BEA-473003 Destination unreachable on t3s; nested exception is: java.net.NoRouteToHostException

Problem

Seeing these errors in osb_server1.out log file (note the T3S protocol in the log):

<Mar 29, 2018 4:14:00 PM GMT> <Error> <ALSB Statistics Manager> <BEA-473003> <Aggregation Server Not Available. Failed to get remote aggregator
javax.naming.CommunicationException [Root exception is java.net.ConnectException: t3s://192.168.0.30:8011: Destination unreachable; nested exception is:
        java.net.NoRouteToHostException: No route to host (Host unreachable); No available router to destination]
        at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:40)
        at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:792)
        at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:368)
        at weblogic.jndi.Environment.getContext(Environment.java:315)
        at weblogic.jndi.Environment.getContext(Environment.java:285)
        Truncated. see log file for complete stacktrace
Caused By: java.net.ConnectException: t3s://192.168.0.30:8015: Destination unreachable; nested exception is:
        java.net.NoRouteToHostException: No route to host (Host unreachable); No available router to destination
        at weblogic.rjvm.RJVMFinder.findOrCreateInternal(RJVMFinder.java:216)
        at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:170)
        at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:165)
        at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:353)
        at weblogic.jndi.Environment.getContext(Environment.java:315)
        Truncated. see log file for complete stacktrace
Caused By: java.rmi.ConnectException: Destination unreachable; nested exception is:
        java.net.NoRouteToHostException: No route to host (Host unreachable); No available router to destination
        at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:470)
        at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:321)
        at weblogic.rjvm.RJVMManager.findOrCreateRemoteInternal(RJVMManager.java:262)
        at weblogic.rjvm.RJVMManager.findOrCreate(RJVMManager.java:199)
        at weblogic.rjvm.RJVMFinder.findOrCreateRemoteServer(RJVMFinder.java:238)
        Truncated. see log file for complete stacktrace
>

Solution

1. Log in to the WebLogic Admin Console

2. Navigate to [managed server] > SSL > Advanced

3. Set "Hostname Verification" to "None"

4. Repeat for all managed servers

5. Restart the managed servers

Applicable Versions

• Oracle Service Bus (OSB) 11g (11.1.1.9.0)