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Stateless Pooling In JBoss AS.
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created by <a href="http://community.jboss.org/people/grdzeli_kaci">paata lominadze</a> in <i>EJB 3.0</i> - <a href="http://community.jboss.org/message/535357#535357">View the full discussion</a>
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<div class="jive-rendered-content"><p>hi all,</p><p>I have strange problem.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>My Env:</p><p>1. OS                         Sun Solaris Sparc</p><p>2.Application Server   jboss-4.2.3.GA</p><p>3.java                        Oracle JRockit(R) version "1.6.0_05"</p><p><span>4.Ext. Lib.                   Apache http Client (</span><a class="jive-link-external-small" href="http://hc.apache.org/httpclient-3.x/" target="_blank">http://hc.apache.org/httpclient-3.x/</a><span>)</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have one stateless session bean which sends SMS Message to mobile using http client.</p><p>my session bean looks like :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>@Stateless<br/>@Remote(CommonFasade.class)<br/>public class CommonFasadeBean implements CommonFasade {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    private HttpClient httpClient = null;</p><p>    public HttpClient getHttpClient() {<br/>        if (httpClient == null) {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            SimpleHttpConnectionManager manager = new SimpleHttpConnectionManager();<br/>            manager.getParams().setConnectionTimeout(5000);<br/>            manager.getParams().setSoTimeout(5000);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            httpClient = new HttpClient(manager);<br/>        }<br/>        return httpClient;<br/>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    public void sendSMS(String fullSms, String phone, String from) {<br/>        HttpClient httpClient = getHttpClient();<br/>        phone = Utils.trimPhone(phone);<br/>        phone = getPhone(phone);<br/>        if (phone == null) {<br/>            return;<br/>        }<br/>        String sendToPhone = null;<br/>        switch (phone.length()) {<br/>        case 8:<br/>            sendToPhone = "%s2B995" + phone;<br/>            break;<br/>        case 9:<br/>            sendToPhone = "%s2B995" + phone.substring(1);<br/>            break;<br/>        default:<br/>            return;<br/>        }<br/><span>        String url = "</span><a class="jive-link-external-small" href="http://192.168.19.194:13013/cgi-bin/sendsms?from=" target="_blank">http://192.168.19.194:13013/cgi-bin/sendsms?from=</a><span>" + from</span><br/>                + "&username=1&password=1&to=" + sendToPhone + "&text=%s";<br/>        long sc = -999;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        try {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>            for (String sms : prepareSmsList(fullSms)) {<br/>                GetMethod method = new GetMethod(String.format(url, "%", sms));<br/>                try {<br/>                    sc = httpClient.executeMethod(method);<br/>                    if (sc == HttpStatus.SC_ACCEPTED) {<br/>                        String response = method.getResponseBodyAsString();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>                        if (response.toLowerCase().indexOf("sent") != -1) {<br/>                            logSMS(sms, phone, from);<br/>                        }<br/>                    }<br/>                } finally {<br/>                    method.releaseConnection();<br/>                }<br/>            }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        } catch (Exception e) {<br/>            e.printStackTrace();<br/>        }<br/>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>this code worked for tree years, but problem appeard some days ago.</p><p>every second or third day my jboss application server crashes.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>when i trying to find promlem i found this :</p><p>1. into solaris :</p><p>"netstat -an|grep 192.168.19.194|wc -l  (this is SMS sender HTTP server)"</p><p>     and result was : 12678</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>this is client socket connections from my jboss as, all of them is on a CLOSE_WAIT state.</p><p>After this when i looking into the jmx-console i found this :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a href="http://community.jboss.org/servlet/JiveServlet/showImage/2469/MBeanView.jpeg"><span> http://community.jboss.org/servlet/JiveServlet/downloadImage/2469/450-264/MBeanView.jpeg </span></a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>My question is why i have 12826 stateless session bean isntances into as ?</p><p>Into my jboss as stateless session pool config max size is 30.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>i think that something changed into  HTTP Server or into network.</p><p>but i need workarount of this porblem .</p><p>is this pattern right for using http clients ? Maybe it will be more correct to use MDB for this ?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>when current size of my stateless session bean achieve 40000 the jboss as going down.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>can anybody help me what should i do ???</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>___________________</p><p>Regards,</p><p>Paata Lominadze.</p></div>
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