Hello!
I'm trying to create a TreeCache in a JBoss Server Cluster with 3 Servers. They share
the same Partition (DefaultPartition) and are a clean server/all configuration.
Now I tried to establish a Stateless Session Bean with a single method, shown below:
| public
| void createTreeCache()
| {
| //## begin ControllerBean::createTreeCache%40A1C2520244.body preserve=yes
| try
| {
| TreeCache tree = new TreeCache();
| tree.setClusterName("demo-cluster");
| tree.setTransactionManagerLookupClass(
"org.jboss.cache.DummyTransactionManagerLookup" );
| tree.setCacheMode(TreeCache.REPL_SYNC);
| tree.startService(); // kick start tree cache
| tree.put("/a/b/c", "name", "Ben");
| java.util.Iterator i = tree.getChildrenNames( "/a/b/c" ).iterator();
| while( i.hasNext() )
| System.out.println(">>>>>>>>>>>" + i.next().toString() +
"<<<<<<<<<<<");
| tree.remove("/a/b");
| tree.stopService();
| }
| catch(Exception e)
| {
| e.printStackTrace();
| }
| //## end ControllerBean::createTreeCache%40A1C2520244.body
| } // --- end of createTreeCache --------------------------------------------
|
I know I should use an property XML file, but for now...
Now, here is my problem:
First I started only one server and the JBoss output was:
anonymous wrote :
| 10:10:56,332 INFO [MainDeployer] Deployed package:
file:/D:/Projects/Java/jboss3/server/all/deploy/test-ejb.jar
| 10:10:59,276 INFO [STDOUT] >>>>>>>>>>>Creating<<<<<<<<<<<
| 10:10:59,276 INFO [TreeCache] cache mode is REPL_SYNC
| 10:10:59,317 INFO [STDOUT]
| -------------------------------------------------------
| GMS: address is pc153:4699
| -------------------------------------------------------
| 10:11:01,940 INFO [TreeCache] viewAccepted(): new members: [pc153:4699]
| 10:11:01,970 INFO [TreeCache] state could not be retrieved (must be first member
in group)
| 10:11:01,970 ERROR [STDERR] java.lang.NullPointerException
| 10:11:01,980 ERROR [STDERR] at
com.siemens.is.its.airfield.aglseries.test.ControllerBean.createTreeCache(ControllerBean.java:182)
| 10:11:02,000 ERROR [STDERR] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| 10:11:02,010 INFO [TreeCache] setState(): new cache is null (maybe first member
in cluster)
| ... (many more of 'em!)
|
Now, where lies the problem, is this way I've chosen the correct way of getting values
out of the TreeCache?
Greetings and many thanks
Victor Sauermann
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