Newbie - two JMX spring app. in one web container

[kranjcec]

Hi

I'm have problem with running two web apps in one app. server. Both use spring for exporting spring beans on mbean server.
When I run only one app. everything is OK.

This is (example) applicationContext.xml for first app:

<?xml version="1.0"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
  <!-- Creates the mbeanServer -->
  <bean id="mbeanServer" 
      class="org.springframework.jmx.support.MBeanServerFactoryBean">
    <property name="locateExistingServerIfPossible" value="true" />
  </bean>
  <!-- RMI registry -->
  <bean id="rmiRegistryFactoryBean" 
      class="org.springframework.remoting.rmi.RmiRegistryFactoryBean">
  </bean>
  <bean id="serviceUrl" class="java.lang.String">
    <constructor-arg type="java.lang.String">
      <value>service:jmx:rmi://localhost/jndi/rmi://localhost:1099/jmxrmi</value>
    </constructor-arg>
  </bean>  
  <bean id="jmxServiceURL"
    class="javax.management.remote.JMXServiceURL">
    <constructor-arg>
      <ref local="serviceUrl"/>
    </constructor-arg>
  </bean>
  <bean id="jmxConnectorServer" 
      class="org.springframework.jmx.support.ConnectorServerFactoryBean"
      depends-on="mbeanServer">     
      <property name="serviceUrl">
        <ref local="serviceUrl"/>
      </property>
      <property name="server">
        <ref local="mbeanServer"/>
      </property>
      <property name="environmentMap">
      <map>
        <entry
          key="JMXConnectorServerFactory.PROTOCOL_PROVIDER_PACKAGES">
          <value>MX4JRemoteConstants.PROVIDER_PACKAGES</value>
        </entry>
      </map>      
      </property>
  </bean>
  <!-- exports the beans with the assembler -->
  <bean id="jmxAdapter"
    class="org.springframework.jmx.export.MBeanExporter">
    <property name="beans">
      <map>
        <entry key="appOne:name=TestAppOne">
          <ref local="TestAppOne" />
        </entry>        
      </map>
    </property>
    <property name="server">
      <ref local="mbeanServer" />
    </property>
  </bean>
  <bean id="TestAppOne" class="TestAppOne"/>

</beans>

applicationContext.xml for second app is similar:

...
  <!-- exports the beans with the assembler -->
  <bean id="jmxAdapter"
    class="org.springframework.jmx.export.MBeanExporter">
    <property name="beans">
      <map>
        <entry key="appTwo:name=TestAppTwo">
          <ref local="TestAppTwo" />
        </entry>        
      </map>
    </property>
    <property name="server">
      <ref local="mbeanServer" />
    </property>
  </bean>
  <bean id="TestAppTwo" class="TestAppTwo"/>
...

When app. server is started (Orion) first app is started OK (with JMX mbeans exported), but second app throws this excpetion:

Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean wit
h name 'jmxConnectorServer' defined in ServletContext resource [/WEB-INF/applica
tionContext.xml]: Error setting property values; nested exception is org.springf
ramework.beans.PropertyAccessExceptionsException: PropertyAccessExceptionsExcept
ion (1 errors); nested propertyAccessExceptions are: [org.springframework.beans.
TypeMismatchException: Failed to convert property value of type [org.springframe
work.jmx.support.MBeanServerFactoryBean] to required type [javax.management.MBea
nServer] for property 'server']
PropertyAccessExceptionsException (1 errors)
org.springframework.beans.TypeMismatchException: Failed to convert property valu
e of type [org.springframework.jmx.support.MBeanServerFactoryBean] to required t
ype [javax.management.MBeanServer] for property 'server'
        at org.springframework.beans.BeanWrapperImpl.doTypeConversionIfNecessary
(BeanWrapperImpl.java:1103)
        at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrappe
rImpl.java:848)
        at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrappe
rImpl.java:733)
        at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrappe
rImpl.java:890)
        at org.springframework.beans.BeanWrapperImpl.setPropertyValues(BeanWrapp
erImpl.java:917)
        at org.springframework.beans.BeanWrapperImpl.setPropertyValues(BeanWrapp
erImpl.java:906)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1022)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.populateBean(AbstractAutowireCapableBeanFactory.java:823)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBean
Factory.createBean(AbstractAutowireCapableBeanFactory.java:345)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean
(AbstractBeanFactory.java:226)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean
(AbstractBeanFactory.java:147)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.
preInstantiateSingletons(DefaultListableBeanFactory.java:275)
        at org.springframework.context.support.AbstractApplicationContext.refres
h(AbstractApplicationContext.java:318)
        at org.springframework.web.context.support.AbstractRefreshableWebApplica
tionContext.refresh(AbstractRefreshableWebApplicationContext.java:134)
        at org.springframework.web.context.ContextLoader.createWebApplicationCon
text(ContextLoader.java:230)
        at org.springframework.web.context.ContextLoader.initWebApplicationConte
xt(ContextLoader.java:156)
        at org.springframework.web.context.ContextLoaderListener.contextInitiali
zed(ContextLoaderListener.java:48)
        at com.evermind._ay._lee(.:552)
        at com.evermind._ay.<init>(.:317)
        at com.evermind._am._rtb(.:607)
        at com.evermind._ex._rtb(.:581)
        at com.evermind._eu._kae(.:482)
        at com.evermind._eu._bi(.:226)
        at com.evermind._ex._bn(.:240)
        at com.evermind._ex._bi(.:146)
        at com.evermind.server.ApplicationServer._gke(.:1730)
        at com.evermind.server.ApplicationServer._bi(.:1068)
        at com.evermind._ctb.run(.:89)
        at java.lang.Thread.run(Thread.java:595)
        at com.evermind._bf.run(.:47)

I don't understand why is MBeanServerFactoryBean referenced instead od MBeanServer.
If I deploy only second app. everything runs fine.

Any ideas?

Thanks in advance.

Regards,
Denis

[kranjcec]

I found workaround for this problem. When spring.jar, commons-logging.jar and mx4j*.jar was in EAR of every application, I got errors from previous post, but when jars are in Orion's classpath everything forks fine.

This is good enough for me right now, but I don't understand why spring.jar must be in app. server classpath.

I tried spring 1.2.6 and 1.2.8, and orion 2.0.2 and 2.0.7.

Denis

[Costin Leau]

classpath problems - some lib from the EAR will load some lib from the server classloader which will try to load some lib from your EAR again but since its not visible it will blow up.