Hello Kedar :
Hello Dev Teams:
I have a problem about the destruction of definition of <server-ref> in domian.xml.
-> kedar,Dev Members:
I have ever meeted an case in which when creating instance, <server-ref> tag in domian.xml missed "ref" attribute. Then, I found the following information in the server.log:
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..........
Caused by: com.sun.enterprise.admin.servermgmt.InstanceException:
java.lang.NullPointerException
at
com.sun.enterprise.ee.admin.clientreg.InstanceRegistry.getInstanceConnectionInfo(InstanceRegistry.java:194)
at
com.sun.enterprise.ee.admin.configbeans.PortConflictCheckerConfigBean.checkForPortConflicts(PortConflictCheckerConfigBean.java:447)
at
com.sun.enterprise.ee.admin.configbeans.ServersConfigBean.resolvePortConflicts(ServersConfigBean.java:745)
at
com.sun.enterprise.ee.admin.configbeans.ServersConfigBean.createServerInstance(ServersConfigBean.java:874)
at
com.sun.enterprise.ee.admin.mbeans.ServersConfigMBean.createServerInstance(ServersConfigMBean.java:238)
at
...
Caused by: com.sun.enterprise.ee.admin.servermgmt.AgentException:
java.lang.NullPointerException
at
com.sun.enterprise.ee.admin.clientreg.InstanceRegistry.findConnectionInfo(InstanceRegistry.java:108)
at
com.sun.enterprise.ee.admin.clientreg.InstanceRegistry.getInstanceConnectionInfo(InstanceRegistry.java:192)
... 76 more
Caused by: java.lang.NullPointerException
at
com.sun.enterprise.config.serverbeans.ServerHelper.isServerClustered(ServerHelper.java:410)
at
com.sun.enterprise.config.serverbeans.PropertyResolver.<init>(PropertyResolver.java:60)
at
com.sun.enterprise.config.serverbeans.ServerHelper.getJMXConnectorInfo(ServerHelper.java:331)
at
com.sun.enterprise.ee.admin.clientreg.InstanceRegistry.findConnectionInfo(InstanceRegistry.java:104)
... 77 more
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I am very curious about the above exception,especially the "NullPointerException".
I start to look for the clue in the code.And I have some issues:
In ServersConfigBean.java, createClusteredServerInstance(..) method has some contents:
.....
//Add the server to the cluster
ServerRef serverRef = new ServerRef();
serverRef.setRef(server.getName());
cluster.addServerRef(serverRef, OVERWRITE);
.....
Can "cluster.addServerRef(serverRef, OVERWRITE) " add the <server-ref> to the domain.xml only if the "OVERWRITE" is the TRUE?
If not, Can "cluster.addServerRef(serverRef, OVERWRITE) " add the <server-ref> to the current ConfigContext?
I still find the "flushAll()" method should perisist the config changes to the domain.xml.isn't it?
Could you please give me some suggestion?
Thanks!
Mike.Tang
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