JNDI lookup couldn't find any objects in MBean class and -userThreads issue

Question

Hi,
We had used some MBean classes in a jboss j2ee project. Now we need to migrate it to oc4j. We also need to use Thread class and jndi looking up in these MBean classes.
I encountered two problems when I migrate these MBeans.
1. The first problem is:
If I create a InitialContext object just like the following:
InitialContext result = new InitialContext();
Then I lookup an ejb,I can't find anything from this InitialContext.
However,If I create a InitialContext object just like below:
Properties props = new Properties();
props.put( Context.PROVIDER_URL, "***" );
props.put( Context.INITIAL_CONTEXT_FACTORY, "***");
//props.put( Context.URL_PKG_PREFIXES, "***" );
props.put( Context.SECURITY_PRINCIPAL, "***");
props.put( Context.SECURITY_CREDENTIALS, "***" );
InitialContext result = new InitialContext(props);
I can find that ejb. Why?
Is it possible to get InitialContext just like InitialContext result = new InitialContext()?
2. The second problem is:
I had used a thread class to do the above mentioned jndi looking up in one MBean method. This method is not be invoked by oc4j EM. It is invoked by another class. There is an exception throws just like below:
javax.naming.NamingException: Not in an application scope - start OC4J with the -userThreads switch if using user-created threads
I had add -userThreads argument in the startup command just like below:
java -Xdebug -Xnoagent -Djava.compiler=NONE -Doc4j.jmx.security.proxy.off=true -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=4000 -Dnl=en_US %JAVA_OPTS% %JAVA_SYSPROP% -jar %ORACLE_HOME%/j2ee/home/oc4j.jar
-userThreads
Does anyone know why there is an jndi problem in MBean class?
Thanks,
Eternal

Answer 1

Hi,
We had used some MBean classes in a jboss j2ee project. Now we need to migrate it to oc4j. We also need to use Thread class and jndi looking up in these MBean classes.
I encountered two problems when I migrate these MBeans.
1. The first problem is:
If I create a InitialContext object just like the following:
InitialContext result = new InitialContext();
Then I lookup an ejb,I can't find anything from this InitialContext.
However,If I create a InitialContext object just like below:
Properties props = new Properties();
props.put( Context.PROVIDER_URL, "***" );
props.put( Context.INITIAL_CONTEXT_FACTORY, "***");
//props.put( Context.URL_PKG_PREFIXES, "***" );
props.put( Context.SECURITY_PRINCIPAL, "***");
props.put( Context.SECURITY_CREDENTIALS, "***" );
InitialContext result = new InitialContext(props);
I can find that ejb. Why?
Is it possible to get InitialContext just like InitialContext result = new InitialContext()?
2. The second problem is:
I had used a thread class to do the above mentioned jndi looking up in one MBean method. This method is not be invoked by oc4j EM. It is invoked by another class. There is an exception throws just like below:
javax.naming.NamingException: Not in an application scope - start OC4J with the -userThreads switch if using user-created threads
I had add -userThreads argument in the startup command just like below:
java -Xdebug -Xnoagent -Djava.compiler=NONE -Doc4j.jmx.security.proxy.off=true -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=4000 -Dnl=en_US %JAVA_OPTS% %JAVA_SYSPROP% -jar %ORACLE_HOME%/j2ee/home/oc4j.jar
-userThreads
Does anyone know why there is an jndi problem in MBean class?
Thanks,
Eternal