><p>15:40:34,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238434004</p><p>15:40:35,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238435004</p><p>15:40:36,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238436004</p><p>15:40:37,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238437004</p><p>15:40:38,005 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238438005</p><p>15:40:39,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238439004</p><p>15:40:40,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238440003</p><p>15:40:41,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238441004</p><p>15:40:42,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238442004</p><p>15:40:43,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238443004</p><p>15:40:44,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238444004</p><p>15:40:45,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238445004</p><p>15:40:46,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238446004</p><p>15:40:47,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238447004</p><p>15:40:48,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238448004</p><p>15:40:49,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238449004</p><p>15:40:50,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238450003</p><p>15:40:51,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238451003</p><p>15:40:52,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238452004</p><p>15:40:53,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238453004</p><p>15:40:54,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238454003</p><p>15:40:55,008 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238455008</p><p>15:40:56,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238456004</p><p>15:40:57,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238457003</p><p>15:40:58,004 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238458004</p><p>15:40:59,003 INFO  [STDOUT] Gestisti Alert - Tick -> 1294238459003</p></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I expected that method "GestisciAlert" was called <span style="text-decoration: underline;">once</span> every 5 minutes.....</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Every 5 minutes Timer starts and activates target method several times (about once per second) for a minute....</p><p>Then it stops and starts again after 4 minutes.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Hope someone can help me.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Andrea</p></div>
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