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Trying to connect to an JBoss 4.2.1.GA org.jboss.system.server.ServerInfo with groovy without success results in "error during JRMP connection establishment"
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created by <a href="http://community.jboss.org/people/cptblaubaer">Andreas Oswald</a> in <i>JMX Development</i> - <a href="http://community.jboss.org/message/609267#609267">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi there,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>to monitor FreeMemory in org.jboss.system.server.ServerInfo on a regular basis I would like to connect to 4.2.1.GA with the help of a groovy script and execute some actions in the groovy script if the FreeMemory goes under a critical value. Also I would like to log the FreeMemory over the time, which could be done in the groovy script as well.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When using the jmx console with the browser I can show the wanted value as can be done with executing twiddle.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><blockquote class="jive-quote"><span class="jive-quote-header">Accessing from twiddle works fine</span><br/><br/><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>C:\Programme\jboss-4.2.1.GA\bin&gt;twiddle -s vm-appsfs4p:1099 get "jboss.system:type=ServerInfo" FreeMemory</p><p>FreeMemory=320676872</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I tried quite a few code snippets from the internet and tried different permutation of URL syntax</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code">
import java.lang.management.*
import javax.management.ObjectName
import javax.management.remote.JMXConnectorFactory as JmxFactory
import javax.management.remote.JMXServiceURL as JmxUrl
def serverUrl = "service:jmx:rmi:///jndi/rmi://vm-appsfs4p:1099/jmxrmi"
String beanName = "jboss.system:type=ServerInfo"
def server = JmxFactory.connect(new JmxUrl(serverUrl)).MBeanServerConnection
def mbean = new GroovyMBean(server, beanName)
println "Connected to:\n$dataSystem\n"
println mbean.FreeMemory;
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><blockquote class="jive-quote"><span class="jive-quote-header">Here's what my output looks like</span><br/><br/><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>C:\temp&gt;jmx.groovy</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Caught: java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException</p><p>[Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:</p><p>        java.net.SocketException: Software caused connection abort: recv failed]</p><p>        at jmx.run(jmx.groovy:9)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What am I doing wrong? Please be kind as those are my first experiments in this area.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'd be happy if someone could help me with this, thanks in advance for your help</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Take care</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Andreas</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p></div>
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