Issues with CORBA communication

Question

This maybe too localized, but I am hoping someone can help me articulate my questions properly.

So, we have a front end web server that communicates with a back end app server using CORBA. I have been asked to port the back end application to a LINUX box, which I did. But, in order to test it, I am trying to point the front end web server to the LINUX back end.

We are using omniORB-4.1.4, and here is how the instance of the back end system is obtained:

        String args[] = new String[0];
        System.out.println(getDateTime()+"Instance: Connecting to: "+initialHost+"  "+initialPort+"  "+enviornment+"  "+version);
        java.util.Properties props = new java.util.Properties();
        props.put("org.omg.CORBA.ORBInitialPort", initialPort);
        props.put("org.omg.CORBA.ORBInitialHost", initialHost);
        props.put("com.sun.CORBA.giop.ORBGIOPVersion", "1.0");
        orb=org.omg.CORBA.ORB.init(args,props);

When both and front end and back end are running on a SUN/Solaris box, it seems to get an instance fine. But, when the back end is running on a LINUX box, it gives a Connection Refused exception, and the hostname as 127.0.0.1

  2012/10/22 13:53:22.033   EvaluateInstance: Connecting to: cmrheldv  23026  DEV87  0871
   Oct 22, 2012 1:53:22 PM com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl <init>
  WARNING: "IOP00410201: (COMM_FAILURE) Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: cmrheldv; port: 23026"
 org.omg.CORBA.COMM_FAILURE:   vmcid: SUN  minor code: 201  completed: No
    at      com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(ORBUtilSystemException.java:2200)
    at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(ORBUtilSystemException.java:2221)
    at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:205)
    at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:218)
    at com.sun.corba.se.impl.transport.SocketOrChannelContactInfoImpl.createConnection(SocketOrChannelContactInfoImpl.java:101)
    at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:171)
    at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.request(CorbaClientDelegateImpl.java:118)
    at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.invoke(BootstrapResolverImpl.java:74)
    at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.resolve(BootstrapResolverImpl.java:107)
    at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(CompositeResolverImpl.java:22)
    at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(CompositeResolverImpl.java:22)
    at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(CompositeResolverImpl.java:22)
    at com.sun.corba.se.impl.orb.ORBImpl.resolve_initial_references(ORBImpl.java:1151)
    at EvaluateInstance.InitializeModules(EvaluateInstance.java:152)
    at EvaluateInstance.initializeVariables(EvaluateInstance.java:326)
    at EvaluateCF.initializeInstances(EvaluateCF.java:1792)
    at EvaluateCF.processRequest(EvaluateCF.java:112)
    at coldfusion.tagext.CfxTag.doStartTag(CfxTag.java:102)
    at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722)
    at cfconfglobalconstants2ecfm330318830._factor9(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/confglobalconstants.cfm:372)
    at cfconfglobalconstants2ecfm330318830._factor10(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/confglobalconstants.cfm:13)
    at cfconfglobalconstants2ecfm330318830._factor11(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/confglobalconstants.cfm:6)
    at cfconfglobalconstants2ecfm330318830.runPage(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/confglobalconstants.cfm:1)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416)
    at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722)
    at cfapp_globals2ecfm1890385339.runPage(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/app_globals.cfm:61)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416)
    at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722)
    at cfapp_locals2ecfm610494134.runPage(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/securitycontrol/app_locals.cfm:49)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416)
    at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:2722)
    at cfdefault2ecfm129406838._factor9(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/securitycontrol/default.cfm:107)
    at cfdefault2ecfm129406838.runPage(/opt/jrun4/servers/or_dev87/cfusion-ear/cfusion-war/origenate/securitycontrol/default.cfm:1)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:231)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:416)
    at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65)
    at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:381)
    at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:48)
    at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
    at coldfusion.filter.PathFilter.invoke(PathFilter.java:94)
    at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:70)
    at coldfusion.filter.BrowserDebugFilter.invoke(BrowserDebugFilter.java:79)
    at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
    at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
    at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:46)
    at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
    at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
    at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62)
    at coldfusion.CfmServlet.service(CfmServlet.java:200)
    at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89)
    at jrun.servlet.FilterChain.doFilter(FilterChain.java:86)
    at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)
    at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)
    at jrun.servlet.FilterChain.doFilter(FilterChain.java:94)
    at jrun.servlet.FilterChain.service(FilterChain.java:101)
    at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:106)
    at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
    at jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:286)
    at jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:543)
    at jrun.servlet.http.WebService.invokeRunnable(WebService.java:172)
    at jrunx.scheduler.ThreadPool$DownstreamMetrics.invokeRunnable(ThreadPool.java:320)
    at jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:428)
    at jrunx.scheduler.ThreadPool$UpstreamMetrics.invokeRunnable(ThreadPool.java:266)
    at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)
 Caused by: java.net.ConnectException: Connection refused
    at sun.nio.ch.Net.connect(Native Method)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:500)
    at java.nio.channels.SocketChannel.open(SocketChannel.java:146)
    at com.sun.corba.se.impl.transport.DefaultSocketFactoryImpl.createSocket(DefaultSocketFactoryImpl.java:60)
    at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:188)
    ... 64 more

Is it something to do with the properties? Because the two boxes can hear each other perfectly well on the defined ports.

Also, when I do a netstat on the Linux box, it shows up a LISTENING connection to the port from the Solaris box. What makes the response return as a 127.0.0.1?

The Solaris box is called yyyy, and the Linux box is called xxxx. The initial port and host is gotten through an ini file.

Answer 1

You should first start the ORB port with this command :

orbd -ORBInitialPort [PORT NUMBER]

Answer 2

The problem was nothing to do with the code. It was something to do with connectivity.

On the LINUX box, cmrheldv, I had to edit the /etc/hosts file and change the 127.0.0.1 to the real ip for the localhost.

http://jeewesley.blogspot.com/2008/12/glassfish-ejb3-remote-interface-on.html

Answer 3

Try to set the path to your variable and start orbd.

Open cmd and type:

set path=%path%;"C:\Program Files\Java\jdk1.8.0_65\bin"

After that:

start orbd