Re: NullPointerException - Lookup Connection Factory

I've no experience running OpenJMS under GCJ, but the exception appears 
to be coming from the
GCJ RMI implementation. You could work around this by using the TCP 
connector instead.

-Tim


ShashiKiran Kerur wrote:
>
> Hello,
> I have installed Openjms in Linux and trying to look up connection 
> factory.
>
> Installed OPENJMS on Linux
>
> OpenJMS - openjms-0.7.7-alpha-2
> Linux - (Red Hat Enterprise Linux AS release 4 (Nahant Update 1)
>
>
> openjms.xml
>
> <ServerConfiguration host="host ip" embeddedJNDI="true" />
>
>   <Connectors>
>     <Connector scheme="tcp">
>       <ConnectionFactories>
>         <ConnectionFactory name="ConnectionFactory" />
>       </ConnectionFactories>
>     </Connector>
>     <Connector scheme="rmi">
>       <ConnectionFactories>
>         <QueueConnectionFactory name="JmsQueueConnectionFactory" />
>         <TopicConnectionFactory name="JmsTopicConnectionFactory" />
>       </ConnectionFactories>
>     </Connector>
>   </Connectors>
>
>
> Client code to look up Connection Factory
> import java.util.Hashtable;
> import javax.naming.Context;
> import javax.naming.InitialContext;
> import javax.jms.QueueConnectionFactory;
> import javax.jms.ConnectionFactory;
>
>         Context context = null;
>         Hashtable properties = new Hashtable();
>         properties.put(Context.INITIAL_CONTEXT_FACTORY, 
> "org.exolab.jms.jndi.InitialContextFactory");
>         properties.put(Context.PROVIDER_URL, "rmi://host ip:1099/");
>        
>         Context ctx = getInitialContext();
>         System.out.println("********** Context:"+ctx);
>
>         QueueConnectionFactory queueConn = 
> (QueueConnectionFactory)ctx.lookup("JmsQueueConnectionFactory");
>
>
> Look up failes with the following error:
>
>
> ********** Context:javax.naming.InitialContext@ded50
> Error:java.lang.NullPointerException
> java.lang.NullPointerException
>   at java.rmi.server.UnicastRemoteObject.exportObject(java.rmi.Remote) 
> (/usr/lib/libgcj.so.5.0.0)
>   at 
> org.exolab.jms.net.rmi.RMIManagedConnection.RMIManagedConnection(java.security.Principal, 
> org.exolab.jms.net.rmi.RMIRequestInfo) (Unknown Source)
>   at 
> org.exolab.jms.net.rmi.RMIManagedConnectionFactory.createManagedConnection(java.security.Principal, 
> org.exolab.jms.net.connector.ConnectionRequestInfo) (Unknown Source)
>   at 
> org.exolab.jms.net.connector.DefaultConnectionPool.createManagedConnection(java.security.Principal, 
> org.exolab.jms.net.connector.ConnectionRequestInfo) (Unknown Source)
>   at 
> org.exolab.jms.net.connector.AbstractConnectionManager.allocateConnection(org.exolab.jms.net.connector.ManagedConnectionFactory, 
> java.security.Principal, 
> org.exolab.jms.net.connector.ConnectionRequestInfo) (Unknown Source)
>   at 
> org.exolab.jms.net.connector.AbstractConnectionFactory.getConnection(java.security.Principal, 
> org.exolab.jms.net.uri.URI, java.util.Map) (Unknown Source)
>   at 
> org.exolab.jms.net.connector.AbstractConnectionManager.getConnection(java.security.Principal, 
> org.exolab.jms.net.uri.URI, java.util.Map) (Unknown Source)
>   at org.exolab.jms.net.orb.Locator.getProxy(java.rmi.server.ObjID, 
> java.security.Principal, java.lang.String, 
> org.exolab.jms.net.connector.ConnectionFactory, java.lang.String, 
> java.lang.ClassLoader, java.util.Map) (Unknown Source)
>   at 
> org.exolab.jms.net.orb.Locator.getRegistry(java.security.Principal, 
> java.lang.String, org.exolab.jms.net.connector.ConnectionFactory, 
> java.lang.ClassLoader, java.util.Map) (Unknown Source)
>   at org.exolab.jms.net.orb.DefaultORB.getRegistry(java.util.Map) 
> (Unknown Source)
>   at org.exolab.jms.client.net.SharedORB.getRegistry(java.util.Map) 
> (Unknown Source)
>   at 
> org.exolab.jms.jndi.InitialContextFactory.getInitialContext(java.util.Hashtable) 
> (Unknown Source)
>   at 
> javax.naming.spi.NamingManager.getInitialContext(java.util.Hashtable) 
> (/usr/lib/libgcj.so.5.0.0)
>   at javax.naming.InitialContext.getDefaultInitCtx() 
> (/usr/lib/libgcj.so.5.0.0)
>   at 
> javax.naming.InitialContext.getURLOrDefaultInitCtx(java.lang.String) 
> (/usr/lib/libgcj.so.5.0.0)
>   at javax.naming.InitialContext.lookup(java.lang.String) 
> (/usr/lib/libgcj.so.5.0.0)
>   at TestOpenJMS.testConnection() (Unknown Source)
>   at TestOpenJMS.main(java.lang.String[]) (Unknown Source)
>
>
>
> How do i resolve the same
>
>
> Thanks
> Shashi 
>


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