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From "Carsten Erker (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CAMEL-8500) ClassCastException when something other than PropertiesComponent is bound to "properties" JNDI name
Date Tue, 17 Mar 2015 11:09:38 GMT
Carsten Erker created CAMEL-8500:
------------------------------------

             Summary: ClassCastException when something other than PropertiesComponent is
bound to "properties" JNDI name
                 Key: CAMEL-8500
                 URL: https://issues.apache.org/jira/browse/CAMEL-8500
             Project: Camel
          Issue Type: Bug
          Components: camel-core
    Affects Versions: 2.13.4
         Environment: Apache Camel 2.13.4 running on JBoss EAP4
            Reporter: Carsten Erker


*Problem:*
When starting the DefaultCamelContext, Camel tries to get a PropertiesComponent object from
JNDI under the name "properties" (which is hard-coded in DefaultCamelContextlookupPropertiesComponent()
resp. CamelContextHelperlookupPropertiesComponent() in newer Camel versions).

During start we get the following Error:
{code}
org.apache.camel.NoSuchBeanException: Found bean: properties in JNDI Context: javax.naming.InitialContext@a37a18
of type: org.jnp.interfaces.NamingContext expected type was: class org.apache.camel.component.properties.PropertiesComponent
	at org.apache.camel.impl.JndiRegistry.lookupByNameAndType(JndiRegistry.java:61)
	at org.apache.camel.impl.PropertyPlaceholderDelegateRegistry.lookupByNameAndType(PropertyPlaceholderDelegateRegistry.java:63)
	at org.apache.camel.impl.DefaultCamelContext.lookupPropertiesComponent(DefaultCamelContext.java:2788)
	at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:1834)
	at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:1716)
	at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61)
	at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:1684)
	at de.bwb.ubi.vs.automat.mbean.CamelStarter.startService(CamelStarter.java:21)
	at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
[...]
Caused by: java.lang.ClassCastException
	at java.lang.Class.cast(Class.java:2999)
	at org.apache.camel.impl.JndiRegistry.lookupByNameAndType(JndiRegistry.java:57)
	... 145 more
{code}

*Reason:*
Our application bind some properties to the name "properties/..." in the JNDI global namespace.

*Proposed Solution*
Camel can manage if it finds nothing under the JNDI name, the problem is just finding something
different than the expected PropertiesComponent instance. Instead of calling JndiRegistry.lookupByNameAndType(String,
Class) -- this is where the cast fails -- we should call JndiRegistry.lookupByName(String
name). If an instance other than a PropertiesComponent is returned here, we should go on as
if nothing was found in the JNDI lookup.

I can provide a pull request for this.



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